Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"habitat connectivity"”.
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Habitat connectivity and spotted owl population dynamics
The ecological consequences of habitat fragmentation include the direct effects of habitat loss and the indirect effects of reduced inter-patch dispersal. I examine these consequences of habitat fragmentation through two separate studies. The first study measures habitat connectivity through the …
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Connecting backyard wildlife habitats in Austin, TX : case study of Wildlife Austin
… the leading threats to biodiversity and wildlife habitat (McKinney 2002; Shochat et al. 2006). Urban environments are humandominated systems, yet they support wildlife habitat and provide meaningful ecological functions. Methods to conserve biodiversity and minimize habitat loss and fragmentation …
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Landscape Genetics of the Marbled Salamander (Ambystoma Opacum) at Mammoth Cave National Park
<p>Habitat connectivity is important to maintain in order to prevent loss of genetic diversity, reduce inbreeding depression, and decrease extinction risk in threatened or endangered species. Here I present a landscape genetics study on marbled salamanders (Ambystoma opacum) in highly connected …
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An Assessment of Potential Habitat Corridors and Landscape Ecology for Long-Tailed Macaques (Macaca Fascicularis) on Bali, Indonesia
… forest corridors exist on Bali that may provide habitat connectivity between 42 Balinese long-tailed macaque troops. The GIS database was also analyzed to determine if the landscape type that has the highest percentage of overlap with the 42 Balinese long-tailed macaque home range sites is …
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COMMUNITY STRUCTURE AND FUNCTIONAL DIVERSITY OF IMPERILED GREAT PLAINS FISHES: IMPLICATIONS FOR CONSERVATION OF TWO ENDANGERED SHINERS (SHARPNOSE SHINER NOTROPIS OXYRHYNCHUS AND SMALLEYE SHINER NOTROPIS BUCCULA) IN THE UPPER BRAZOS RIVER, TEXAS
… were restricted to stream sites with greater habitat connectivity and continuous stream flow which are required for key habitat requirements for successful recruitment.</p>
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Investigating the great crested newt landscape in a pond rich environment : developing a landscape scale management perspective
… thesis investigated graph theoretic analysis of connectivity and habitat availability for landscape scale management of Triturus cristatus, the Great Crested Newt. The ecological foundations of wider landscape management concepts and knowledge base on T. cristatus' habitat requirements, dispersal …
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A wetland vulnerability assessment : consequences for the avian communities of saltmarshes
… to assess the vulnerability of these habitats to sea level rise; to determine the impacts of sea level rise on nesting avifauna; and to derive recommendations for conservation practice.Vegetation classification methods using data from satellites and Unmanned Aerial Vehicles (UAV) for …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… be detrimental by inhibiting movement among key habitats, but can also be beneficial by preventing exotic species expansion. Therefore, evaluation of these tradeoffs is critical before making decisions that may affect the long term viability of populations. The disruption of movement corridors …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… be detrimental by inhibiting movement among key habitats, but can also be beneficial by preventing exotic species expansion. Therefore, evaluation of these tradeoffs is critical before making decisions that may affect the long term viability of populations. The disruption of movement corridors …
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Predicting the Repercussions of Anthropogenic Landscape Modifications on the Biota Using Species Focused Adaptable GIS and Spatial Dynamic Models
Habitat fragmentation and species invasions are increasingly threatening the survival of native species worldwide. In this context, a set of tools and approaches was developed to help (1) improve our understanding of species relationships to the landscape and predict their habitat usage, population …
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A Hitchhiker’s Guide to Invasion Biology: Describing the Ecological Mechanisms Underlying the Range Expansions of Two Ixodid Tick Species
… populations of suitable host species and tick habitat. Few empirical studies have been performed, however, investigating the ecological mechanisms underlying these range expansions. Ticks are parasitic organisms that disperse across landscape by hitchhiking on hosts, but must then survive in …
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Global change effects on ant-mediated seed dispersal
… of human-caused global change factors, such as habitat fragmentation and climate change, for the future of these mutualisms are not fully understood. My dissertation consists of five chapters that investigated the effects of habitat fragmentation and climate change on ants and their seed …
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The movement ecology of common bream Abramis brama in a highly connected wetland using acoustic telemetry.
… model species for testing the importance of habitat connectivity and examining variation in movement patterns in lowland rivers. Concurrently, the Broads National Park (µBURadV¶), eastern England, provides a large network of interconnected rivers, lakes and dykes in which to examine …
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African elephant conservation and population genetics
… due to human activities such as poaching and habitat destruction. The field of conservation genetics aims to reduce the rate and severity of species decline by better understanding their genetics and making relevant information available to conservation and management entities. African …
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Spatial models of plant diversity and plant functional traits : towards a better understanding of plant community dynamics in fragmented landscapes
The fragmentation of natural habitat caused by anthropogenic land use changes is one of the main drivers of the current rapid loss of biodiversity. In face of this threat, ecological research needs to provide predictions of communities' responses to fragmentation as a prerequisite for the effective …
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Variations of Wildlife Safety Crossings and Their Effects for Mule Deer in Northeast Nevada
… When barriers are created within a landscape, connectivity among habitat patches is disrupted, and movement between these habitat patches may be limited or eliminated (Bissonette and Adair 2007; Fortin and Agrawal 2005). Barriers to movement may lead to increased mortality, reduced …