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Dissertations / Theses on the topic 'Bird distribution'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Carrizo, Savrina Flora. "Changes in the distribution and abundance of North American breeding birds." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609961.

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2

Cooper, Tessa June Groves. "The effects of land use changes on the distribution of forest dependent bird species in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97842.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Forests in South Africa have had a long history of human utilization and disturbance, and are under threat from a variety of anthropogenic land use changes. Foremost of these are deforestation and forest degradation, impacting the species native to these forests. The aims of this study were to determine changes in the distribution of forest dependent bird species according to the South African Bird Atlas Project; to relate these changes to changes in land-use; to identify links between these changes; to determine the extent, loc

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3

Winspear, Richard John. "A study of the distribution of bird species in fragmented woodland." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305824.

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4

Somveille, Marius. "The global ecology of bird migration : patterns and processes." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709448.

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5

Dyer, E. "A global study of the distribution and richness of alien bird species." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1475851/.

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Alien species are a major component of human-induced environmental change, yet spatial and temporal variation in the drivers of their introduction, and their subsequent distribution and richness, are poorly understood. Here, I present a global analysis of the drivers of this variation for a major animal group, birds (Class Aves), using the newly-created Global Avian Invasions Atlas (GAVIA) database. GAVIA includes information on introduction successes and failures, enabling me to examine the effect of colonisation pressure (the number of species introduced) on alien bird distributions. A descr

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6

Erni, Birgit. "Analysis of distribution maps from bird atlas data : dissimilarities between species, continuity within ranges and smoothing of distribution maps." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/14721.

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Includes bibliographical references.<br>A dissimilarity coefficient for estimating the dissimilarity between two bird atlas distributions is developed. This coefficient is based on the Euclidean distance concept. The atlas distributions are compared over all quarter degree grid cells. Existing coefficients are not suitable for the comparison of distributions with different total areas and species with different mean reporting rates. In each grid cell the reliability of the reporting rates depends on the number of checklists collected for the grid cell. Weights are used to solve this problem. T

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7

Hyrenbach, Karl David. "Marine bird distribution and abundance off southern California : pattern and process at multiple scales /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035415.

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8

Manu, Shiiwua Apeakighir. "Effects of habitat fragmentation on the distribution of forest birds in South Western Nigeria with particular reference to Ibadan Malimbe and other malimbes." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275419.

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9

Johnson, Jim A. "Breeding Bird Communities of Major Mainland Rivers of Southeastern Alaska." DigitalCommons@USU, 2003. https://digitalcommons.usu.edu/etd/6601.

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Because of the scarcity of information for bird communities at the major mainland rivers of southeastern Alaska, the main objective of this study was to provide baseline information including distribution, status, and habitat associations of breeding birds. I conducted a meta-analysis of all known reports (including the current study) conducted at major mainland rivers during the breeding season. I described bird species composition, distribution, abundance estimates, status, habitat associations, and guild membership for all birds recorded at 11 major mainland rivers. Based on incidental obse

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10

Lessig, Heather. "Species Distribution and Richness Patterns of Bird Communities in the High Elevation Forests of Virginia." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35899.

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Island biogeography theory predicts that the patterns and distributions of spatially isolated populations are governed by large scale processes. The high elevations forests in the Southern Appalachians represent a series of naturally fragmented islands that harbor many isolated populations of species at the southern limits of their range. Understanding the governing forces of population dynamics in this region will enhance the probability of species persistence in the face of threats such as global warming and human development. We surveyed bird populations across multiple elevations in Vir

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11

Matthews, Stephen Nicholas. "Modeling Bird Species Occurrence in Current and Future Landscapes." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/MatthewsSN2003.pdf.

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12

Watson, James Edward Maxwell. "Bird responses to habitat fragmentation at different spatial scales : illustrations from Madagascan and Australian case studies." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:abbeb257-d2b1-4c4a-bb87-195c51995e38.

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Despite increasing publicity, habitat loss and fragmentation remain a serious threat to biodiversity. The main objectives of this research were (i) to study the effects of forest fragmentation on the distribution and abundance of resident birds in the fragmented littoral forests of southeastern Madagascar and temperate woodlands of southeastern Australia at three spatial scales (patch, landscape and regional) and (ii) to place the results of these case studies within the realms of the equilibrium theory of island biogeography and its descendent theories, to ascertain whether it is appropriate

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13

Leitão, Pedro Jorge Paixão. "Improving species distribution models to describe steppe bird occurrence patterns and habitat selection in Southern Portugal." Thesis, University of Southampton, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505778.

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The birds of the steppe environments face a number of different threats relating to habitat degradation (such as agricultural intensification, land abandonment afforestation), and the vast majority of species have unfavourable conservation status. Conservation measures require an understanding of species habitat preferences and their occurrence patterns and must be applied at the relevant spatial scales. This study, investigated the habitat selection and resulting distributions of the steppe bird community in southern Portugal, one its strongholds.

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14

Peck, Kirsi Marianne. "Tree species preferences for foraging site and ways in which the preferences affect the distribution, abundance and species composition of arboreal woodland avifauna." Thesis, Durham University, 1989. http://etheses.dur.ac.uk/6730/.

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The tree species preferences by six arboreal bird species and their role in structuring the bird communities in woodland were investigated in two sites in County Durham. Each bird species showed a preference or avoidance for most of the tree species in both study sites. The patterns of tree preference were different for each bird species, and were the basis for efficient partitioning of the foraging niches in woodland. Bird species showed significantly less overlap in tree species choice than in any of the other four niche dimensions examined, making it the most important dimension of the fora

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15

Venne, Simon. "Can Species Distribution Models Predict Colonizations and Extinctions?" Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38465.

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Aim MaxEnt, a very popular species distribution modelling technique, has been used extensively to relate species’ geographic distributions to environmental variables and to predict changes in species’ distributions in response to environmental change. Here, we test its predictive ability through time (rather than through space, as is commonly done) by modeling colonizations and extinctions. Location Continental U.S. and southern Canada. Time period 1979-2009 Major taxa studied Twenty-one species of passerine birds. Methods We used MaxEnt to relate species’ geographic distribu

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Groom, Jeremiah D. "Distribution, territorial limitations, and patch colonization dynamics of bird species in a fragmented temperate-zone woodland landscape." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1060694203.

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17

LUPPI, MASSIMILIANO. "Analysis of species distribution in time and space for wildlife conservation." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2016. http://hdl.handle.net/10281/138011.

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Lo scopo principale della mia tesi è l’individuazione e l’applicazione di appropriati approcci modellistici, a casi di studio riguardanti l’analisi della distribuzione delle specie, l’ecologia del paesaggio e la qualità degli habitat, all’interno di aree a differente impatto antropico o in stato di abbandono. Nella prima parte ho analizzato gli andamenti demografici e le distribuzioni degli uccelli nidificanti in Lombardia negli agro-ecosistemi. I dati, raccolti mediante la tecnica dei punti di ascolto, derivano principalmente dal monitoraggio a lungo termine degli uccelli nidificanti in Lomb

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18

Harrington, Rhidian. "The effects of artificial watering points on the distribution and abundance of avifauna in an arid and semi-arid mallee environment." Connect to this title online, 2002. http://repository.unimelb.edu.au/10187/2874.

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The role of artificial watering points in the avifaunal dynamics of the semi-arid mallee woodlands of southeast Australia was examined. Species richness and abundance were monitored throughout the year at different distances from water to determine how birds were distributed around water points and how this changed in relation to environmental factors such as climate. Vegetation attributes were also measured to determine which factors explained patterns in the avifauna with distance from water, and also to allow a description of the vegetation in relation to the water points. Water points were

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19

Corcuera, Martinez Del Rio Pablo. "The influence of food and vegetation on bird distribution in tropical deciduous forest and dry oak woodland in western Mexico." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5296/.

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Bird species densities, richness and diversity were estimated on 11 7 plots in a dry forest and oak woodland in western Mexico. The counts were performed during autumn 1990 and 1991 and spring 1991 and 1992. The plant composition and stratification were measured on each plot. Arthropod densities were estimated for most trees and shrubs during the two autumns. The relationship between bird species diversity and the plant associations was inspected by means of a canonical ordination. The plant variables explaining the species richness, diversity, total density and evenness were obtained by means

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20

Glisson, Wesley J., Courtney J. Conway, Christopher P. Nadeau, and Kathi L. Borgmann. "Habitat models to predict wetland bird occupancy influenced by scale, anthropogenic disturbance, and imperfect detection." WILEY, 2017. http://hdl.handle.net/10150/625200.

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Understanding species-habitat relationships for endangered species is critical for their conservation. However, many studies have limited value for conservation because they fail to account for habitat associations at multiple spatial scales, anthropogenic variables, and imperfect detection. We addressed these three limitations by developing models for an endangered wetland bird, Yuma Ridgway's rail (Rallus obsoletus yumanensis), that examined how the spatial scale of environmental variables, inclusion of anthropogenic disturbance variables, and accounting for imperfect detection in validation

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21

Honkomp, Nora. "Exploring shifts in migration phenology and breeding distribution of declining North American avian aerial insectivores." Kent State University Honors College / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1620686253404077.

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22

Lukacovic, Kyle S. "A Parametric Study of Formation Flight of a Wing Based on Prandtl's Bell-Shaped Lift Distribution." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2130.

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The bell-shaped lift distribution (BSLD) wing design methodology advanced by Ludwig Prandtl in 1932 was proposed as providing the minimum induced drag. This study used this method as the basis to analyze its characteristics in two wing formation flight. Of specific interest are the potential efficiency savings and the optimal positioning for formation flight. Additional comparison is made between BSLD wings and bird flight in formation. This study utilized Computational Flow Dynamics (CFD) simulations on a geometric modeling of a BSLD wing, the Prandtl-D glider. The results were validated by m

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23

Shephard, Jill, and n/a. "A Multi-Scale Approach to Defining Historical and Contemporary Factors Responsible for the Current Distribution of the White-bellied Sea-Eagle Haliaeetus leucogaster (Gmelin, 1788) in Australia." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20041012.142221.

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The White-bellied Sea-Eagle Haliaeetus leucogaster is widespread in Australia, but has been the subject of conservation concern due to suggested localised declines and extinctions. Regionalised monitoring programmes have addressed some aspects of local concern, however a broader approach is needed to gain an understanding of large-scale processes affecting long-term persistence at scales equivalent to the species Australian range. Ultimately, the ability to predict change in population size over time accurately depends on the scale of analysis. By necessity, ecological studies using direct sa

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Shephard, Jill. "A Multi-Scale Approach to Defining Historical and Contemporary Factors Responsible for the Current Distribution of the White-bellied Sea-Eagle Haliaeetus leucogaster (Gmelin, 1788) in Australia." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367440.

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The White-bellied Sea-Eagle Haliaeetus leucogaster is widespread in Australia, but has been the subject of conservation concern due to suggested localised declines and extinctions. Regionalised monitoring programmes have addressed some aspects of local concern, however a broader approach is needed to gain an understanding of large-scale processes affecting long-term persistence at scales equivalent to the species Australian range. Ultimately, the ability to predict change in population size over time accurately depends on the scale of analysis. By necessity, ecological studies using direct sa

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25

Perré, Yvan. "Distribution et sélection de l'habitat chez les oiseaux migrateurs dans les savanes d'Afrique de l'Ouest : test du paradoxe de Moreau, et rôle de la compétition interspecifique avec les espèces résidentes." Thesis, Orléans, 2009. http://www.theses.fr/2009ORLE2072.

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Afin de préciser la distribution et l'écologie des oiseaux migrateurs paléarctiques et afrotropicaux en Afrique de l’Ouest, neuf grands types d'habitats situés au Burkina Faso ont été suivi par points d'écoute de février 2004 à novembre 2005. Contrairement aux prédictions du paradoxe de Moreau, nous démontrons que les différentes zones de savanes jouent un rôle complémentaire au cours de l’hivernage pour les migrateurs paléarctiques, et que le Sahel ne constitue pas un lieu d’étape primordial lors de la migration pré-nuptiale. En outre, nous montrons que les migrateurs n’exploitent pas plus le

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26

Dimitrije, Radišić. "Procena efektivnosti zaštićenih područja i IBA mreže za odabrane vrsta ptica u Srbiji." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110896&source=NDLTD&language=en.

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U  radu  je  analizirana  efektivnost  za&scaron;tićenih područja  Srbije  u  sada&scaron;njosti  i  budućnosti  na osnovu  zastupljenosti  povoljnih  stani&scaron;ta  i centara  diverziteta  116  običnih  vrsta  ptica odabranih na osnovu 11 kriterijuma. Zasebno su evaluirana  za&scaron;tićena  prirodna  dobara, međunarodno značajna područja za ptice (IBA) i mreža nastala preklapanjem dva tipa za&scaron;tićenih područja.  Povoljna  stani&scaron;ta  istraživanih&nbsp

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27

Lacy, Anne Ellen. "Predicting bird species distributions in northern Minnesota and Wisconsin forests /." Diss., ON-CAMPUS Access For University of Minnesota, Twin Cities Click on "Connect to Digital Dissertations", 2001. http://www.lib.umn.edu/articles/proquest.phtml.

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28

Creegan, Helen P. "Modelling the effects of changing habitat characteristics and spatial pattern on woodland songbird distributions in West and Central Scotland." Thesis, University of Stirling, 2005. http://hdl.handle.net/1893/48.

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This study investigated bird distributions in relation to local habitat and landscape pattern and the implications which habitat fragmentation may have for woodland birds. There were two sections to the research: an experimental study investigating bird gap crossing behaviour across distances of five to 120m; and an observational study modelling woodland bird distributions in relation to local habitat and landscape scale variables in two study areas (East Loch Lomond and the Central Scotland Forest). In the experimental study it was hypothesised that bird willingness to cross gaps will decreas

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29

Ödeen, Anders, and Olle Hastad. "The phylogenetic distribution of ultraviolet sensitivity in birds." Uppsala universitet, Zooekologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-201299.

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Background: Colour vision in birds can be categorized into two classes, the ultraviolet (UVS) and violet sensitive (VS). Their phylogenetic distributions have traditionally been regarded as highly conserved. However, the complicated nature of acquiring spectral sensitivities from cone photoreceptors meant that until recently, only a few species had actually been studied. Whether birds are UVS or VS can nowadays be inferred from a wide range of species via genomic sequencing of the UV/violet SWS1 cone opsin gene. Results: We present genomic sequencing results of the SWS1 gene from 21 avian orde

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30

Trinder, Mark Nicholas. "An investigation of matrix population model assumptions : wrens (Troglodytes troglodytes) as a case study." Thesis, University of Stirling, 2003. http://hdl.handle.net/1893/32.

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A simulation matrix population model of a small population of wrens (Troglodytes troglodytes) is presented. The field work methods used to obtain and analyse the demographic rates are provided. This includes a description of the use of miniature radio tags to track juvenile (post-fledging) survival and dispersal, and capture mark recapture analysis of an eight year dataset to estimate adult survival rates, taking into account environmental variation and density dependence. Age related reproductive rates were obtained from detailed nest surveys. Using these demographic rates (means and variance

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31

Studeny, Angelika C. "Quantifying biodiversity trends in time and space." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3414.

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The global loss of biodiversity calls for robust large-scale diversity assessment. Biological diversity is a multi-faceted concept; defined as the “variety of life”, answering questions such as “How much is there?” or more precisely “Have we succeeded in reducing the rate of its decline?” is not straightforward. While various aspects of biodiversity give rise to numerous ways of quantification, we focus on temporal (and spatial) trends and their changes in species diversity. Traditional diversity indices summarise information contained in the species abundance distribution, i.e. each species'

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32

Moody, Anthony L. "Towards understanding the distribution of groups of foragers." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318966.

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33

Shriner, Susan Ann. "Distribution of Breeding Birds in Great Smoky Mountains National Park." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-20011107-134136.

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<p>We assessed the utility of developing predictive models of species distribution within a large contiguous forest based solely on GIS (Geographic Information Systems) data. We conducted more than 7000 point count surveys of breeding birds at approximately 4000 locations throughout Great Smoky Mountains National Park (GSMNP). We combined these empirical data with habitat, topographic, and location variables to develop logistic regression models for 20 breeding bird species. The mean of observed points correctly classified for evaluation data was 74.3% with a range of 67.4% to 83.1%. Mean impr

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34

Ghazal-Asswad, Nabegh. "Distribution and habitat associations of birds in Sherwood Forest, Nottinghamshire." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421544.

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35

Breault, Andre Mario. "Breeding distribution, habitat selection and factors affecting coloniality in eared grebes in British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28922.

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In this study, I first describe distribution and abundance of breeding Eared Grebes {Podiceps nigricollis) in British Columbia. Second, I characterize and examine the relationships between nesting habitat and nest site selection on breeding group size. Finally, I. examine effects of colony size, nesting chronology and nesting synchrony on reproductive success at Eared Grebe colonies. I surveyed 421 wetlands in 1985 and 1986 and located 47 lakes used by nesting Eared Grebes. Those 47 lakes accomodated from a low estimate of 1761 to a high estimate of 4474 pairs. Breeding abundance, calculated

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36

Walker, Kevin R. "Climatic Dependence of Terrestrial Species Assemblage Structure." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23697.

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An important goal of ecological studies is to identify and explain patterns or variation in species assemblages. Ecologists have discovered that global variation in the number of species in an assemblage relates strongly to climate, area, and topographic variability in terrestrial environments. Is the same true for other characteristics of species assemblages? The focus of this thesis is to determine whether species assemblage structure, defined primarily as the body mass frequency distributions and species abundance distributions relate in convergent ways to a set of a few environmental va

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37

Vicente, de Bobes Joana. "Distribution and partitioning of organic pollutants and effects in coastal birds." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134824.

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Coastal areas are very susceptible to contamination due to the interaction of marine and anthropogenic processes. Persistent Organic Pollutants (POPs) are organic compounds very resistent to photolysis and chemical and biological degradation. According to its physicochemical characteristics, POPs are worldwide distributed. These contaminants tend to bioaccumulate through the food webs, so that predators are more sensitive to this contamination. Seabirds are highly exposed to organic pollutants due to their feeding habits and its relatively long life. In this thesis, it has been studied the a

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Buckton, Sebastian Timothy. "Spatio-temporal patterns in the distribution and ecology of river birds." Thesis, Cardiff University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325005.

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Hargrove, Lori Jean. "Limits to species' distributions spatial structure and dynamics of breeding bird populations along an ecological gradient /." Diss., [Riverside, Calif.] : University of California, Riverside, 2010. http://proquest.umi.com/pqdweb?index=0&did=2019822781&SrchMode=1&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1273860879&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2010.<br>Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed May 14, 2010). Includes bibliographical references. Also issued in print.

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Kirby, Jeff. "Distribution and dynamics of wintering waders in Britain with particular reference to weather." Thesis, Open University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295548.

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Batdorf, Katharine E. "Distributional Changes in Ohio's Breeding Birds and the Importance of Climate and Land Cover Change." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354560319.

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42

Söderström, Bo. "Farmland birds in semi-natural pastures : conservation and management /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5463-8.pdf.

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43

Lloyd, John David 1973. "Large-scale vegetation features affecting the distribution and abundance of grassland birds." Thesis, The University of Arizona, 1997. http://hdl.handle.net/10150/278602.

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I predicted the likely effects of fire on the abundance of grassland birds by determining which vegetal features influenced the distribution and abundance of grassland birds at the Buenos Aires National Wildlife Refuge, Arizona. Abundance of pyrrhuloxia (Cardinalis sinuatus) (r² = 0.363), Lucy's warbler (Vermivora luciae) (r² = 0.348), and total abundance of birds (r² = 0.358) was positively correlated with increasing density of mesquite (Prosopis velutina), whereas abundance of cactus wren (Campylorhynchus brunneicappillus) (r² = 0.452) was negatively correlated with increasing mesquite densi

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Quamen, Frank R. "Distribution and productivity of bald eagles and ospreys in Wisconsin (1974-1999) /." Link to Abstracts, 2004. http://epapers.uwsp.edu/abstracts/2004/Quamen.pdf.

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45

Mammides, Christos. "Using statistical modelling to link disparate sources of available information to study factors that influence bird distributions." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9975.

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The aim of this project is to develop a method to successfully link together various sources of disparate information and data in order to study and understand which factors influence bird communities in different areas. For many areas, especially those of high conservation priority, an enormous amount of information and data may already be available. By using the right tools they could potentially be linked to provide improved understanding of the mechanisms that influence the biodiversity in a region of interest. To test this hypothesis I used structural equation modelling (SEM) to link data

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Dunn, Jenny Claire. "Farming and foraging : indirect effects of management on bird biology through changing distributions of food and predators." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/15218/.

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Farmland songbirds have shown dramatic population declines that have been linked to agricultural intensification. Populations have been impacted via three key factors: a reduction in available nesting habitat, a reduction in the availability of food for nestlings, and a reduction in over-winter food availability. The abundance of nest predators such as corvids, and the presence of sub-clinical disease may also play a part, and this thesis investigates the inter-relationships of some of these five factors along with their potential impacts upon farmland bird populations, using the yellowhammer

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Aizpurua, San Roman Olatz. "Species distribution models for birds: How useful are their outcomes for conservation applications?" Doctoral thesis, Universitat de Lleida, 2018. http://hdl.handle.net/10803/667947.

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Els models de distribució d'espècies s'utilitzen cada vegada més per orientar les accions de conservació de la biodiversitat. Aquests models prediuen la probabilitat d'aparició d'espècies en llocs on la seva presència es desconeix i són funció del vincle conegut entre la presència de l’espècie i les condicions ambientals. La probabilitat d'aparició d'espècies sovint es considera com un indicador de la qualitat de l'hàbitat. La interpretació correcta dels resultats d'aquesta tècnica de modelatge és de primordial importància abans d'utilitzar els models en aplicacions de conservació. L'objec

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48

Ibarra-Macias, Ana C. "Effects of Habitat Fragmentation on the Distribution and Movement of Tropical Forest Birds." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/481.

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Abstract:

Habitat loss and fragmentation occur at unprecedented rates, especially in tropical countries where human activities have deforested or degraded around 80% of tropical rainforests. Tropical forest fragmentation is considered the main cause of extinction of tropical forest avifauna, yet the mechanisms by which fragmentation affects bird populations are poorly understood. The present study investigates the pattern of bird species distribution in a fragmented landscape in tropical southeastern Mexico and the relation of bird community and species distribution patterns to landscape and fragment

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49

Vaughan, Ian P. "Development of species distribution models and their application to birds in river habitats." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55925/.

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Abstract:

1. Distribution models are used as management tools to predict species' distributions and quantify their habitat preferences. Numerous methodological issues require further development, which are explored using the distribution of birds along rivers as a model system in which there is a need to i) develop the quantification and analysis of variation in river habitat features and ii) better quantify species' habitat preferences for conservation and prediction. These themes were linked using a combination of the British Trust for Ornithology's Waterways Breeding Bird Survey (WBBS) and the Enviro

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50

Van, Rooyen Neil David. "Diversity and distribution of birds in villages in the Kalahari / N.D. van Rooyen." Thesis, North-West University, 2009. http://hdl.handle.net/10394/4379.

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Abstract:

Urbanisation and human settlements affects natural habitats in South Africa and around the world through the removal of vegetation, construction of roads and houses, and by various forms of pollution. The Bophirima District of the North West province is a desert margin area - a fragile ecosystem facing the threat of desertification and land degradation. The area has a high diversity of bird species, but is also an area where small villages and human settlements are continuing to modify the natural environment. To determine the effect of urbanisation in a desert margin area, bird surveys were d

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