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 20 of 31 for “"habitat alteration"”.
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The Impact of Habitat Alteration on the Population Dynamics of a Declining Woodland Bird in the Mount Lofty Ranges
… guttata) are likely to be affected by such alterations. This species has been declining nationally since large-scale land-clearance prior to 1980. Focussed, species-specific research is required to identify the threats and their interactions that contribute to ongoing declines. This thesis …
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Migration and dispersal of the western leopard toad (amietophrynus pantherinus) in a fragmented agricultural landscape
Habitat alteration, primarily associated with human expansion and consumption, has been identified as the leading threat to biodiversity worldwide. The net result of an ever increasing human population is the loss of available habitat to species, affecting individual survival, together with the …
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Habitat Relationships and Life History of the Rota Bridled White-eye (Zosterops rotensis)
… This study examined the potential roles of habitat alteration, introduced black drongos (Dicrurus macrocercus), and introduced rats in the decline and gathered more information on the behavior and breeding biology of this species. New life history data were collected and Rota and Saipan …
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Effects of Anthropogenic Environmental Stressors on Amphibian Immune Defenses and Host-Pathogen Interactions Across Temperate and Tropical Systems
… diseases, climate change, and anthropogenic habitat alterations are projected to continue negatively impacting global biodiversity, we need to understand how physiological responses to these ecological stressors are impacting host health. Physiological stress responses are governed by …
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An assessment of a herpetofaunal community in Hamilton, County, Tennessee: baseline ecology, species richness, and relative abundance
… community structure and dynamics, and habitat alteration remains the most critical threat to these communities. Herein, I report on a 32-month study investigating species richness, abundance, sex ratios, and body sizes of amphibians and reptiles in a Hamilton County, Tennessee, wetland. …
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Rights, rules and liability : an approach to "preventing" feral goats
… control measures, but rather the consequence of habitat alteration, inimical to the needs of that species." (Howard, 1965:68) The situation where goats are escaping from farms and become feral animals can be considered an environmental problem. This study focused on the approach that one way to …
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DETECTION AND OCCURRENCE OF NERODIA HARTERI (SERPENTES: COLUBRIDAE) IN AN UPPER PORTION OF THE BRAZOS RIVER WATERSHED
… snakes are disproportionately impacted by habitat alteration adjacent to wetlands because of their reliance on both terrestrial and aquatic habitats. Brazos River Watersnakes, <em>Nerodia harteri</em>, are endemic natricines with one of the most restricted geographic ranges in North …
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Sex-specific Habitat Use and Responses to Fragmentation in an Endemic Chameleon Fauna
… collection for the international pet trade and habitat loss and fragmentation. A recent field study reports a highly female-biased sex ratio in the Eastern Arc Endemic Usambara three horned chameleon, Trioceros deremensis, a large, sexually dimorphic species. This species is collected for the …
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The influence of silvicultural manipulations on plethodontid salamanders
Habitat alteration (i.e. degradation, fragmentation, and destruction) is the primary driver of amphibian decline and extinction. Despite their ecological importance and threatened status, very little long-term research has been conducted on how methods of forest management impact salamanders. In …
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Effects of environmental change on species: Marvacrassatella lineage and the Plio-Pleistocene record of sea level change
… to five species, survived three episodes of habitat alteration over three million years. Approximately 800 specimens representing seven formations (Yorktown, Duplin, Raysor, Jackson Bluff, Tamiami, Chowan River, and James City) and three members (Rushmere and Moore House Member of the …
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Using spatial ecology data to inform development and mitigation of a trap rock quarry in Blanding’s turtle (Emydoidea blandingii) habitat
… degradation of wetlands and surrounding upland habitat, alteration of movement corridors, accidental mortality, and increased risk of nest and turtle predation. These impacts, in turn, can cause changes in patterns of energy allocation, skewed sex ratios and changed demography, which may …
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Genetic Assessment of Rare Blackbanded Sunfish (Enneacanthus Chaetodon) Populations in Virginia
… good fitness and were not impacted severely by habitat alteration. The results of this study are relevant to selection of proper management techniques and strategies for this species. Mitochondrial DNA analyses detected no variation in the Virginia populations but significant (P F > 0.2) of …
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Conserving amphibian and reptile diversity in north Madagascar: Contributions from baseline herpetological survey work
… is the relentless destruction of its primary habitats. Socioeconomic factors in combination with particular aspects of Malagasy culture have led to the exploitation of natural resources which have already had an impact at a national level. Conservation strategies are in place to protect this …
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Flood Survival Strategies of Overwintering Snakes
… during hibernation and how anthropogenic habitat alteration and climate variability may affect habitat quality and overwintering survival. Chapter one reviews the current understanding of ecophysiology of hibernation in snakes. In chapter two, I introduce a winter habitat model of a …
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Spatiotemporal response of aquatic native and nonnative taxa to wildfire disturbance in a desert stream network
… freshwater animals are imperiled as a result of habitat alteration, species introductions and climate-moderated changes in disturbance regimes. Native conservation and nonnative species management could benefit from greater understanding of critical factors promoting or inhibiting native and …
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Selection of benthic habitat by yellow-phase American eels (Anguilla rostrata)
This thesis examines habitat preference of yellow-phase American eels (Anguilla rostrata) and relationships between age and length with that preference. The thesis is comprised of two chapters: (1) an introduction and literature review on American eel life history, their habitat selection, and the …
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Vulnerability of Indigenous Forests in Changing Landscapes
… forests all over the world are suffering habitat alteration, loss of original extensions, and increase of isolation levels, affecting their existence and sustainability. In New Zealand about 70% of the original forest cover has been destroyed since human settlement, converting them to a …
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Marine Bioinvasions in Anthropogenic and Natural Habitats: an Investigation of Nonindigenous Ascidians in British Columbia
… increase in biological invasions and habitat alteration through the building of coastal infrastructure is playing an important role in reshaping the composition and functioning of nearshore marine ecosystems. This thesis examined patterns of marine invasions across anthropogenic and …
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DISEASE IMPACTS ON MOOSE (ALCES ALCES) HEALTH AND ECOLOGY ALONG THEIR SOUTHERN RANGE LIMITS: PARASITES AS A LIMITING FACTOR IN NEW YORK
… interacting stressors, including climate change, habitat alteration, conflict with humans, and disease. Moose are hosts for numerous parasite species, some of which cause severe pathology and impact survival and population trajectories. Two parasites, meningeal worm (Parelaphostrongylus tenuis) …
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Facilitating golden mole conservation in South African highland grasslands : a predictive modelling approach
… Africa and threatened by anthropogenic habitat loss. At present, little is known about the biology, taxonomy, distribution and severity of threats faced by many of these taxa. In an attempt to raise awareness of these elusive grassland flagship taxa, the Endangered Wildlife Trust's …
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