Relevant bibliographies by topics / Plan biodiversité / Dissertations / Theses
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Dissertations / Theses on the topic 'Plan biodiversité'

Author: Grafiati
Published: 1 June 2024
Last updated: 31 July 2025

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1

Hakim, Lamia. "Les évolutions dans les opérations de logements sociaux construits à Paris entre 2007 et 2020 face aux exigences énergétiques et environnementales." Electronic Thesis or Diss., Paris 10, 2022. http://www.theses.fr/2022PA100142.

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Dans le contexte de la lutte contre le changement climatique, la réduction de la consommation énergétique des bâtiments devient une urgence. À Paris, le secteur du bâtiment représente un enjeu important quant à cet objectif. Plusieurs décisions politiques ont été adoptées afin de réduire les consommations d’énergie et de protéger l’environnement. Parmi ces engagements, figurent le Plan Climat de la Ville de Paris et le Plan Biodiversité. L’objet de cette thèse est d’examiner les transformations que les impératifs environnementaux et les exigences énergétiques liés notamment à ces plans ont ent
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Zupan, Laure. "Au-delà des espèces, comment protéger simultanément l'histoire évolutive, le fonctionnement des écosystèmes et les services procurés par la nature." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV063/document.

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La biodiversité est définie comme la variété et la variabilité du monde vivant sous toutes ses formes. Elle est souvent appréhendée par la richesse en espèces. Pourtant il existe d'autres « facettes » de la biodiversité (telles que la diversité phylogénétique et fonctionnelle) qui sont à considérer pour comprendre la plupart des processus évolutifs et écologiques. Aujourd'hui, la prise en compte de ces différentes facettes ainsi que les services des écosystèmes –bénéfices que les humains retirent directement des écosystèmes – sont au cœur de l'agenda européen de la conservation. Cependant pour
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3

Chan, Tin-yau, and 陳天佑. "Hong Kong biodiversity museum." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B3198194X.

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4

Akhani, Hossein. "Plant biodiversity of Golestan National Park, Iran /." Linz : Biologiezentrum des OÖ. Landesmuseum, 1998. http://www.gbv.de/dms/bs/toc/246607068.pdf.

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5

Duhamet, Agnès. "De l’ADN environnemental jusqu’aux plans de conservation pour les poissons côtiers méditerranéens." Electronic Thesis or Diss., Université de Montpellier (2022-....), 2023. http://www.theses.fr/2023UMONG031.

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Les communautés de poissons marins, essentielles au bon fonctionnement des écosystèmes, sont de plus en plus menacées par les pressions humaines : surpêche, dégradation des habitats, pollutions et changement climatique. Dans ce contexte, des réserves marines sont mises en place pour tenter de les protéger. Afin de mieux orienter la protection des espèces, notamment les plus vulnérables, il faut mieux connaître leur répartition spatiale et bathymétrique, mais aussi leur niveau de coexistence avec les pressions humaines. L’obtention de ces données est difficile avec les outils classiques tels qu
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Joyce, Christopher Brian. "Management of European floodplain grasslands for plant biodiversity." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/6988.

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European floodplain grasslands are characterized by periodic flooding and regular management, usually cutting and grazing as part of an agricultural system. Past losses and ecological degradation have been due largely to river regulation and either agricultural intensification or abandonment and have resulted in a substantial reduction in area across Europe. Nevertheless, the remaining resource supports considerable biodiversity and a high level of biological production. A better quantitative understanding of the functioning of these grasslands is required in order to establish effective conse
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7

Laycock, Helen Fiona. "Evaluating the effectiveness and efficiency of conservation : the UK biodiversity action plan." Thesis, University of York, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495887.

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8

Ali, Nadine. "Communautés de nématodes phytoparasites associés à l'olivier : réponse aux forçages anthropiques et environnementaux." Electronic Thesis or Diss., Montpellier, SupAgro, 2015. http://www.theses.fr/2015NSAM0015.

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Les interventions humaines de plus en plus fréquentes et persistantes dans les écosystèmes d'une part, et l'intensification des systèmes de cultures d'autre part qui s'accompagne pour partie de méthodes radicales pour combattre les bio-agresseurs des cultures, nous posent de multiples questions au sujet des risques écologiques liés aux changements des milieux, dont les perturbations induites sur les communautés d'organismes vivants. Les nématodes phytoparasites (NPP), vers ronds microscopiques telluriques qui occasionnent des pertes de production végétale importantes, sont partout présents en
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9

Ingwersen, Sarah. "Biodiversity and forest management, five forest management plans evaluated." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ60848.pdf.

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10

Van, Mechelen Carmen. "Nature as a template for a new concept of extensive green roofs." Thesis, Avignon, 2015. http://www.theses.fr/2015AVIG0334/document.

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Au cours de notre ère dite « Anthropocène » et caractérisée par l’urbanisation, la biodiversité est fortement contrainte. Il s’agit d’un problème important car elle est considérée comme le principal moteur du fonctionnement des écosystèmes et comme une source de services écosystémiques. Les toits verts sont un exemple de nouveaux écosystèmes au sein de l’environnement urbain. Ils constituent de nouveaux habitats et peuvent alors limiter la perte de biodiversité en ville. Ils offrent de plus d’autres services écosystémiques comme la régulation thermique, la gestion des eaux pluviales, ainsi qu’
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11

Burton, Hazel M. C. "Conservation ecology of biodiversity action plan listed reed beetles of the genus 'Donacia'." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421726.

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12

Schulz-Burgdorf, Ulrich. "Habari za miti na mitishamba miongoni mwa Wamijikenda na Waswahili-matokeo ya kwanza kutoka utafiti." Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-98191.

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Utafiti ambao ni msingi wa habari hizo umefanywa katika miezi za Oktoba mpaka Disemba 2000 katika wilaya wa Kwale na Kilifi huko nchi ya Kenya. Wanachama wa timu ya utafiti wetu walikuwa Prof. F. Rottland, ambaye aliweka taratibu msamiati wa miti uliokusanywa, na Bw. Mohamed Pakia ambaye ni mwanabiolojia na aliyehojiana wanafunzi wa shule ya sekondari kuhusu ujuzi wa miti na mitishamba wao. Bw. Pakia ameshafanya kazi katika Coastal Forest Conservation Unit, yaani watu ambao husaidia wazee wa kimijikenda katika kuhifadhi misitu mitakatifu inayoitwa \"makaya\" na inatumiwa kwa matambiko na kama
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Smith, Ross L. "Invasive alien plant species of The Bahamas and biodiversity management." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1275062320.

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14

Perron, Mary Ann. "The Value of Urban Ponds for Odonata and Plant Biodiversity." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40522.

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Urbanization involves the conversion of natural areas to impervious surfaces, which can lead to an increase in the frequency and severity of flood events in cities. To mitigate flood risk, stormwater ponds are constructed to manage urban runoff. Stormwater ponds can also be colonized by wildlife, but their suitability as habitat is disputed due to potential toxicological risks. This study assessed the suitability of stormwater ponds as habitat for the bioindicators Odonata (dragonflies and damselflies) and determined environmental factors that impact their community structure. Odonata (adults,
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15

Ali, Nadine. "Communautés de nématodes phytoparasites associés à l'olivier : réponse aux forçages anthropiques et environnementaux." Thesis, Montpellier, SupAgro, 2015. http://www.theses.fr/2015NSAM0015/document.

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Les interventions humaines de plus en plus fréquentes et persistantes dans les écosystèmes d'une part, et l'intensification des systèmes de cultures d'autre part qui s'accompagne pour partie de méthodes radicales pour combattre les bio-agresseurs des cultures, nous posent de multiples questions au sujet des risques écologiques liés aux changements des milieux, dont les perturbations induites sur les communautés d'organismes vivants. Les nématodes phytoparasites (NPP), vers ronds microscopiques telluriques qui occasionnent des pertes de production végétale importantes, sont partout présents en
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16

Van, der Vyver Marius Lodewyk. "Restoring the biodiversity of canopy species within degraded spekboom thicket." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1564.

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I investigated the return of plant canopy diversity to degraded spekboom thicket landscapes under restoration treatment. I attempted the reintroduction of five nursery propagated and naturally-occurring plant species in severely degraded Portulacaria afra Jacq. (spekboom) dominated thickets that have been subjected to a restoration method involving the planting of dense rows of P. afra truncheons for various time periods and also in degraded and intact thickets. I also planted nursery propagated P. afra cuttings. An average of 30 propagules of each species, were planted in each of the chosen a
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17

Schmidtke, Andrea. "Biodiversity effects on the performance of terrestrial plant and phytoplankton communities." Phd thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3893/.

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Die Ökosysteme unserer Erde sind durch das rasante Artensterben infolge von Umweltveränderungen durch den Menschen und des globalen Klimawandels stark betroffen. Mit den Auswirkungen dieses Artenverlustes und der damit einhergehenden Veränderung der Diversität beschäftigt sich die heutige Biodiversitätsforschung. Spezieller wird der Effekt der Diversität auf Ökosystemprozesse wie beispielsweise den Biomasseaufbau von Primärproduzenten oder der Resistenz einer Gemeinschaft gegen die Einwanderung neuer Arten untersucht. Die Quantifizierung des Einflusses der Diversität auf die Primärproduktion u
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18

Oikawa, Junko. "Future role of living plant collections in gardens for biodiversity conservation." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314314.

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19

Harper, Leah Wheelbarger. "Plant Biodiversity across Three Successional Stages in Forests of Southern Illinois." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/theses/2794.

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Since the time of European settlement, land-use history, management practices, the introduction of non-native invasive species (NNIS), and climate change have dramatically changed the successional pathways of Southern Illinois forests. Biodiversity is considered essential for ecosystem health and resiliency, so understanding the impact theses forest changes have on biodiversity is necessary to guide future management decisions. This study was conducted at Touch of Nature Environmental Center (TONEC) in Southern Illinois using the Shannon diversity index (H') to compare the levels of biodiver
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20

Neloy, Md Naim Ud Dwla. "Validation of theoritical approach to measure biodiversity using plant species data." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19431.

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Measuring Biodiversity is an important phenomenon to serve best to our ecology and also keep environment sound. Variety of life on different levels, like an ecosystem, life forms on a site, landscape collectively known as Biodiversity. Species richness and evenness combine measures as Biodiversity. Separate formula, index, equation are widely using to measure Biodiversity in each level. Swedish Environmental Protection Agency aimed to establish an index that consists of landscape functionality and landscape heterogeneity. For landscape functionality assessment, there BBCI (Biotope biodiversity
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21

Imran, Hafiz Ali. "Remote Sensing Tools for Monitoring Grassland Plant Leaf Traits and Biodiversity." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/329592.

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Grasslands are one of the most important ecosystems on Earth, covering approximately one-third of the Earth’s surface. Grassland biodiversity is important as many services provided by such ecosystems are crucial for the human economy and well-being. Given the importance of grasslands ecosystems, in recent years research has been carried out on the potential to monitor them with novel remote sensing techniques. Improved detectors technology and novel sensors providing fine-scale hyperspectral imagery have been enabling new methods to monitor plant traits (PTs) and biodiversity. The aims of the
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22

Rai, Upkar. "Characterisation of plant biodiversity in darjiling hills using remote sensing techniques." Thesis, University of North Bengal, 2006. http://hdl.handle.net/123456789/843.

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23

Knapp, Sonja. "Plant biodiversity in urbanized areas analyses of plant functional traits in space and time, plant rarity and phylogenetic diversity." Wiesbaden Vieweg + Teubner, 2009. http://d-nb.info/995192685/04.

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24

Achour, Rim. "Innovation végétale et propriété intellectuelle : approche dialectique du droit et de la science." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE3072.

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Variété végétale et invention sont deux concepts juridiques qui encadrent la propriété intellectuelle des innovations variétales. Ces deux constructions juridiques sont en continuité avec les préceptes scientifiques de la biologie. En outre, elles sont adaptées aux besoins économiques des acteurs concernés. Ces deux éléments montrent que la relation entre le droit de la propriété intellectuelle et le contexte de la création variétale est construite sur un échange dialectique. Le choix du droit de la propriété intellectuelle dépend des intérêts que les sélectionneurs souhaitent fructifier. La c
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Brandt, Erika. "Relating Plant Spatial Pattern, Plant Biodiversity, and Ecosystem Function to Management Practices in Experimental Restored Wetlands." Oberlin College Honors Theses / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1368092195.

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26

Wilson, Frederick. "Factors affecting the species richness of old permanent semi-natural grasslands in North-East Scotland." Thesis, University of Aberdeen, 2003. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU173020.

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The successful management for conservation and restoration of semi-natural ecosystems may be achieved only after the factors which regulate plant biodiversity and species composition have been identified. This study investigates the floristic composition and site characteristics of old permanent semi-natural grasslands in North-east Scotland and tests using pot and field experiments the role of soil fertility in determining vascular plant species richness, relative abundance and dynamics of communities. Results from field surveys show that, of the site characteristics quantified, vascular plan
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Bigirimana, Joseph. "Urban plant diversity patterns, processes and conservation value in Sub-Saharan Africa: case of Bujumbura in Burundi." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209636.

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This study focuses on the vegetation of the African city of Bujumbura, Burundi. Urban flora is detailed according to the origin of the species (native or introduced), their life form, the use of these species by the local population and their behaviour (invasive or not). <p>The correlation between different natural and anthropogenic environmental factors and the composition of plant communities has been demonstrated through the analysis of vegetation plots. Three types of green areas were studied: spontaneous vegetation on terra firma, wetlands <p>and domestic gardens.<p><p>The main ecological
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Fick, Hendrik Jacobus. "Managing biodiversity in a developing country mining context / Fick H.J." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7337.

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South Africa is one of the most biologically diverse countries in the world. However, biodiversity is suffering under the huge demand for natural resources and the increasing dependence of rural communities on these same resources. It has also become apparent that an alarming number of species are threatened, endangered or even destroyed. Surveys have revealed that 34% of the country’s 440 terrestrial ecosystems are threatened. The three severest threats to biodiversity are overexploitation, overgrazing and mining. There is however a range of international, regional, national and local laws an
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Davie, Kim. "The biodiversity and epidemiology of potato virus Y (PVY) in Scotland." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27766/.

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Potato virus Y (PVY) is considered to be the most serious viral pathogen that affects potato crops worldwide and can cause substantial yield losses. PVY exists as a complex of strains that can be distinguished on the basis of their biology, serology and genome analysis. In recent decades novel recombinant PVYN strains have emerged that can cause Potato Tuber Necrotic Ringspot Disease (PTNRD). It is therefore important to understand the potential threat to the Scottish seed potato industry. This molecular nature of PVY isolates in Scotland was established through the use of partial sequencing,
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Martinez, Araneda Camila. "Plant phylogeography in southern South America." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5041.

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This thesis is a phylogeographic investigation into plant species from Patagonia, and aims to infer their past distributions from the study of genealogical lineages. These species have gone through several events such as glacial periods, volcanism and topographical change which are expected to contribute to the divergence of genetic lineages by shaping distributions, isolating populations and therefore changing their genetic structure. So understanding how these processes have affected populations is important to get information on how the biodiversity in the region has been assembled, to iden
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Fabricius, Christo 1956. "The impact of land use on biodiversity in xeric succulent thicket, South Africa." Doctoral thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/9512.

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Bibliography: leaves 100-114.<br>Human-induced land management practices are key factors which influence the dynamics of landscapes, land elements and biotic communities in Xeric Succulent Thicket, a notoriously fragile and low resilience ecosystem in the Eastern Cape, South Africa. In its natural state this vegetation type is characterized by a continuous mosaic of clumps of diverse woody shrubs in a matrix of grass, hardy dwarf shrubs and bare ground. When indigenous herbivores are replaced by domestic livestock at unsustainable stocking rates, the ratio of clump to interclump areas decrease
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CAVALLORO, VALERIA. "Exploiting the Pavia territory plant biodiversity for the discovery of proteasome modulators." Doctoral thesis, Università degli studi di Pavia, 2022. http://hdl.handle.net/11571/1449465.

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Maguire, Victoria. "Immunogold labelling of TIP proteins in the resurrection plant Craterostigma plantagineum." Thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/26509.

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Louw, Merika. "Propagation and stress physiology of selected Subtropical Thicket species : towards increasing biodiversity at rehabilitation sites." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1021115.

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Sundays Thicket and Spekboomveld vegetation in the Eastern Cape have experienced intensive and extensive degradation due to over-browsing by domestic stock. The Subtropical Thicket Restoration Project aims to take advantage of the high carbon sequestration potential of Portulacaria afra (Spekboom) and other Thicket species, to rehabilitate degraded Thicket by restoring biodiversity and ecosystem services, create job opportunities and socio-economic upliftment in local communities, and promote the trade of carbon credits generated by planting and „farming‟ with Spekboom truncheons, rather than
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Miloud, Youssra. "Etude du potentiel bénéfique des souches de Rhizobium pour Medicago truncatula : symbiose, solubilisation du phosphate et lutte contre la verticilliose." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0123/document.

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En raison de leur capacité à former une symbiose avec des bactéries du sol appelées Rhizobium, ces bactéries fixent l’azote atmosphérique et leurs plantes-hôtes n’ont donc pas besoin de fertilisant azoté, les légumineuses jouent un rôle important dans l'agriculture. En outre, certaines souches de Rhizobium ont la capacité de solubiliser le phosphate, fournissant ainsi du phosphore assimilable aux plantes hôtes. Une aptitude à lutter contre certains agents pathogènes a aussi été démontrée dans plusieurs études. La présente étude évalue l’efficacité symbiotique de rhizobiums tunisiens, leur capa
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Rowe, Rebecca L. "Implications for biodiversity of the deployment of commercial scale short rotation willow coppice." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/195559/.

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Willow short rotation coppice (SRC) is seen as an important renewable energy source within temperate regions including the UK and its deployment within the agri-environment is supported by a number of goverment policies. Willow SRC represents a significant land use change and its deployment has raised questions regarding the possible impacts on biodiversity and the delivery of ecosystem services. This work assessed the impact of three commercial willow SRC plantations on ecosystem processes through the use of herbivory, decomposition and predation bioassays. Comparisons were also made between
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Maholland, Peter D. "Effects of Prescribed Fire on Upland Plant Biodiversity and Abundance in Northeast Florida." UNF Digital Commons, 2015. http://digitalcommons.unf.edu/etd/562.

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Terrestrial ecosystems in the southeastern United States have evolved with fire as a common disturbance and as a result many natural communities require the presence of fire to persist over time. Human development precludes natural fires from occurring within these communities; however, prescribed fire is considered to be a critical tool in the effort to restore fire-dependent ecosystems after decades of fire exclusion. Direct effects of fire on individual floral and faunal species as well as benefits to biodiversity at the landscape (gamma diversity) level have largely been supported in previ
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Ferreira, Mariana Moreira. "Biodiversity and plant-pollinator interactions in native forest areas of Terceira Island (Azores)." Master's thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/23061.

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Neste trabalho avaliámos o impacto que a perturbação humana das comunidades da floresta nativa da ilha Terceira (Açores) tem sobre a riqueza específica e nas interações ecológicas entre plantas e polinizadores. Para o efeito selecionámos dois locais emparelhados (um bem conservado e outro degradado), em duas áreas de estudo (Lomba e Pico Galhardo) e analisámos a integridade das redes ecológicas planta-polinizador. Constatámos que nas áreas bem conservadas as interações são dominadas por espécies nativas, enquanto que nas áreas perturbadas, apesar da prevalência de plantas introduzidas, os poli
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Reimark, Josefin. "How has time and space affected plant biodiversity in the Hjälmö-Lådna archipelago?" Licentiate thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-79230.

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Traditionally European farmland management has declined during the last century, mainlydue to abandonment or intensification. When traditional management is replaced by newmethods many species are negatively affected and often threatened with extinction. In thisthesis, the Stockholm archipelago is used as a platform to study the effects of land use changeover time. The overall aim is to examine how time and space affects plant biodiversity in arural landscape, with focus on heterogeneous pastures. Historical records and maps were interpreted together with aerial photos and used to constructfou
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Pornaro, Cristina. "Effects of wood establishment on plant biodiversity and herbage production of mountain pastures." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422525.

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In the past sixty years, the Southern Alps have undergone a tremendous and likely unprecedented change in land-use due to land abandonment in mountain regions. This phenomenon causes a turn of mountain grasslands to forests through the process of natural succession. Vegetation relevés in eight pastures under forest succession in the Italian Alps were collected at different percentage of wood cover. Moreover, in four of the eight sites, herbage samples were collected at different wood cover levels. In addition, in one site (characterised by Nardus grassland habitat) core samples were collected
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Patrick, L. Brian. "Fertilization and plant litter effects on the plant and epigeal arthropod communities." [Kent, Ohio] : Kent State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1259588844.

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Thesis (Ph.D.)--Kent State University, 2009.<br>Title from PDF t.p. (viewed April 14, 2010). Advisor: Mark W. Kershner. Keywords: biodiversity; nitrogen; fertilization; plant litter; trophic dynamics; epigeal community. Includes bibliographical references.
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Steffan, Shawn Alan. "Biodiversity and fear ecology the cascading effects of species richness and nontrophic interactions /." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Spring2009/s_steffan_041709.pdf.

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Kjellström, Felicia. "Impact of Olive Cultivation on Biodiversity in Messenia, Greece." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-107144.

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The biggest threat and cause to loss of biodiversity have been found to be the intensification of agriculture under the 20th century. Messenia is one of the oldest olive cultivation areas in Greece and the landscape is dominated by olive groves characterized by extensive tillage, which causes serious erosion and might be a threat to plant diversity. Organic olive cultivation is an alternative that aims to preserve and support biodiversity. In this study the plant composition in the edge zones of an organic and a conventional olive grove in Messenia were inventoried to be able to investigate if
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Peyre, Gwendolyn. "Plant diversity and vegetation of the Andean Páramo." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/296441.

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The páramo is a high mountain ecosystem that includes the natural and semi-natural habitats located between the montane treeline and the permanent snowline in the humid Northern Andes. Given its recent origin and continental insularity among tropical lowlands, the páramo evolved as a biodiversity hotspot, with a vascular flora of more than 3400 species and high endemism. Moreover, the páramo provides many ecosystem services for human populations, essentially water supply and carbon storage. Anthropogenic activities, mostly agriculture and pasture practices, as well as climate change are major
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Sultan, Gehan. "Impact d’une formulation minérale sur les composantes biologiques des sols agricoles." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST0103.

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Des études récentes ont permis de constater qu'une part de plus en plus importante des sols agricoles présente des déficiences en micronutriments. Ces carences posent donc de graves problèmes en terme de productivité. Il existe de nombreuses études sur le rôle des micronutriments dans le métabolisme des plantes et des microorganismes. Cependant aucune étude basée sur une approche holistique visant à prendre en considération l'ensemble des trois composantes biologiques du sol (plante, faune, microorganismes) par rapport à l'apport de micronutriments n'a été entreprise à ce jour. L'objectif de c
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Marshall, Carolyn Bowers. "Effect of plant functional group removal on the soil microbial community diversity and composition." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2865.

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A major objective of biodiversity-ecosystem functioning (BDEF) research is to determine the consequences of species loss, caused both naturally and anthropogenically, on the functioning of ecosystems. The impact of plant species loss on the soil microbial community has not received much attention even though soil microbes influence many important ecosystem functions such as decomposition and nutrient cycling. The objective of this research was to investigate how the functional group composition of the aboveground plant community influenced the belowground microbial community. Plant functional
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Gerique, Zipfel Andrés Verfasser], and Perdita [Akademischer Betreuer] [Pohle. "Biodiversity as a resource : Plant use and land use among the Shuar, Saraguros, and Mestizos in tropical rainforest areas of southern Ecuador = Die Biodiversität als Ressource / Andres Gerique Zipfel. Betreuer: Perdita Pohle." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2011. http://d-nb.info/1015475205/34.

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Onial, Malvika. "Responses of biodiversity to agricultural intensification : a study in the upper Gangetic Plain, India." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609391.

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Hauser, James W. "Effects of hydrology-altering site preparation and fertilization/release on plant diversity and productivity in pine plantations in the coastal plain of Virginia." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042010-020225/.

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Stein, Claudia. "Biodiversity and ecosystem functioning: regional and local determinants of plant diversity in montane grasslands /." Leipzig : UFZ, 2008. http://www.ufz.de/data/ufzdiss_11_2008_9590.pdf.

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