Tesis sobre el tema "Land use Land use Landscape changes Landscape changes"

The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on November 17, 2009). Thesis advisor: Dr. C. Mark Cowell. Includes bibliographical references.

Freshwater is a vital resource that circulates between the atmosphere, the land and the sea. Understanding and quantifying changes to the partitioning of precipitation into evapotranspiration, runoff and water storage change in the landscape are required for assessing changes to freshwater availability. However, the partitioning processes and their changes are complex due to multiple change drivers and effects. This thesis investigates and aims to identify and separate the effects of atmospheric climate change and various landscape drivers on long-term freshwater change. This is done based on hydroclimatic, land-use and water-use data from the beginning of the twentieth century up to present times and across different regions and scales, from catchment to global. The analyzed landscape drivers include historic developments of irrigated and non-irrigated agriculture and flow regulation. The thesis uses and develops further a data-motivated approach to interpret available hydroclimatic and landscape data for identification of water change drivers and effects, expanding the approach application from local to continental and global scales. Based on this approach development, the thesis identifies hydroclimatic change signals of landscape drivers against the background of multiple coexisting drivers influencing worldwide freshwater change, within and among hydrological basins. Globally, landscape drivers are needed to explain more than 70% of the historic hydroclimatic changes, of which a considerable proportion may be directly human-driven. These landscape- and human-driven water changes need to be considered and accounted for also in modeling and projection of changes to the freshwater system on land.

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.

VR, project 2009-3221

Deforestation and land use change are widespread in western Uganda. However, the spatial patterns and time-series of change and the reasons why it is occurring remain to be fully investigated. In this work a combination of satellite imagery and social surveys is used to quantify forest gains and loss over the last three decades in the region close to Lake Albert, whilst also providing an account of possible drivers of change. This area proves to be interesting as it covers regions with both formally protected areas (gazetted regions) and un-protected forest, the latter being largely under private ownership. Remote sensing data from the Landsat satellites were gathered for forest change detection, and were processed using standard remote sensing techniques, then quantified using GIS and regression methods. Fieldwork allowed these data to be ground truthed while gathering (quantitative) household surveys and (qualitative) key informant interviews. Quantitative surveys were analysed using Principal Components Analysis (PCA) and cluster analysis, and were compared qualitatively with the satellite analysis and stakeholder interviews. The results show that forest cover declined significantly outside gazetted areas at the expense of varying local?scale processes, although the protection of the gazetted forests was remarkably successful. In forest corridors outside gazetted regions, losses exceeded 90% (p<0.05). Survey data suggest that rural poor households were more likely to be situated in forested regions, and were more dependent on forest resources for their livelihoods. However, the drivers of change were spatially variable, with expansion of sugarcane farming being a likely driver in the northern areas, but small?scale agricultural expansion a significant factor in the more southern parts of the study region. While there is wide agreement within the data that the patterns of forest cover and land use changes are anthropogenically driven, more specific drivers are swamped by intricacies of the bio-physical and socio-economic preconditions that are inseparable in both space and time, although agricultural expansion and population growth were evident and pervasive. The analyses provide insights into complex anthropogenic processes at various spatial scales, and policy recommendations provided are widely applicable for developing countries struggling to conserve nature whilst boosting economic growth.

Les « hotspots » de la biodiversité du Cerrado et des forêts atlantiques ont souffert des changements rapides d’utilisation du sol au cours des cinq dernières décennies, résultant en une fragmentation de l’habitat, l’invasion d’espèces exotiques et la perte de biodiversité. Les mammifères herbivores sont une communauté clé pour étudier les impacts des changements d’utilisation des sols, car ils sont directement influencés par la structure du paysage. Premièrement, nous avons examiné des articles publiés entre 2002 et 2018 sur les mammifères terrestres dans des contextes de changement d’utilisation du sol dans le Cerrado brésilien. Nous avons constaté que les réactions négatives des mammifères aux changements d'utilisation du sol étaient associées à l'agriculture, à l'élevage, aux routes et aux zones urbaines. De plus, nous identifions de grandes lacunes de connaissances. Deuxièmement, nous avons collecté des données sur la communauté de mammifères herbivores à travers les gradients de changements d'utilisation du sol sur le plateau de Bodoquena au Brésil entre février 2016 et décembre 2017. Nous analysions comment et à quelle échelle trois métriques du paysage (pourcentage de couverture forestière, densité de parcelles et densité de lisières) affectent l'occurrence de quatre espèces herbivores (Dasyprocta azarae, Pecari tajacu, Mazama gouazoubira et Tapirus terrestris). Nous avons trouvé des différences dans les échelles auxquelles les espèces ont répondu à différentes mesures du paysage. Enfin, nous avons modélisé l'occupation de 23 mammifères herbivores dans le paysage du plateau de Bodoquena. Le modèle d'occupation en fonction du couvert forestier a montré des réactions idiosyncratiques par espèce aux changements d'utilisation du sol. Par conséquent, nous recommandons des stratégies différentes et complémentaires, notamment la restauration de l'habitat, pour la protection et gestion des mammifères herbivores au plateau de Bodoquena
The Cerrado and Atlantic forest biodiversity hotspots have been experiencing rapid land-use changes in the last five decades resulting in habitat fragmentation, invasion of exotic species and biodiversity loss. Herbivore mammals are a key community to investigate the impacts of land-use changes on biodiversity, because they are directly influenced by the landscape structure. In a first step, we reviewed articles published between 2002 and 2018 about terrestrial mammals in contexts of land-use change in the Brazilian Cerrado. We found that negative responses of mammals to land-use changes were mainly associated with agriculture, livestock, roads and urban areas. Moreover, we identified big knowledge gaps, for example in the coverage of research areas or species. Secondly, we collected data on the community of herbivore mammals across gradients of land-use changes in the Bodoquena Plateau in Brazil between February 2016 and December 2017. We analyzed how and on which scale three landscape metrics (percentage of forest cover, patch density and edge density) affect the occurrence of four herbivore species (Dasyprocta azarae, Pecari tajacu, Mazama gouazoubira and Tapirus terrestris). We found differences in the scales at which the species responded to different landscape metrics. Finally, we modeled the occupancy of 23 herbivore mammals in the landscape of the Bodoquena Plateau. The pattern of occupancy as a function of forest cover percentage showed idiosyncratic responses per species to land-use changes. Therefore, we recommend different and complementary strategies including habitat restoration for conservation and management of herbivore mammals in the Bodoquena Plateau

Abstract - Land cover, land use and landscape changes in the Mértola municipality in South Portugal of the period 1958 - 1985 are explored by means of aerial photo interpretation, interviews with land owners and a range of mathematical and statistical techniques. Conceptualisation of frequently used terminology as land abandonment and the application of commonly applied techniques as mapping land cover deserve extra attention in projects carried out in Mediterranean agro-silvopastoral systems. Extensification trends, meaning a shift from arable land to forest plantation and scrub, mark the major trends in the area. Within the study period this process has caused a more heterogenous landscape pattern. Analysis of the determinant factors of the location of land use change, reveals that the type of land owner is an important predictive variable when arable land changes to forest plantation or to agro-silvo-pastoral systems. In the case of land abandonment, biophysical conditions are more decisive. ### Resumo - Em duas áreas pertencentes ao concelho de Mértola, localizado na região do Baixo-Alentejo no Sul de Portugal, as mudanças de ocupação do solo, de uso do solo e da paisagem são exploradas no periodo 1958-2000, recorrendo à foto-interpretação, a entrevistas com agricultores e uma rama de diferentes técnicas de matemática e estatística. 0 uso unívoco de conceitos, como abandono da terra, metodologias e ferramentas, como a cartografia de ocupação do solo, merece atenção especial na investigação de paisagens agro-silvo-pastoris no Mediterrâneo. A mudança mais comum é a transição da terra arável para montado, novas florestações e mato. Durante o periodo de estudo este procceso resultou numa paisagem mais heterogeneia. A análise das forças motrizes de 3 transições de terra arável, revela que as variáveis sócio-económicas locais estão fortemente relacionados com a ocorrência de transição de terra arável para novas florestações e para montado, enquanto as variáveis biofísicas são mais relacionadas com o abandono de terra arável.

Biological invasions are a wicked, social-ecological problem, interacting with numerous components within and across a range of spatio-temporal scales, with the potential to disturb broader socio-economic and ecological systems. Acacia dealbata is an invasive shrub in South Africa, widely naturalised across the grassland biome. Although the deployment of a biocontrol agent on A. dealbata is apparently justified considering its highly invasive and ecologically destructive nature, it should proceed with caution due to the integration of the species into the livelihoods of rural communities. This study sought to understand the nature and extent of the A. dealbata invasion in the northern Eastern Cape. Research was conducted in nine villages in rural Matatiele, Mount Fletcher and Maclear, selected for the pervasiveness of A. dealbata around these villages. A time-series of aerial photographs were systematically classified according to designated A. dealbata and land-use/land cover (LULC) categories in ArcGIS to track changes in the extent and rate of spread of A. dealbata, while standard vegetation surveying techniques were used to determine the current abundance and productivity of A. dealbata in selected areas. A high degree of spatial variability characterised the extent, density and biomass of A. dealbata, as well as the annual rate of spread and biomass production. The growth, productivity and spread of A. dealbata were significantly positive, and relatively few biophysical conditions correlated with the invasion. This was indicative of the broad range of invaded and potentially invasible habitats, suggesting that the extent and abundance of A. dealbata will likely continue to increase, barring deliberate intervention. Broader changes in LULC were also apparent, multidirectional and spatio- temporally variable. Despite a net increase in A. dealbata, the invasion was found to be highly dynamic, with various LULC transitioning to A. dealbata, but in turn A. dealbata transitioning to other LULC. Indeed, biological invasions are dynamic, context-specific phenomena, shaped by the heterogeneity of landscapes. Management interventions to limit or control A. dealbata should therefore consider the spatio-temporal dynamics of invaded landscapes, as well as the local-scale abundance, productivity and biophysical conditions of the area, while taking into consideration the livelihood requirements of the local communities.

Landscapes are changing environments. Conservation of the amenities associated with landscapes must take into account the tendency of a landscape to change over time. Change is considered to be influenced by both cultural land use practices and natural resource processes which act on the landscape. A technique is developed which demonstrates an approach to measure the stability of landscapes. This approach also provides a means to qualify the importance of the elements which make up the landscape, thus defining the matrix of the landscape. A case study of the San Pedro National Conservation Area is used to demonstrate the technique. Sampled at three intervals 1935, 1973 and 1986 the landscape is shown to be stable, identifying this area with intrinsic value for conservation. Landscape scale assessments are shown to be inappropriate for ecosystem scale changes.

Els models matemàtics s'utilitzen per explicar fenòmens naturals. Com que els fenòmens naturals són molt complexes, per tal d'aprofundir en el seu comportament i ser capaç de fer prediccions sobre ells, es necessita passar per un procés de simplificació. En el procés de creació del model, el sistema es tradueix a llenguatge matemàtic que permet l'estudi del sistema des d'un nou punt de vista. En aquesta tesi, es consideren models estadístics per estudiar el comportament dels agroecosistemes a diferents escales espacials. L'objectiu d'aquest treball és estudiar la relació entre fluxos d'energia, canvis de cobertes del sòl, la funcionalitat del paisatge i la biodiversitat que subjau en els agroecosistemes. Per a això, es proposen models basats en tals matèries. Les principals unitats d'anàlisi seran les cobertes del sòl, quan treballem a escala regional, i els usos del sòl, a escala local. En el segon capítol, es presenta un model de pertorbació-complexitat intermèdia (IDC) dels paisatges culturals. Aquest enfocament té com a objectiu avaluar com els diferents nivells de pertorbacions antropogèniques sobre els ecosistemes afecten la capacitat d'acollir la biodiversitat en funció de l'heterogeneïtat d'usos sòl. S'aplica a l'illa de Mallorca, enmig de la zona activa de la biodiversitat mediterrània, a escala regional i de paisatge. El model utilitza la pertorbació exercida pels agricultors que alteren la producció primària neta a través del canvi d'usos del sòl, així com l'eliminació d'una part d'ella, juntament amb l'índex de Shannon-Wiener de la diversitat d'usos del sòl. El model es prova en un disseny experimental a dues escales al llarg de tres punts de temps. La riquesa d'espècies d'aus nidificants i hivernants, preses com a indicador de la biodiversitat, s'utilitza en una anàlisi factorial exploratori. Seguint la idea presentada en el segon capítol, en el tercer capítol es presenta un mètode per descriure la relació entre els indicadors d'heterogeneïtat d'usos del sòl, i l'apropiació humana de la producció primària neta en una regió determinada. Aquestes quantitats són vistes com a funcions del vector de proporcions de les cobertes de sòl, que al seu torn es tracta com un vector aleatori els valors del qual depenen de la unitat de terreny que s'observa. Presentem el mètode suposant, en primer lloc, que el vector de proporcions segueix una distribució uniforme en el símplex. Després, considerem com a punt de partida un conjunt de dades mostals, de manera que primer hem d'obtenir una estimació de la seva distribució de probabilitat teòrica, i en segon lloc, generem una mostra de grans dimensions seguint la distribució estimada. Apliquem aquest procediment a dades de l'illa de Mallorca en tres moments de temps diferents. L'objectiu principal aquí és calcular el valor esperat de la diversitat del paisatge com a funció del nivell d'apropiació humana. Aquesta funció està relacionada amb l'anomenada hipòtesi d'energia i espècies, i amb l'hipòtesi de la Pertorbació Intermèdia. Finalment, el quart capítol està dedicat a tractar els processos interns dels agroecosistemes. Per a aquest propòsit, es proposa un graf que representa el patró de fluxos d'energia en un agroecosistema. Utilitzem aquest graf per calcular el nivell d'emmagatzematge d'energia dins de l'agroecosistema, així com la informació inclosa en aquesta xarxa de fluxos, a escales tant local com de paisatge. Per tant, es proposa un model d'anàlisi integrat d'energia i paisatge (ELIA) que avalua tant la complexitat dels bucles d'energia interna, com la informació continguda en tota la xarxa de fluxos d'energia soci-metabòliques, per tal de correlacionar aquesta interacció d'informació energètica amb l'estructura funcional del paisatge. A l'annex, es suggereix una millora de l'indicador d'informació. ELIA es prova en el Vallès, a la Regió Metropolitana de Barcelona.
Mathematical models are used to better explain natural phenomena. Since natural phenomena are very complex, in order to delve into their behaviour and be able to do predictions over them, a simplification process of such systems is needed. In the process of creating the model, the system is translated into mathematical language that allows the study of the system from a new point of view. In this thesis, statistical models are considered to study the behaviour of agroecosystems at different spatial scales. The aim of this work is to study the relation between energy flows, land cover changes, landscape functionality and the biodiversity that underlies in agroecosystems. For this, models based on such matters are proposed. The main units of analysis will be the land covers, when we work at regional scale, and the land uses, at local scale. In the second chapter, an intermediate disturbance-complexity model (IDC) of cultural landscapes is presented. This approach is aimed at assessing how different levels of anthropogenic disturbance on ecosystems affect the capacity to host biodiversity depending on the land matrix heterogeneity. It is applied to the Mallorca Island, amidst the Mediterranean biodiversity hotspot, at regional and landscape scales. The model uses the disturbance exerted by farmers altering the Net Primary Production (NPP) through land use change, as well as removing a share of it, together with Shannon-Wiener index of land use diversity. The model is tested with a twofold-scalar experimental design of a set of landscape units along three time points. Species richness of breeding and wintering birds, taken as a biodiversity proxy, is used in an exploratory factor analysis. Following the idea presented in the second chapter, in the third chapter we present a method to describe the relation between indicators of the land matrix heterogeneity, and the human appropriation of the net primary production in a given region. These quantities are viewed as functions of the vector of proportions of the different land covers, which is in turn treated as a random vector whose values depend on the particular small terrain cell that is observed. We illustrate the method assuming first that the vector of proportions follows a uniform distribution on the simplex. We then consider as starting point a raw dataset of proportions for each cell, for which we must first obtain an estimate of its theoretical probability distribution, and secondly generate a sample of large size from it. We apply this procedure to real historical data of the Mallorca Island in three different time points. The main goal here is to compute the mean value of the land covers diversity as a function of the level of human appropriation of net primary production. This function is related to the so-called Energy-Species hypothesis and to the Intermediate Disturbance Hypothesis. Finally, fourth chapter is devoted to deal with agroecosystems internal processes. For this purpose, a graph to represent the pattern of energy flows in an agroecosystem is presented. We use this graph model to calculate the level of energy storage within the agroecosystem provided by its ‘internal feedback’, as well as the information embedded in this network of flows, at local and landscape scales. Thus, we propose an Energy-Landscape Integrated Analysis (ELIA) model that assesses both the complexity of internal energy loops, and the information held in the whole network of socio-metabolic energy fluxes, so as to correlate this energy-information interplay with the functional landscape structure. In the annex, an improvement of the information indicator is suggested. ELIA is tested in the Vallès County of the Barcelona Metropolitan Region.

Les changements globaux affectent la biodiversité à tous les niveaux de l’espace, du temps et d’organisation biologique. Afin de limiter notre impact sur le monde naturel, il est nécessaire de concilier nos activités avec les dynamiques de la biodiversité. Dans ce but, l’écologie scientifique a pour rôle d’apporter les connaissances scientifiques nécessaires à la compréhension et à la prédiction des réponses de la biodiversité lorsqu’elle est confrontée à de tels changements environnementaux. Or, la compréhension des processus par lesquels les activités humaines influent sur la diversité écologique est limité par la compartimentation de la discipline dans les échelles spatiales, temporelles, et entre les niveaux d’organisations.Partant de ce constat, ce travail de thèse s’est intéressé aux réponses des communautés d’oiseaux communs au changement climatique, en proposant une vision intégrative de l’écologie des changements globaux. J’ai notamment cherché à montrer comment la prise en compte des interactions entre les différentes échelles nous permettaient de lever le voile sur les processus mis en jeu dans les réponses des communautés précédemment décrites sur de larges échelles. En analysant des données issus de suivis à long-terme des oiseaux nicheurs communs en Europe (France, Suède) et en Amérique du Nord, j’ai proposé une navigation dans les dimensions spatiales, temporelles et les niveaux d’organisations. En confrontant les différentes échelles, mes travaux ont notamment montré que :(i) la recomposition thermique des communautés est une réponse non-linéaire aux variations de température déterminée à l’échelle locale, probablement via des processus démographiques influencés par les anomalies de températures.(ii) la présence d’aires protégées, la diversité en habitat et la topographie du paysage facilite la réponse des oiseaux communs aux variations de températures locales.(iii) la réponse à l’échelle des communautés est le fruit d’une interaction entre les dynamiques des espèces et les caractéristiques de leur niche thermique : les espèces abondantes ainsi que les espèces plus rares aux niches thermiques froides sont responsables des dynamiques de communautés observées.(v) le changement climatique joue un rôle notable dans le processus d’homogénéisation biotique. Les variations de température locales amènent une perte des espèces spécialistes et fonctionnellement originales, probablement via le relâchement des filtres écologiques sur l’assemblage des communautés.J’explore les conséquences de ces résultats sur notre compréhension des processus qui sous-tendent l’impact du changement climatique sur la composition fonctionnelle des communautés, ainsi que sur l’adaptation de nos stratégies d’aménagement du territoire. Je propose en conclusion de dépasser les clivages de l’écologie pour prendre plus explicitement et plus systématiquement en compte les interactions entre échelles. Je défends l’idée selon laquelle cette évolution de paradigme est nécessaire au développement d’une (macro) écologie plus mature et prédictive à même de répondre au défi imposé par la crise de la biodiversité
Global changes affect biodiversity at all spatial, temporal and biological scales. In order to mitigate the human impact on nature, we must balance our activitis with biodiversity dynamics. To this end, scientific ecology must provide the scientific knowledge necessary for the understanding and prediction of biodiversity responses facing environmental changes. However, understanding the processes by which human activities affect the ecological diversity is still limited by the separation of ecology in different geographical, temporal, and biological levels.My work investigated birds’ communities responses to climate change by adopting an integrative view of global changes ecology. I precisely sought to show how considering interactions between different scales can unveil the processes involved in over large scales community responses previously described. By analyzing data from long-term monitoring of common breeding birds in Europe (France, Sweden) and North-America, I proposed proposed a multi-scale consideratin of space, time and levels of organizations. By confronting different scales, my work has shown that:(i) thermal recomposition of communities is a non-linear response to temperature variations locally determined, probably via demographic processes influenced by temperature anomalies.(ii) the amount of protected areas, habitat diversity and landscape topography promotes the response of common birds to local temperature variations.(iii) community level responses are shaped by the interaction between the species dynamics and their their thermal niche: both abundant species and rare species with cold thermal niches are responsible for the observed community dynamics.(iv) climate change drives a part of the biotic homogenization process. Local temperature changes lead to a relative loss of habitat-specialist and functionally original species, probably via the relaxation of environmental filters on the assembly of communities.I discussed the implications of these results on our understanding of the processes underlying the impact of climate change on the functional composition of communities, as well as adaptation of our land-management strategies. In conclusion, I suggest to move towards a more unified ecology by taking more explicitly and systematically into account the interactions between scales. I argue that such a change is necessary for the development of a more mature and predictive ecology able to took on the challenge imposed by the ongoing biodiversity crisis

Thesis (MSc)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: The multifaceted land degradation problem and its associated manifold impacts have attracted research from different disciplines, resulting in varying definitions of the concept. However, most researchers agree that human intervention that deteriorates the state of the environment is the central element. Among the anthropogenic activities that exacerbate land degradation, land cover has been singled out as the salient element. Rapid and unplanned land cover changes are primary manifestations of this problem. UMhlathuze Municipality, the study area which has superior biodiversity richness, is one of fastest growing municipalities in South Africa and is the locale of significant land modifications in recent decades because of a variety of industrial and residential developments. Using Landsat TM imagery acquired for 1984, 1996 and 2004, this study mapped and quantified land cover change and manifestations of land degradation in the uMhlathuze Municipality in conjunction with settlement intensification computed from orthophotographs acquired for 1984 and 2004. Census population statistics were analysed as a reflection of population dynamics and further to gauge related causes of land cover change. Geographical information technology (GIT) was applied as an analytical tool. The results revealed the anthropogenic influences that led to changes in land cover over the 20- year period between 1984 and 2004. The dominant natural cover classes in 1984 declined continuously and human-dominated land categories had increased sharply by 2004. Much of grasslands, forest and wetlands were converted to monotypical agroforestry (sugar cane and forestry plantations), built-up settlement and mining. These changes engendered complete loss of biodiversity (floral and migration of fauna). Bare ground, signifying land degradation, was noticeable although it exhibited a fluctuating trend which could be attributable to differences between the various imagery used. Along with population growth, the area of settlements increased over the study period and spatially sprawled from urban areas. Settlements showed a fairly stable spatial configuration over the 20-year period, but became magnified in medium- and high-density areas. Grassland and wetlands occurring around Richards Bay, as well as indigenous forest near Port Durnford, were identified as critically threatened ecosystems. The proposed industrial development zone and port expansion were recognized as having adverse ecological implications for wetlands. The study concluded that significant land cover changes occurred in the form of natural land cover giving way to monotypical agroforestry, built-up settlements and mining - all to the detriment of pristine natural habitat.
AFRIKAANSE OPSOMMING: Die veelvlakkige probleem van omgewingsdegradasie en die gepaardgaande veelsoortige impakte lok navorsing uit verskillende dissiplines, wat lei tot verskillende definisies van die konsep. Tog is die meeste navorsers dit eens dat menslike invloede die sentrale element is wat die toestand van die omgewing verswak. Van die vele menslike aktiwiteite is grondgebruikverandering uitgesonder as die belangrikste beïnvloeder van agteruitgang van die omgewing. Veral vinnige en onbeplande grondgebruikveranderinge verteenwoordig die primêre manifestasies van hierdie probleem. UMhlathuze Munisipaliteit, die studiegebied met 'n hoë biodiversiteitsrykdom, is een van die vinnigste groeiende munisipaliteite in Suid-Afrika, waar 'n verskeidenheid nywerheids- en residensiële ontwikkelings beduidende grondgebruikverandering oor die afgelope dekades dryf. Met behulp van Landsat TM beelde van 1984, 1996 en 2004, is hierdie studiegebied gekarteer en oppervlaktes gekwantifiseer om grondgebruikverandering en verwante manifestasies van die agteruitgang van landbedekking in die uMhlathuze Munisipaliteit te konstateer. Tesame hiermee is die verdigting van nedersettings ook met behulp van ortofoto’s van 1984 en 2004 aangeteken. Bevolkingsensusstatistieke is ontleed as weerspieëling van die gepaardgaande bevolkingsdinamika en om moontlike oorsake van verandering in grondbedekking te bepaal. Vir hierdie doel is geografiese inligtingstegnologie (GIT ) as analitiese instrument toegepas. Die resultate toon antropogeniese invloede lei tot veranderinge in grondbedekking oor die tydperk van 20 jaar tussen 1984 en 2004. Die dominante natuurlike dekkingsklasse in 1984 het voortdurend verminder en menslik-gedomineerde kategorieë het teen 2004 skerp gestyg. Baie van die grasvelde, woude en vleilande is daadwerklik omskep tot monotipiese agro-bosbou (suikerrieten bosbouplantasies), beboude nedersetting en mynbou. Hierdie veranderinge behels 'n volledige verlies van biodiversiteit (plantegroei en migrasie van fauna). Kaalgrond, wat dui op die agteruitgang van grondbedekking, was ook opvallend, hoewel dit 'n wisselende tendens toon wat ook kan wees as gevolg van die verskille tussen die beeldmateriaal wat gebruik is. Saam met die groei van die bevolking is bevind dat nedersettings oor die studieperiode toegeneem het en in tipiese spreipatrone weg van die stedelike gebiede uitbrei. Nedersettings het 'n redelik stabiele ruimtelike liggingsopset oor die tydperk van 20 jaar getoon, maar het in medium- en hoë- digtheid gebiedeverdeel. Die voorkoms van grasveld en vleiland rondom Richardsbaai, asook inheemse woud naby Port Durnford, is geïdentifiseer as krities-bedreigde ekosisteme. Die voorgestelde nywerheidsontwikkelingsone en hawe-uitbreiding is geïdentifiseer as ontwikkelings met nadelige ekologiese implikasies vir vleilande. Daar is dus tot die gevolgtrekking gekom dat beduidende voortgaande grondbedekkingveranderinge in die gebied voorkom, waarin natuurlike landdekking transformeer tot monotipiese agrobosbou, beboude nedersettings en mynbou - alles tot nadeel van die ongerepte natuurlike habitat.

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Land use changes have resulted in large environmental impacts, and in agricultural landscapes sometimes only forest fragments remain. However, riparian forest remnants can influence positively stream water quality, and serve as refuge to aquatic species sensible to deforestation. We evaluated if the presence of a riparian forest remnant influences the structure and composition of macroinvertebrate communities in a rural stream in southeastern Brazil. We sampled three reaches upstream (within abandoned sugarcane cultivation), one at the edge and nine downstream the remnant edge, until 600 m inside the forested area, using leaf litter bags. The abundances of Elmidae, Chironomidae, and total macroinvertebrates increased along the forest remnant, whereas the abundance of Baetidae, proportion of Ephemeroptera, Plecoptera and Trichoptera (EPT), EPT/Chironomidae ratio, and taxon richness and diversity decreased. EPT taxon richness and abundance did not vary along the forest remnant. Reaches upstream the remnant have herbs and grasses that increased microhabitat availability and, consequently, the diversity and taxon richness in this degraded areas. Increases in abundances of Chironomidae and total macroinvertebrates within the forested area can be related to moderate increases in nutrient concentrations or availability of high quality leaf litter patches. Forest remnants can influence macroinvertebrate communities, although variation in their responses can be related to local agricultural practices and land use at the watershed scale. Forest fragments are important in maintaining water quality in agricultural landscapes, deserving special attention in watershed management projects and more commitment from the authorities to comply with environmental laws, aiming to protect and recover permanent preservation areas (PPA) in irregular situation.
Alterações no uso da terra geram grandes impactos ambientais, e em paisagens agrícolas podem restar apenas fragmentos florestais, com pouca continuidade florestal. No entanto, os remanescentes de matas ripárias podem ter efeitos positivos sobre a qualidade da água de córregos, e servem como refúgio para espécies aquáticas sensíveis ao desmatamento. Nós avaliamos se e a presença de um fragmento de floresta ripária influencia a estrutura e composição das comunidades de macroinvertebrados ao longo do gradiente longitudinal de um córrego situado em uma área rural no sudeste brasileiro. Amostramos treze trechos do córrego, três a montante (situados em meio a uma plantação de cana-de-açúcar abandonada e próximos a esta), um na borda e nove a jusante da borda do fragmento abrangendo até 600 m o interior da área florestada, usando sacos de detritos. As abundâncias de Elmidae, Chironomidae e do total de macroinvertebrados aumentaram ao longo do fragmento florestal, enquanto a abundância de Baetidae, abundância relativa de Ephemeroptera, Plecoptera e Trichoptera (EPT), razão das abundâncias EPT/Chironomidae, riqueza e diversidade taxonômica diminuíram. A abundância e a riqueza de táxons de EPT não variaram ao longo do remanescente. Os trechos a montante do remanescente apresentam herbáceas e gramíneas que aumentaram a disponibilidade de microhabitats e, consequentemente, a riqueza e diversidade de táxons nessas áreas degradadas. Os aumentos das abundâncias de Chironomidae e do total de macroinvertebrados no interior da área florestada podem estar relacionados à moderada elevação da concentração de nutrientes ou disponibilidade de manchas foliares de alta qualidade. Os remanescentes florestais podem influenciar as comunidades de macroinvertebrados, embora variações em suas respostas possam estar relacionadas às práticas agrícolas locais e ao uso da terra em escala de microbacia. Os fragmentos florestais são importantes na manutenção da qualidade da água em paisagens agrícolas, merecendo especial atenção em projetos de gestão de bacias hidrográficas e mais empenho por parte das autoridades para o cumprimento das leis ambientais, visando à proteção e recuperação de áreas de preservação permanente (APP) em situação irregular.

Die Landschaften Mitteleuropas sind das Resultat einer langwierigen Geschichte menschlicher Landnutzung mit ihren unterschiedlichen, z.T. konkurrierenden Nutzungsansprüchen. Durch eine überwiegend intensive Beanspruchung haben die direkten und indirekten Auswirkungen der Landnutzung in vielen Fällen zu Umweltproblemen geführt. Die Disziplin der Landschaftsökologie hat es sich zur Aufgabe gemacht, Konzepte für eine nachhaltige Nutzung der Landschaft zu entwickeln. Eine wichtige Fragestellung stellt dabei die Abschätzung der möglichen Folgen von Landnutzungsänderungen dar. Für die Analyse der relevanten Prozesse in der Landschaft werden häufig mathematische Modelle eingesetzt, welche es erlauben die Landschaft unter aktuellen Verhältnissen oder hinsichtlich veränderter Rahmenbedingungen zu untersuchen. Die hypothetische Änderung der Landnutzung, die als Landnutzungsszenario bezeichnet wird, verkörpert eine wesentliche Modifikation der Rahmenbedingungen, weil Landnutzung maßgeblich Einfluss auf die natürlichen Prozesse der Landschaft nimmt. Während die Antriebskräfte einer solchen Änderung überwiegend von sozio-ökonomischen und politischen Entscheidungen gesteuert werden, orientiert sich die exakte Verortung der Landnutzungsänderungen an den naturräumlichen Bedingungen und folgt z.T. erkennbaren Regeln. Anhand dieser Vorgaben ist es möglich, räumlich explizite Landnutzungsszenarien zu entwickeln, die als Eingangsdaten für die Modellierung verschiedener landschaftsökologischer Fragestellungen wie z.B. für die Untersuchung des Einflusses der Landnutzung auf den Wasserhaushalt, die Erosionsgefahr oder die Habitatqualität dienen können. Im Rahmen dieser Dissertation wurde das rasterbasierte deterministische Allokationsmodell luck (Land Use Change Scenario Kit) für die explizite Verortung der Landnutzungsänderungen entwickelt. Es basiert auf den in der Landschaftsökologie üblichen räumlichen Daten wie Landnutzung, Boden sowie Topographie und richtet sich bei der Szenarienableitung nach den Leitbildern der Landschaftsplanung. Das Modell fußt auf der Hypothese, dass das Landnutzungsmuster als Funktion seiner landschaftsökologischen Faktoren beschrieben werden kann. Das Veränderungspotenzial einer Landnutzungseinheit resultiert im Modell aus einer Kombination der Bewertung der relativen Eignung des Standortes für die jeweilige Landnutzung und der Berücksichtigung von Standorteigenschaften der umliegenden Nachbarn. Die Durchführung der Landnutzungsänderung im Modell ist iterativ angelegt, um den graduellen Prozess des Landschaftswandels nachvollziehen zu können. Als Fallbeispiel für die Anwendung solcher räumlich expliziten Landnutzungsszenarien dient die Fragestellung, inwieweit Landnutzungsänderungen die Hochwasserentstehung beeinflussen. Um den Einfluss auf die Hochwasserentstehung für jede der Landnutzungskategorien – bebaute, landwirtschaftlich genutzte und naturnahe Flächen – abschätzen zu können, wird im Landnutzungsmodell luck exemplarisch für jede Kategorie ein Teilmodell für die Veränderung von Landnutzung angeboten: 1) Ausdehnung der Siedlungsfläche: Dieses Teilmodell fußt auf der Annahme, dass sich Siedlungen nur in direkter Nachbarschaft bereits bestehender Bebauung und bevorzugt entlang von Entwicklungsachsen ausbreiten. Steile Hangneigungen stellen für potenzielle Standorte ein Hemmnis bei der Ausbreitung dar. 2) Stilllegung von Grenzertragsackerflächen: Gemäß der Hypothese, dass sich die Stilllegung von Ackerflächen an der potenziellen Ertragsleistung der Standorte orientiert, werden in diesem Teilmodell alle Ackerstandorte dahingehend bewertet und die Flächen mit der geringsten Leistungsfähigkeit stillgelegt. Bei homogenen Gebietseigenschaften werden die Stilllegungsflächen zufällig auf die Ackerfläche verteilt. 3) Etablierung von Schutzgebieten in Ufer- und Auenbereichen: Ausgehend von der These, dass sich entlang von Flüssen sensible Flächen befinden, deren Schutz positive Folgen für das Leistungsvermögen der Landschaft haben kann, werden in diesem Teilmodell schützenswerte Ufer- und Auenbereiche auf derzeit landwirtschaftlich genutzten Flächen ausgewiesen. Die Größe der Schutzgebietsfläche orientiert sich an der Morphologie der umgebenden Landschaft. Die drei Teilmodelle wurden hinsichtlich der implizierten Hypothesen mit vielen unterschiedlichen Ansätzen validiert. Das Resultat dieser intensiven Analyse zeigt für jedes Teilmodell eine zufriedenstellende Tauglichkeit. Die Modellierung der Landnutzungsänderungen wurden in drei mesoskaligen Flusseinzugsgebieten mit einer Fläche zwischen 100 und 500 km² durchgeführt, die sich markant in ihrer Landnutzung unterscheiden. Besonderer Wert wurde bei der Gebietsauswahl darauf gelegt, dass eines der Gebiete intensiv landwirtschaftlich genutzt wird, eines dicht besiedelt und eines vorwiegend bewaldet ist. Im Hinblick auf ihre Relevanz für die vorliegende Fragestellung wurden aus bestehenden Landnutzungstrends die Szenarien für (1) die prognostizierte Siedlungsfläche für das Jahr 2010, (2) die möglichen Konsequenzen des EU-weiten Beschlusses der Agenda 2000 und (3) die Novelle des Bundesnaturschutzgesetzes aus dem Jahr 2001 abgeleitet. Jedes Szenario wurde mit Hilfe des Modells auf die drei Untersuchungsgebiete angewendet. Dabei wurden für die Siedlungsausdehnung in allen drei Gebieten realistische Landnutzungsmuster generiert. Einschränkungen ergeben sich bei der Suche nach Grenzertragsstilllegungsflächen. Hier hat unter homogenen Gebietseigenschaften die zufällige Verteilung von Flächen für die Stilllegung zu einem unrealistischen Ergebnis geführt. Die Güte der Schutzgebietsausweisung ist maßgeblich an die aktuelle Landnutzung der Aue und die Morphologie des Geländes gebunden. Die besten Ergebnisse werden erzielt, wenn die Flächen in den Ufer- und Auenbereichen mehrheitlich unter derzeitiger Ackernutzung stehen und der Flusslauf sich in das Relief eingetieft hat. Exemplarisch werden für jeden Landnutzungstrend die hydrologischen Auswirkungen anhand eines historischen Hochwassers beschrieben, aus denen jedoch keine pauschale Aussage zum Einfluss der Landnutzung abgeleitet werden kann. Die Studie demonstriert die Bedeutung des Landnutzungsmusters für die natürlichen Prozesse in der Landschaft und unterstreicht die Notwendigkeit einer räumlich expliziten Modellierung für landschaftsökologische Fragestellungen in der Mesoskala.
Today′s landscapes in Central Europe are the result of a long history of land-use, which is characterised by many different demands. The immediate and long-term consequences of predominantly intensive land-use have led to environmental problems in many cases. Therefore it is necessary to develop strategies for the maintenance of landscape efficiency which take into account the different claims of utilisation. In this context the estimation of possible impacts of land-use changes represents an important statement of problem. For the analysis of the relevant processes within the landscape, it is common to apply mathematical models. Such models enable the investigation of the landscape under current conditions or with regard to modified boundary conditions. A hypothetic alteration of land-use, which is termed as land-use scenario, represents a substantial modification of the boundary conditions, because land-use exerts a strong influence on the natural processes of the landscape. While the driving forces are predominantly governed by socio-economical and political decisions, the exact location of land-use changes within the landscape mainly depends on the natural conditions and follows partly transparent rules. With these presumptions it is possible to develop land-use scenarios, which can serve as input data for the modelling of different questions of landscape ecology such as the influence of land-use on the water balance, the danger of erosion or the quality of habitat characteristics. In the context of this thesis the grid-based deterministic allocation model luck (Land Use Change Scenario Kit) for the allocation of land-use changes was developed. It is based upon the types of spatial data, which are commonly used in landscape ecology, such as information on land-use, soils as well as topography. The derivation of scenarios follows the approaches of landscape planning. The model is based upon the hypothesis, that land-use structure can be described as a function of its landscape ecological factors. The potential of a site to become subject to land-use changes, results from a combination of its local qualities and the site characteristics of its neighbourhood. Land-use change is realised iteratively in order to simulate the gradual process of changes in the landscape. The influence of land-use changes on flood generation serves as a case study to demonstrate the need for spatial explicit land-use scenarios. For each land-use category – built up areas, agriculturally used areas and natural/semi-natural land – the model luck offers a submodel for investigating the effect of land-use changes on flood generation: 1) Expansion of settlement area: This submodel is based upon the assumption that settlements spread only in the neighbourhood of already existing built-up areas and preferentially along infrastructural axes of development. Steep slopes inhibit the spreading on potential locations. 2) Set-aside of marginal yield sites under agricultural use: Setting-aside of arable land is based on the hypothesis that the selection of arable land to be set-aside depends on the potential yield efficiency of the locations. Within this submodel all fields under agricultural use are valued to that effect and the ones with the least productive efficiency are selected as set-aside locations. In case of homogeneous area qualities the set-aside locations are selected randomly. 3) Establishment of protected areas in waterside and ripearian areas: This submodel takes into consideration that the protection of sensitive areas along the river courses may have positive consequences for the efficiency of the landscape. Therefore this submodel establishes protection zones on waterside and ripearian sites under currently agricultural use, that might be of value for nature conservation. The size of the protection area depends on the morphology of the surrounding landscape. The three submodels were validated with respect to the implied hypotheses by the help of many different approaches. The result of this intensive analysis shows a satisfying suitability for each of the submodels. The simulation of land-use changes was carried out for three mesoscale river catchments with an area between 100 and 500 km². Special attention was paid to the fact that these areas should be markingly different in their land-use: One study area is predominantly under intensive agricultural use, one is densely populated and the third one is covered by forest in large parts of the area. With regard to their relevance to the onhand question from existing land-use trends scenarios were derived for the prognosed settlement area for the year 2010, for the possible consequences of the EU-wide agreement of Agenda 2000 and for the amending federal conservation law dating to the year 2001, which enhances the enlargement of protected areas. Each scenario was applied to the three study areas utilizing the model luck. For the expansion of the settlement areas in all three study areas realistic land-use patterns were generated. Limitations arose only in the context of the search for marginal yield fields. Here, the random distribution of areas to be set-aside under homogeneous conditions led to unrealistic results. The quality of the establishment of protected areas in waterside and ripearian areas is substantially bound to current land-use and the morphology of the area. The best results for this submodel are achieved if waterside and ripearian areas are mainly arable land and if the river has lowered its course into the morphology. The hydrological consequences are described exemplarily for each land-use trend with a historical flood event. The interpretation of the hydrographs does not allow global statements about the influence of land-use. The study demonstrates the significance of land-use pattern for the natural processes in the landscape and underlines the necessity of spatially explicit modelling for landscape ecological questions at the mesoscale.

For the past three decades, biologists and geographers have increasingly incorporated geographical information systems to inventory and analyze spatially organized data. The proliferation of computational tools and models for visualizing, processing, and quantifying landscape patterns has continued sometimes without thorough scrutiny and scientific understanding of their benefits and limitations. The purpose of this study was to evaluate the structure and accuracy of the ecological modeling program Land Change Modeler for ArcGIS (LCM) and its analytical methods. A case study rich in land use change at Crab Orchard National Wildlife Refuge was used to focus on the program's ability to utilize imagery at multiple levels of spatial resolution and to quantify landscape change. The case study evaluated the LCM module on three primary criteria 1) inputs and outputs, 2) the impacts of scale and resolution in terms of proposed analytical methods, and 3) program structure, simplicity, flexibility, and function definitions. The study revealed that the module based structure of LCM demands specific inputs which allow for the assessment of landscape change, habitat, and biodiversity. But, the program is difficult to navigate and requires prior knowledge of analytical methods. The study also showed that the appropriate utilization of ecological computational programs should be based upon fundamental concepts of landscape ecology, the intended use of the outputs, and the prior knowledge of the user.

As ações humanas têm sido reconhecidas como as principais forças geradoras de impactos ambientais. Dentre essas ações ressaltam-se as mudanças de uso e cobertura da terra, as quais têm contribuído significativamente para a degradação e/ou conservação de ecossistemas e recursos naturais. Desse modo, devido à necessidade de assegurar um ambiente ecologicamente equilibrado para a população humana, a gestão ambiental pública (GAP) vem se desenvolvendo cada vez mais no Brasil. Esta recorre frequentemente aos conhecimentos técnicos e científicos para construir formas de gerir o ambiente. Entre estes, destacam-se os relacionados à Ecologia da Paisagem, com diversos trabalhos realizados na região onde se realizou a presente pesquisa (Bacia do Rio Corumbataí, SP). No entanto, ao basear-se somente nesses conhecimentos a GAP pode estar desconsiderando outra importante forma de gestão ambiental (GA), a gestão ambiental local (GAL). GAL é a gestão ambiental praticada por grupos familiares de pequenos produtores rurais e populações locais, em suas práticas cotidianas. A GAL está relacionada ao uso de recursos naturais em busca da sobrevivência (manutenção e reprodução física e cultural), incluindo maior ou menor inserção no mercado, e seu impacto ambiental. A desconsideração da GAL pela GAP pode comprometer a efetividade desta última e acarretar conflitos socioambientais. Sendo assim, visando gerar subsídios para adequação entre GAP e GAL, em Ipeúna, SP, esta pesquisa teve os seguintes objetivos: caracterizar a GAL realizada por proprietários rurais de Ipeúna, SP; comparar as decisões, principalmente sobre o uso da terra (e recursos associados), desse nível de gestão (GAL) com as formas de GAP mais presentes no cotidiano dos proprietários rurais; verificar se alguma dessas formas de GAP está fundamentada em princípios da Ecologia da Paisagem; e comparar a visão dos pequenos produtores rurais e da Ecologia da Paisagem sobre o processo de fragmentação florestal no município de Ipeúna, SP. A GAL praticada pelos proprietários rurais de Ipeúna, SP, foi analisada sob uma perspectiva histórica. Observou-se que aquela se modificou em função do processo de industrialização da agricultura no Brasil. As decisões sobre o uso da terra tomadas pelos pequenos produtores rurais integrantes dessa pesquisa foram guiadas principalmente por aspectos econômicos. As formas de GAP mais presentes no cotidiano daqueles produtores foram do tipo comando e controle, elaboradas para serem aplicadas em grandes territórios como o Estado de São Paulo e no País todo. O conhecimento científico teve importante papel em pelo menos alguma etapa da elaboração, construção e aplicação dessas formas de GAP. Nenhuma delas foi elaborada considerando o contexto e a GAL praticada na área estudada. Com relação à Ecologia da Paisagem, nenhuma forma de GAP mencionada pelos produtores rurais que fizeram parte desta pesquisa foi elaborada com base em suas recomendações. A visão dos produtores integrantes desta pesquisa e da Ecologia da Paisagem com relação ao processo de fragmentação florestal apresentou complementaridades. Estas complementaridades podem ser úteis para a construção de formas de GA mais condizentes com a realidade local e, portanto, mais eficazes para a conservação ambiental e equidade social.
Human actions have been recognized as the main driving forces of environmental impacts. Among these actions, the land use/cover changes have been contributed significantly to the degradation and/or conservation of ecosystems and natural resources. Due to the need of assuring an ecologically balanced environment to the human population, the public environmental management (PEM) has been developing increasingly in Brazil. The PEM has often used technical and scientific knowledge to build forms of environmental management. Among these technical and scientific knowledge, we highlight those related to Landscape Ecology, with several researches performed in the region where the present study took place (Corumbataí River Basin, SP). However, by relying only on this kind of knowledge the PEM could take apart another important form of environmental management (EM), the local environmental management (LEM). The LEM is the environmental management practiced daily by small farmers families and local people. The LEM concerns to the use of natural resources in order to achieve their social and cultural reproduction in a specific place. The LEM includes more or less market insertion and its impacts on the environment. When the PEM do not consider the LEM, the effectiveness of PEM can decrease and cause social and environmental conflicts. Therefore, in order to generate subsidies for coordinating LEM and PEM in Ipeúna, SP, this study had the following aims: to characterize the LEM practiced by farmers in Ipeúna, SP; to compare the decisions, mainly about the land use (and associated resources), taken in this management level (LEM) to the more common types of PEM in the small farmers routines; to verify if the PEM mentioned by the small farmers is based on principles of Landscape Ecology, and to compare their and the Landscape Ecology views about the process of forest fragmentation in Ipeúna, SP. The LEM practiced by farmers in Ipeúna, SP, was analyzed from a historical perspective. It was observed that the LEM has changed due to the process of agriculture industrialization in Brazil. Mainly economics aspects guided the small farmers land use decisions. The more frequent PEM forms in the daily life of small farmers were command and control type. This type of PEM was designed to large areas such as São Paulo and all over Brazil. Scientific knowledge played an important role in some parts of PEM elaboration, construction and application forms. None of the PEM identified by the small farmers have been developed considering the context and the LEM practiced in the area. About the Landscape Ecology, none of PEM forms mentioned by small farmers was developed based on its prescriptions. The view of the small farmers who integrated this research and of the Landscape Ecology related to the process of forest fragmentation showed complementarities. Such complementarities could be useful to the building of more consistent to the local reality and so, more effective to the environmental conservation and social equality.

Since the second half of the 20th century, an expansion of the forest in European mountain areas due to agricultural abandonment has been observed. The reduction of the agricultural intensity implies the disappearance of semi-natural alpine meadows and pastures of great ecological and aesthetic value. This thesis proposes a computational model, using P systems, to simulate the future agricultural landscape evolution in the Catalan Pyrenees and in the Stubai Valley, located in central Alps, for a period of 30 years. In these regions, three simulated scenarios have been established: (1) Continuation of the observed farming trends, or maintenance of the status quo, (2) significant and (3) strong stocking rate reductions. The results show how the traditional agricultural surfaces decrease in all simulated scenarios in both study areas. Therefore, it is important to apply new strategies to preserve these cultural surfaces and the multiple ecosystem services for future generations before they disappear definitively.
D'ençà de la segona meitat del segle XX s'ha observat una expansió del bosc a les zones de muntanya europees, originada per l'abandonament de l'agricultura. La reducció de la intensitat agrícola comporta la desaparició de prats i pastures alpins seminaturals de gran valor ecològic i estètic. Aquesta tesi proposa un model computacional utilitzant P sistemes per simular l'evolució futura del paisatge agrícola als Pirineus catalans i a la Vall de Stubai, situada als Alps centrals, durant un període de 30 anys. En aquestes regions s'han establert tres escenaris a simular: (1) continuació de la tendència ramadera observada, o manteniment del statu quo, (2) reducció significativa i (3) molt forta de la càrrega ramadera. Els resultats obtinguts mostren com la superfície agrícola tradicional es redueix en tots els escenaris simulats en ambdues àrees d'estudi. Per tant, és important aplicar noves estratègies per preservar aquestes superfícies culturals i els múltiples serveis de l'ecosistema per a les futures generacions, abans que desapareguin definitivament.
Desde la segunda mitad del siglo XX se ha observado un expansión del bosque en las zonas de montaña europeas, originada por el abandono de la agricultura. La reducción de la intensidad agrícola implica la desaparición de prados y pastos alpinos seminaturales de gran valor ecológico y estético. Esta tesis propone un modelo computacional utilizando P sistemas para simular la evolución futura del paisaje agrícola en los Pirineos catalanes y en el Valle de Stubai, situado en los Alpes centrales, durante un periodo de 30 años. En estas regiones se han establecido tres escenarios a simular: (1) continuación de la tendencia ganadera observada, o mantenimiento del statu quo, (2) reducción significativa y (3) muy fuerte de la carga ganadera. Los resultados obtenidos muestran como la superficie agrícola tradicional se reduce en todos los escenarios simulados en las dos áreas de estudio. Por lo tanto, es importante aplicar nuevas estrategias para preservar estas superficies culturales y los múltiples servicios del ecosistema para las futuras generaciones, antes de que desaparezcan definitivamente.

Transitional land uses produced through urbanisation continue to change the landscape and fragment ecological structures including green spaces across Europe (Nilsson et al., 2013). Green spaces offer significant benefits to humans, contributing to wellbeing and life satisfaction (Taylor, 2002). The understanding of how these unique green spaces spaces function and provide benefits to humans, and how landscape change in peri-urban contexts affects their performance, is important. The scope of this research is to contribute to an understanding of landscape fragmentation within some of Europe's polycentric urban regions, their peri-urban green spaces, and the associated impacts upon human quality of life. Two urban regional case studies, Paisley near Glasgow, Scotland, and Vantaa, near Helsinki, Finland were analysed and compared. The results indicate that humans interacting with more physically or ecologically fragmented peri-urban green spaces have higher self-reported life satisfaction levels. Though no statistically significant characteristics were apparent between life satisfaction and fragmented green space characteristics, this research was able to identify those specific structural attributes and physical characteristics of interstitial peri-urban green spaces within a polycentric region in a fragmented state that contribute to the physical, social, and psychological aspects of human wellbeing. The statistically significant eco-spatial characteristics of polycentric peri-urban interstitial green spaces that are reported to impact human wellbeing are the size, proximity, maintenance and management, and the level of greenness within its vegetation composition and setting. Overall, a spatially diverse, fragmented, peri-urban landscape whose green spaces are extensively sized, naturalistically shaped with horizontal vegetation and normal sized edges, most often parks or woodlands or forests which are integrated and physically connected to another green space which is moderately clean and somewhat safe as well as being located close to or adjacent to a heavy-trafficked road provide the most human wellbeing benefits.

This thesis is concerned with the changes to a forest landscape, that of St. Leonard's Forest, Horsham, West Sussex, changes that were wrought by human activity over two and half centuries. In order to uncover and understand these changes the author has focused on five private estates within the Forest core, Holmbush, Buchan Hill, St. Leonard's, Coolhurst and Leonardslee, and two villages in the Forest, Colgate and Lower Beeding. The five estates are considered with regard to ownership and control, land use and workers on the estates. The two villages are examined for their growth, the profile of the population, poverty and wealth. The establishment and endowments of the parish churches are outlined along with the development of the parish of Lower Beeding and its ties to Magdalen College, Oxford. Paternalism was a theme in the Victorian and Edwardian period, and the 1900 Footpath Dispute demonstrated a move away from these attitudes towards a more individualistic concern with private property rights. For the first time this study pulls together the numerous and complex strands which make up the landscape history of St. Leonard's Forest. It explores the factors both social and economic which impacted on the Forest. The juxtaposition of the nearby expanding market town of Horsham with its large common, improving communications, sales of land, and the attitudes of individual Forest landowners all combined to transform the Forest from a wild barren heathland in 1750 to a place of desirable picturesque estates and expanding villages by 1914, before the impact of the Great War was to change the Forest landscape yet again.

This thesis explores the forces of change in lives and landscapes that have altered the Lamosangu-to-Everest route in northeastern Nepal and shows how a transect in photographs and conversations across the east-central Himalaya allows us insight and a greater understanding into the processes and consequences of this change. Three forces of change over the last twenty-five years dominated discussions with local informants: the rise of the "People's War"-Nepal's Maoist Insurgency beginning in 1996; the Democratic Revolution of 1990; and dependence on tourism for livelihood after the establishment of Sagarmatha National Park in 1976. Understanding the cultural-historical context for these forces is necessary to understand the concerns of today's residents living along the Lamosangu-to-Mount Everest Base Camp transect. The visual and ethnographic evidence discussed in this thesis takes a larger role than strict analysis of conspicuous large-scale land use change and I hope the comparative 200 I images will be used as benchmarks for future research as well as for further exploration into the ways people and place have been represented.

Politische und sozioökonomische Rahmenbedingungen haben entscheidenden Einfluss auf Landnutzungswandel; die relative Bedeutung dieser Faktoren untereinander ist jedoch oftmals unklar. Ziel dieser Arbeit ist es, durch die Untersuchung der Auswirkungen der politischen und sozioökonomischen Transformation auf Landnutzungswandel in Osteuropa zu einem besseren Verständnis solcher übergreifenden Einflussfaktoren beizutragen. Am Beispiel des Dreiländerecks Polen-Slowakei-Ukraine in den Karpaten wurden hierzu grenzüberschreitende Landschaftsvergleiche durchgeführt, da solche Vergleiche die Entkopplung der Faktoren allgemeiner Landnutzungstrends von Faktoren länderspezifischer Veränderungen ermöglichen. Darüber hinaus sind die Auswirkungen postsozialistischen Landschaftswandels auf die Karpaten, einem Gebiet mit einzigartigem ökologischen Wert, bisher weitestgehend unerforscht. Mit Hilfe von Landsat TM/ETM+ Satellitendaten aus dem Jahr 2000 wurden rezente Landschaftsunterschiede zwischen Ländern quantifiziert. Auf der Basis von Bildern von 1986-2000 wurde anschliessend überprüft, ob Länderunterschiede auf sozialistischen oder post-sozialistischen Landschaftswandel zurückführbar sind. Die Ergebnisse dieser Analysen zeigten weit verbreiteten Landnutzungswandel nach 1989 als Folge von sich verschlechternden wirtschaftlichen Bedingungen, geschwächten Institutionen und gesellschaftlichem Wandel. Die Länder unterschieden sich jedoch auch deutlich hinsichtlich Forstveränderungen, Brachfallung und Parzellierung von Ackerland. Diese Unterschiede lassen sich durch verschiedene Besitzverhältnisse, Bewirtschaftungsformen und Landreformen erklären. Während sich Polen und die Slowakei landschaftlich seit 1989 annähern, entfernt sich die Ukraine zunehmend. Diese Arbeit unterstreicht die Bedeutung ökonomischer und institutioneller Veränderungen für Landschaftswandel und zeigt, wie unterschiedliche Besitzstrukturen und Landreformen Landschaftswandel beeinflussen.
Broad-scale political and socio-economic conditions are powerful determinants of land use change. Yet, their relative importance is unclear. The main goal of this thesis was to increase the understanding of such broad-scale drivers of land use change by studying how Eastern Europe’s landscapes were affected by the political and socio-economic transition after the fall of the Iron Curtain in 1989. The border triangle of Poland, Slovakia, and Ukraine in the Carpathians was selected as a study area, because cross-border comparisons of land use change allow for decoupling overall trends in the transition period from country specific changes. Moreover, the Carpathians are of exceptional ecological value, but little is known about land use effects on these ecosystems after 1989. Post-socialist land use change was quantified based on Landsat TM/ETM+ images by (1) comparing contemporary (year 2000) landscapes among countries, and (2) using images from 1986 to 2000 to investigate whether differences originated from socialist or post-socialist land use change. Results indicated that forest change, farmland abandonment, and farmland parcelization were widespread in the transition period, likely due to worsening economic conditions, weakened institutions, and societal change. However, land use trends also differed strongly among the three countries due to dissimilar land ownership patterns, land management practices, and land reforms. Poland and Slovakia converged in the transition period in terms of land cover, while Ukraine clearly diverged. This thesis provided compelling evidence of the importance of economic and institutional change for land use change and underpinned the pivotal role of ownership patterns and land management policies. These factors were important to understand land use change in Eastern Europe, and they are likely equally important elsewhere.

In the early 2000’s scientists noticed an increase in biomass production in the Sahel for the period 1982-2002 (a process which is referred to as ‘greening’). The goal of this thesis was to investigate the greening phenomenon at the local scale in 4 villages in south-central Niger and compare results of the investigation with the already available regional scale studies. Theoretical starting points for this study were: the micro-macro scale paradox in the Sahelian studies and the critical research about ‘received wisdoms’ and environmental narratives of African landscapes. Methods for this study were: visual interpretation of remote sensing data (aerial photographs and satellite images) and collection of farmers’ knowledge during a fieldtrip (PRA and personal interviews). This study identified that greening was not a uniform or strong process in four villages. Greening primarily concerned appearance of new trees, whereas big old trees continued to disappear. Not only rainfall was a reason behind greening, but also human factor played a substantial role. The greening phenomenon should be investigated critically, as far as its meaning for the affected land users is not clear.

This dissertation is an examination of the validity and potential of a series of documents known as feet of fines. It represents the analysis of data gathered from over 5000 original, medieval fines at the Public Record Office in Kew. Computer technology, notably Geographical Information Systems (GIS) and databases, has been utilized in the analysis. This has led to the production of a series of tables, graphs and maps for the chosen study area: the counties of Herefordshire, Shropshire and Gloucestershire. The research has enabled a comparative study of land use and settlement patterns and has revealed that fines are an excellent source for the study of certain themes, such as the period of the "crisis" of the early fourteenth century and the plotting of the course of the advance of pasture in the later medieval period. The origins of feet of fines are examined along with their development, their structure and content. Their value as a source for the historian and the historical-geographer has been assessed and the data has been used for the study of the three counties in question. A regional study of each county has been undertaken along with a general examination of land use and settlement patterns. This is followed by an assessment of how feet of fines can be used to enhance this pattern for the period 1196-1509. All three county studies include a series of tables and graphs produced from the database of fines and maps produced from Unking these databases to a GIS digital mapping system. The conclusion highlights the differences in land use and settlement patterns in the three counties and includes comparisons between the three studies.

Land use and cover change (LUCC) is increasingly recognised as one of the most visible impacts of humans on nature. In rural areas, most of the observed LUCC is associated with agricultural activities. This has traditionally been attributed to the interplay of the socio-economic and political milieu, and the opportunities and constraints arising from the climatic conditions and physical attributes of land. Although there is no doubt that these factors influence farmer decisions, the mosaic of farming systems suggests that farmers do not always behave uniformly, even in areas with comparable socio-economic and environmental conditions. While the multi-facetted and varying nature of farmer decision-making is considered to be established knowledge in rural sociology, it is often neglected in LUCC models that typically describe it as homogeneous and rational in economic terms. This thesis presents an application of mixed-method social survey which aims at improving the representation of the diversity and complexity of farmer decision-making process in LUCC models. Different data collection methods (in-depth, semi-structured interviews, questionnaire) and analyses (thematic analysis, principal components analysis, cluster analysis, choice-based conjoint analysis) were used complementarily to identify the factors that facilitate or constrain farmer participation in environmental management practices (a), to identify the dominant farmer profiles (b) and to assess farmer preferences that influence land use decisions (c). Data collection was conducted in a study area located in the Canton of Aargau, Switzerland, where there is limited knowledge about farmer decision-making drivers and actions. Research findings were used to empirically inform an agent-based model that simulates farmer decisions. Paremeterised storylines were used to explore farmer decisions in alternative futures. An advanced and context-specific representation of human agents in modeling frameworks can make LUCC models valuable tools both for landscape analysis and policy making. In the face of new policy reforms, this thesis contributes to the achievement of this objective, by presenting an approach to explore and organize the heterogeneity of farmer behaviour and to make this usable in agent-based modeling frameworks.

Includes bibliographical references.
The study of land use change and urban morphology requires a multi-layered approach. Case studies are needed to gain an understanding of the local factors that are driving land use change and forming urban landscapes. This study will provide a temporal perspective on land use change in the Constantia Valley, a high income suburb on the outskirts of Cape Town. It will contextualise the efforts to conserve its heritage and, furthermore, attempt to explain the factors underlying the observed changes in the urban form. This study, through the use of Geographic Information System (GIS) mapping and a series of interviews, examines how and why the urban form of the Constantia Valley has changed. Finally, based on the findings the possible future urban form of Constantia will be considered.

Understanding the impacts of land-use change on biodiversity and the ecosystem services that it provides is of great importance given unprecedented growth of the human population. Past studies attempting to explore these impacts have described the overall structure of communities (i.e. species richness and trait diversity) across gradients of local scale degradation and fragmentation, and have sought to identify whether the loss of species following land-use change is non-random. Yet, despite a wealth of research we still lack a generalised understanding of how land-use change impacts on traits responsible for determining species sensitivity and their role within ecosystems, particularly for vertebrates. Moreover, despite the importance of niche-based processes in the assembly of communities, we have not yet elucidated whether these are important in mediating the collapse of communities in human-dominated landscapes. To fill these existing research gaps, I collated comprehensive avian species inventories from fragmented and degraded forests and compared their structure with communities existing in continuous forests. In Chapter 2, I tested whether sensitivity of species to forest fragmentation varies between the temperate zone and the tropics and whether there are key differences in the size of fragments required to maintain ecosystem processes in these regions. I found that sensitivity to fragmentation varies according to functional group and body mass, with the prevalence of insectivores and large frugivores declining in relation to fragment size, particularly in tropical fragments smaller than 100 ha. In Chapter 3, I tested whether functional diversity and the mean position of trait diversity of insectivores and frugivores, changed across a gradient of intensifying land-use change. I found a decline in the functional diversity of forest species and a shift in the mean community traits for both forest and non-forest species. In Chapter 4, I tested whether the structure of tropical bird communities are influenced by species interactions in a fragmented landscape. I found increasing over-dispersion in functional and phylogenetic trait relatedness among species with decreasing fragment size, suggesting that competitive interactions are important in the disassembly of avian communities. In Chapter 5, I modelled the impact of forest cover change on ecosystem function across the Brazilian Amazon, focusing on seed dispersal by birds. Furthermore, I tested whether ecosystem function declined linearly with decreased forest cover after accounting for differences in the underlying pools of species. I found the lowest levels of functional diversity along the southern arc of deforestation and that the dispersal of large seeds showed some resilience to declining forest cover. Taken together, my results suggest that the loss of species from communities in degraded and fragmented landscapes is strongly non-random. Insectivores and large frugivores are most sensitive to land-use change, with species located in the densest parts of trait space being most threatened by a decline in forest patch size, suggesting that species interactions regulate the collapse of avian diversity in human-modified forests. I conclude that land-use change has important implications for the provisioning of ecosystem services, including seed dispersal and the control of insect herbivores. The impact of future land-use change is likely to be mediated by the composition of the original pool of species and the amount of redundancy in the ecosystem services that they provide. I discuss the relevance of my findings to land-use management strategies and policy interventions, and in particular conclude that these should, where possible, maintain pristine forest patches above 1000 ha, improve connectivity among habitat patches, and ensure greater protection for logged and burnt forests. Future studies should focus on clarifying the link between shifts in vertebrate community structure and the functioning of forest ecosystems.

One billion people currently live in basins that are likely to require action to address climate change-induced water stress. Rather than blaming dwindling resource availability as the key culprit for this global water crisis, the United Nations has dubbed the water crisis a "crisis in governance." One of the key prescriptions promoted by multilateral funders and international water experts for addressing the looming crisis has been water policy reform that follows the principles of Integrated Water Resource Management (IWRM). While there has been significant research on the IWRM model, few people have conducted empirical studies that examine how IWRM water reform generates changes within the agricultural sector. It is particularly important to study the tight coupling of agricultural and water policy in light of a changing climate, which poses substantial challenges to water availability and agricultural production. In this thesis, I explore the salient case study of the Piura River Basin in northern Peru. I employ semi-structured interviews with key institutional actors in the agricultural and water sector, participant observation, and technical document review to examine how the IWRM-based 2009 Water Resources Law is reshaping agricultural land use under climate change and globalization pressures. I argue that 2009 Water Resources Law formalized and limited public participation within the newly formed river basin council, while concurrently strengthening technocratic water allocation institutions that limit the agency of smallholder water users to make agricultural land use decisions. Additionally, I find that climate change adaptation discourse is being operationalized within river basin council to legitimize these reforms, but these reforms are explicitly enrolled in agricultural development policy aimed at converting traditional agricultural systems to export-oriented production. This study contributes to the fledgling scholarship on the implications of the 2009 Water Resource Law for Peruvian agricultural communities. More broadly, my findings offer insight into how IWRM reshapes the agricultural sector, how this is situated into the continually shifting role of the state, and how these policy reforms integrate and animate climate change adaptation.

Riparian systems are comprised of interacting aquatic and terrestrial elements that contribute distinctively to the natural capital of arid landscapes. Riparian vegetation is a major component of riparian systems, providing the ecosystem services required to support watershed health. The spatial and temporal distributions of riparian vegetation are influenced by hydrologic and disturbance processes operating at scales from local to regional. I believe both these processes are well suited to monitoring using synoptic and multitemporal approaches.The research in this dissertation is presented as 3 related studies. The first study focused on historical riparian dynamics related to natural disturbance and land use. Using current and historical riparian vegetation maps, we examined vegetation change within catchments of varying land use intensity. Results suggest that land use activities and wastewater subsidy affect the rate of development and diversity of riparian community typesThe second study used moderate resolution satellite imagery to monitor changes in riparian structure and pattern within a land cover change framework. We classified Landsat Thematic Mapper satellite imagery of the Upper Santa Cruz River watershed using Classification and Regression Tree (CART) models. We tested the ability of our models to capture change at landscape, floodplain, and catchment scales, centering our change detection efforts on a riparian tree die-off episode and found they can be used to describe both general landscape dynamics and disturbance-related riparian change.The third study examined historical and environmental factors contributing to spatial patterns of vegetation following two riparian tree die-offs. We used high resolution aerial imagery to map locations of individual live and dead trees and collected a suite of environmental variables and historical variables related directly and indirectly to land use and disturbance history. We tested for differences between groups of live and dead trees using Multi-response Permutation Procedures and found strong relationships between historical factors and mortality incidence.The results from these studies demonstrate the importance of examining historical information and spatial linkages across scales when monitoring riparian vegetation. From a land management perspective, the results identify the need for landscape-level, ecosystem-based management programs to maintain functioning and spatially connected riparian systems.

Land degradation is one of the most important drivers of landscape change around the globe. This dissertation examines land use-land cover change within a mosaic landscape in Eastern Terai, India, and shows evidence of anthropogenic factors contributing to landscape change. Land use and land cover change were examined within the Alipurduar Subdivision, a representative of the Eastern Terai landscape and the Jaldapara Wildlife Sanctuary, a protected area nested within Alipurduar through the use of multi-temporal satellite data over the past 28 years (1978 - 2006). This study establishes the potential of remote sensing technology to identify the drivers of landscape change; it provides an assessment of how regional drivers of landscape change influence the change within smaller local study extents and provides a methodology to map different types of grassland and monitor their loss within the region. The Normalized Difference Vegetation Index (NDVI) and a Normalized Difference Dry Index (NDDI) were found instrumental in change detection and the classification of different grasslands found inside the park based on their location, structure, and composition. Successful spectral segregation of different types of grasslands and their direct association with different grassland specialist species (e.g., hispid hare, hog deer, Bengal florican) clearly showed the potential of remote sensing technology to efficiently monitor these grasslands and assist in species conservation. Temporal analysis provided evidence of the loss of dense forest and grasslands within both study areas with a considerably higher rate of loss outside the protected area than inside. Results show a decline of forest from 40% in 1978 to 25% in 2006 across Alipurduar. Future trends project forest cover and grassland within Alipurduar to reduce to 15% and 5%, respectively. Within the Alipurduar, deforestation due to growth of tea industry was the primary driver of change. Flooding changed the landscape, but more intensely inside the wildlife preserve. Change of the river course inside Jaldapara during the flood of 1968 significantly altered the distribution of grassland inside the park. Unless, the direction of landscape change is altered, future trends predict growth of the tea industry within the region, increased forest loss, and homogenization of the landscape.

A large body of research has documented evidence of climate change impact already occurring on different systems on earth, future impacts can be expected. Accordingly, research is urgently needed to analyze the potential impacts of climate change on forest ecosystems in order to contribute to better landscape planning and management. This thesis investigates how climate change affects landscape change, and how to use this understanding in the analysis of land-use and landscape planning and management to adapt to climate change impacts. In particular, this study examines how climate change may impact a managed forest in terms of timber availability, and the regional community that relies on it for its survival.

I hypothesized that the Boreal forest in north western Ontario will change in the short term (i. e. 60 years) in species composition and will produce less available timber as a result of human-induced climate change as modeled by different General Circulation Models plus harvesting, compared to a baseline climate. The study objectives were (a) to evaluate the degree of change in land cover (species composition) under forest harvesting and various climate change scenarios; (b) to analyze timber availability under different climate change scenarios, and harvesting; (c) to describe possible scenarios of land cover change as a result of climate change impact and harvesting to assist in policy-making related to land-use and landscape planning; and (d) to identify possible sources of both land-use conflicts and synergies as a result of changes in landscape composition caused by climate change.

The study area was the Dog-River Matawin forest in north western Ontario (? 8 x 104 ha). It is currently under harvesting. I used the Boreal Forest Landscape Dynamic Simulator (BFOLDS) fire model to simulate landscape change under different climate change scenarios (CCSRNIES A21, CGCM2 A22), which were then compared to simulations under a baseline climate scenario (1961-1990). I also developed an algorithm for the geographic information systems Arc View©, that selected useful stands, and simulated harvesting and regeneration rules after logging, processes not currently included in BFOLDS. The studied period covered 60 years to analyze impacts in the medium term in the landscape change.

Results obtained were the following. (1) There will be a shortage in timber availability under all scenarios including the baseline. The impacts of climate change will cause a deficit in timber availability much earlier under a warmer scenario with respect to the baseline. The combined impact of climate change and harvesting could diminish timber availability up to 35% compared to the baseline by year 2040 under the CCSRNIES A21 scenario mainly due to an increase in fires. Deficits will occur 10 years before in the same scenario compared to the baseline (by year 2035). (2) In both scenarios and the baseline, there will be a younger forest. In 60 years, there will not be mature forest to support ecological, social and economic processes, as the forest will only have young stands. (3) Results obtained indicated that species composition will not change importantly among the scenarios of climate change and the baseline every decade, but there will be a change in dominance along the 60 years of the simulation under each scenario including the baseline. Softwood increased in dominance and hardwood decreased in all scenarios.

The period length used in the simulation of 60 years appeared to be too short to reveal conspicuous changes in species composition. Increases observed in softwood over hardwood related to the increase in fires which promoted the establishment of species such as jack pine as well as the application of regeneration rules after logging. This finding did not agree with the hypothesis. Results of timber availability were consistent with what I expected. Warmest climate change scenarios (CCSRNIES A21) impacted both the amount of timber available (less availability every ten years) from the beginning of the simulation and the time when deficits occurred.

There are important economic, social and environmental implications of the results of this study, namely a future forest that would be young and would supply much less timber. For the forestry industry, production goals would be hindered in the medium term, falling short of industry demands. For a society that depends heavily upon the forest to survive, declining production can imply unemployment, thus affecting the welfare of the community. For the environment, such a young, fragmented forest could be unable to sustain important key species and ecological processes, leading to a loss of biodiversity, Land-use and landscape planning should be used to regulate how the land is used to minimize climate change impact. They should be further used as adaptation tools, to help in ameliorate those climate change impacts that do occur.

This thesis investigates how the inhabitants formed the coastal landscape of northwest Estonia through both internal change and external impact by estate owners, provincial government and imperial decrees. Two villages on the largely Swedish populated Noarootsi peninsula, Einbi (Enby) and Kudani (Gutanäs), are examined in detail. The aim was to answer questions about how the local livelihoods and farming systems of coastal inhabitants changed from the late 1600s to 1940. The background of a gradual weakening of the manorial estate system from 1800 onwards and a rapid development of freehold family farming from the 1860s is important to the analysis. To examine the complex variety of factors and interactions that shape the landscape, an interdisciplinary approach to change has been used. This approach included a conceptual model for the local production unit, such as the individual farm. Information from historical maps, diverse population registers and agricultural censuses were used. The soil cover was examined with samples taken during fieldwork in the studied villages. The study shows how the development of two villages in fairly similar geographic settings differed largely due to socio-political restrictions. During feudal times, the primary changes were related to the fact that local nobility could maintain their land ownership rights and regulations for manorial deliveries and corvée duties. Changes to natural conditions, such as soil quality and land uplift, had no substantial effect on land productivity. From the 19th century, the most important factor was the legalized opportunity to purchase farms as freeholds from estates, as well as through land reforms in an independent Estonia. The traditional niche of coastal Swedish peasants, who depended on a variety of productive activities, remained in practice. As all manor land was nationalized, many new smallholdings and crofts were created based on external activities by inhabitants, such as farm day labor. Farm productivity was now increased primarily by improvement to land quality (use of artificial fertilizers and meadow drainage), and by the introduction of new implements and crops on farms consolidated from open fields.

Thesis (MA)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: The aim of this study was to investigate the nature, extent and impact of multiple land uses on the agricultural landscape in Stellenbosch as manifestation of a post-productivist mode of agricultural change. The research objectives included the provision of a thorough literature review of post-productivism; mapping the spatial distribution of farm-based activities on wine farms within the Stellenbosch area; the compilation of a land-use map of the area that will investigate the extent of multiple land-use diversification; an analysis of the locational relationship between farm-based activities and a range of land-use changes in GIS; mapping the municipal properties and land use on each; the provision of a typology of post-productivist, non-agricultural land consumption practices; and conducting a representatively sampled survey among farm owners/managers who have not followed the trend of multiple land-use practices. Data were collected from questionnaires completed by the owners of wine farms within the Stellenbosch area; by differentiating each land cover type by the changes that took place over the period 1993 to 2010; and from long-term lease agreements of Stellenbosch municipal properties and the land use of each property. An overall increase in the presentation of alternative features/facilities can be observed in the Stellenbosch area. According to the information obtained from the questionnaires, conferences and weddings seems to be the most popular alternatives to primary farming. The research findings indicate that tourism-related functions/facilities on farms lead to a much needed alternative source of income for farmers. The changes in land cover observed over time can be linked to the process of post-productivism, which is aimed primarily at minimising the harmful effects of intensive farming techniques on the environment. In cases where land cover has decreased drastically, especially plantations, these areas have been transformed into natural vegetation. The Stellenbosch Municipality is strict on compliance with policies, as failure to do so can have harmful effects on the environment. These policies include the Land Use Planning Ordinance 15 of 1985 (Western Cape, 1985); the Municipal Asset Transfer Regulations of 2008 (Western Cape, 2008); the Western Cape Provincial Spatial Development Framework of 2009 (Western Cape, 2009); the Provincial Urban Edge Guidelines of 2005; and the policy on the management of Stellenbosch Municipality’s immovable property of 2012. The municipality also is strict on the fact that the property may only be used for the purpose for which it was zoned. Failure to comply with these rules can lead to the termination of the contract between the municipality and the farmer, without any compensation from the municipality. Recommendations for future research include some development opportunities and marketing strategies for farm-based tourism; suggestions regarding the municipal responsibilities towards the commonages; as well as suggestions regarding the management of changes in rural land use change.
AFRIKAANSE OPSOMMING: Die doel van hierdie studie was om ondersoek in te stel na die aard, omvang en impak van veelvoudige grondgebruike op die landbou-landskap van Stellenbosch as ’n manifestasie van die postproduktivistiese modus van landbouverandering. Die navorsingsdoelwitte het die volgende ingesluit: die voorsiening van 'n deeglike literatuuroorsig oor postproduktivisme; kartering van die ruimtelike verspreiding van plaas-gebaseerde aktiwiteite op wynplase in die Stellenbosch-omgewing; samestelling van 'n grondgebruikskaart van die gebied wat die omvang van die diversifisering van veelvuldige grondgebruike ondersoek; analise van die liggingsverhouding tussen plaas-gebaseerde aktiwiteite en 'n verskeidenheid van grondgebruikveranderinge in GIS; kartering van die munisipale eiendomme en grondgebruik op elke eiendom; verskaffing van 'n tipologie van die postproduktivistiese, nie-landbou verbruikspraktyke; en die uitvoering van 'n verteenwoordigende opname onder plaaseienaars/bestuurders wat nie die tendens van meervoudige grondgebruike volg nie. Data is ingesamel deur middel van vraelyste wat deur eienaars van wynplase in die Stellenbosch-omgewing voltooi is; deur onderskeid te tref tussen verskillende soorte grondbedekking deur te fokus op die veranderinge wat van 1993 tot 2010 plaasgevind het; asook ’n ondersoek van langtermyn huurkontrakte van munisipale eiendomme op Stellenbosch en die grondgebruik van elke eiendom. In die Stellenbosch-omgewing was daar 'n algehele toename in die aanbieding van alternatiewe funksies/fasiliteite. Volgens die vraelyste blyk konferensies en troues die gewildste alternatief tot primêre boerdery te wees. Die navorsingsbevindinge dui daarop dat toerisme en verwante funksies/fasiliteite op plase 'n noodsaaklike alternatiewe bron van inkomste vir die boere verskaf. Die veranderinge in die grondbedekking wat oor tyd waargeneem is, kan gekoppel word aan die proses van postproduktivisme, aangesien die proses daarop fokus om die skadelike uitwerking van intensiewe boerderytegnieke op die omgewing te verminder. In gevalle waar grondbedekking drasties afgeneem het, veral van plantasies, is hierdie gebiede gewoonlik in natuurlike plantegroei omskep. Die Munisipaliteit van Stellenbosch is streng oor die nakoming van beleide, aangesien versuim ʼn skadelike uitwerking op die omgewing kan hê. Hierdie beleide sluit in die Grondgebruikbeplanning Ordonnansie 15 van 1985; Munisipale Bate Oordrag Regulasies van 2008; die Wes-Kaapse Provinsiale Ruimtelike Ontwikkelings Raamwerk van 2009; die Provinsiale ‘Stedelike Randgebied’ Riglyne van 2005; asook die beleid op die bestuur van die Stellenbosch Munisipaliteit se vaste eiendom van 2012. Die munisipaliteit is ook streng oor die feit dat eiendomme slegs gebruik mag word vir die doel waarvoor dit gesoneer is. Versuim om hieraan te voldoen kan lei tot die beëindiging van die kontrak tussen die Munisipaliteit en die boer, sonder enige vergoeding vanaf die munisipaliteit. Voorstelle vir toekomstige navorsing sluit in 'n paar ontwikkelingsgeleenthede en bemarkingstrategieë vir plaas-gebaseerde toerisme, voorstelle ten opsigte van die munisipale verantwoordelikhede teenoor meentgronde, asook voorstelle gerig op die bestuur van verandering in landelike grondgebruik.

Technical complexities and the high cost of satellite images have hindered the adoption of remote sensing technology and tools for nature conservation works in Ethiopia as in many developing countries. The terrestrial and aquatic ecosystems in Abijjata Shala Lakes National Park (ASLNP) and the Important Bird Areas (IBAs) around the park are considered to be one of the most important home ranges for birds. However, little is known about the effect of land use/land cover (LULC) dynamics, due to lack of technical know how and logistical problems. However, it has been shown in this study that sophisticated image management works are not always relevant. Instead a simple method of utilizing the thermal band has been demonstrated. A new approach of long-term dynamics analysis method has also been suggested. A successful classification of images was achieved after such simple enhancement tests. It has been discovered that, there were more active LULC change processes in the area in the first study period (1973 to 1986) than during the second study period (1986-2000). In the first period nearly half of the landscape underwent land cover change processes with more than 26% of the entire landscape experiencing forest or land degradation. In the second period the extent of the change process was limited to only 1/3 of the total area with a smaller amount of degradation processes than before. During the entire study period, agriculture was responsible for the loss of more than 4/5 of the total terrestrial productive ecosystem. More than 37.6% of the total park area has been experiencing this loss for the past 3 decades. Only 1/5 of this area has a chance to revive, the remaining has undergone a permanent degradation. Lake Abijjata lost half of its size during the past 30 years. In the Zeway-Awassa basin 750 km², 2428km² and 3575km² of terrestrial lands and water bodies are within a distance of 10km, 20km and 30km from IBAs respectively. There are ecologically important areas where two or more IBAs overlap. In areas where more than two to five IBAs overlap, up to 85km² of areas have been recently degraded. High livestock density is one of the reasons for degradation. Using a monthly MODIS data from 2000-2005 and a series of interpolation techniques, the productivity of the area as well as the standing biomass were estimated. Moreover, a new method of spatially accurate livestock density assessment was developed in this study. Only 0.3% of the park area is found to be suitable for productive livestock development but nearly all inhabitants think the area is suitable. Feed availability in ASLNP is scarce even during rainy seasons. Especially the open woodlands are subject to overgrazing. Such shortage forces the inhabitants to cut trees for charcoal making to buy animal feed and non-food consumables. While more than 95% of the inhabitants in the park expanded their agriculture lands, only 13.3% of the farmers managed to produce cereals for market. The application of low cost remote sensing and GIS methods provided ample information that enables to conclude that low productivity and household food insecurity are the main driving forces behind land cover changes that are negatively affecting the natural and semi-natural ecosystems in the central and southern Rift Valley of Ethiopia. The restoration of natural ecosystems or conservation of biodiversity can be achieved only if those driving forces are tackled sustainably.