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 distribution"”.
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Habitat, distribution, and diet of the Tennessee Bottlebrush Crayfish (Barbicambarus simmonsi)
… of the first part of my study were to determine distribution, habitat use, and site occupancy of the Tennessee Bottlebrush Crayfish, Barbicambarus simmonsi. The distribution was increased from 3 to 14 sites across Shoal Creek. Habitat use modeling did not yield significant results, but …
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Characterization of Natural and Anthropogenic Seabed Features in the Southwestern Baltic Sea
… the seabed's physical characteristics, benthic habitat distribution, and the extent of human impacts. Seabed pressure assessments typically rely on large-scale proxy data, overlooking actual impacts and the long-term effects of human activities on the seafloor. Also, while habitat mapping …
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Aspectos ecológicos dos anfíbios registrados no Parque Estadual do Ibitipoca, Minas Gerais (Amphibia, Anura)
Aspects of the composition, habitat distribution, and period of activity of the anuran amphibians in the Parque Estadual do Ibitipoca (MG) were studied through monthly collects and observations from October/1986 to November/1988. Twenty-six species occurred, and it is improbable a substancial …
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Habitat characterization of Saskatchewan's Dakota skipper, Hesperia dacotae population
… main factor driving declines in Dakota skipper habitat and species abundance is assumed to be declining. Currently, there is a knowledge gap pertaining to habitat associations and availability of Saskatchewan populations. This information is critical to construct a recovery plan to secure Dakota …
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The ecological life history of the Cape Bulbul
… rare and occurs only where man has altered the habitat. Distribution has altered slightly in 150 years where colonisation has occurred. Several conditions may influence distribution, the species is mainly limited to within winter or all year round zones of rainfall. Population of breeding pairs …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… introduced throughout Patagonia, though their distribution and impact in the region remain poorly documented. Life history flexibility, and particularly partial migration play a major role in the ability of this species to adapt to Patagonian rivers. Consequently, this study explored habitat, …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… introduced throughout Patagonia, though their distribution and impact in the region remain poorly documented. Life history flexibility, and particularly partial migration play a major role in the ability of this species to adapt to Patagonian rivers. Consequently, this study explored habitat, …
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Predicting the ecological consequences of river management for a riverine cyprinid fish.
… be evidenced-based, current population and habitat models fail to incorporate fish behaviour and the interactions between fish and their environment, thus limiting their ability to predict management-relevant, population responses to environmental change. In order to address these …
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Ploidy and Ecophysiology analysis of the Arenaria ciliata L. complex (Caryophyllaceae) in Europe
… identities. The group has a wide but fragmented distribution across Europe, extending from high habitats in the mountains of central Europe and Iberia to sea-level habitats in the arctic. Because of their cold habitat distribution, they are vulnerable to climate change. This distribution also …
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Habitat modelling and the ecology of the marsh tit (Poecile palustris).
… inter-specific competition, and deteriorating habitat quality. Despite recent work investigating some of these elements, knowledge of the Marsh Tit’s behaviour, landscape ecology and habitat selection remains incomplete, limiting the understanding of the species’ decline. This thesis provides …
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An Assessment of Wood Duck Distribution, Abundance and Riparian Breeding Pair Habitats in South Dakota
… has historically responded well to harvest and habitat management is the wood duck (Aix sponsa). Wood ducks were nearly exterminated in the early 1900's as a result of unregulated harvest and habitat destruction. Since passage of the Federal Migratory Bird Treaty Act of 1918, ending spring …
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Sharp-Tailed Grouse (Tympanuchus phasianellus) Habitat Selection and Population Trends in Saskatchewan
… populations has been variously attributed to habitat loss, degradation, and fragmentation, the major factors affecting population trends remain to be definitively identified. Two areas of importance for research were highlighted by provincial government scientists to inform long-term …
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Population Ecology and Foraging Behavior of Breeding Birds in Bottomland Hardwood Forests of the Lower Roanoke River
Nest survival often is lower at habitat edges than in habitat cores because of greater nest predation and parasitism near edges. I studied nest survival of breeding birds in bottomland hardwood forests of the lower Roanoke River, North Carolina. Nesting success was monitored in two forest width …
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Aspects of spatial and habitat ecology of multiple Anopheles species (Diptera: Culicidae): malaria vectors in the highlands and foothills of Ecuador
… Since the incidence of malaria is limited by the distribution of its vectors, the purpose of this PhD thesis was to examine aspects of the ecology of Anopheles mosquitoes in the Andes of Ecuador, South America. A historical literature and archival data review (Chapter 2) indicated that Anopheles …
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Bog Turtle Distribution in Virginia: Assessing Proposed Methods for Finding New Localities and Examining Movement Between Wetlands
… My first chapter assessed a previously-developed habitat distribution model for bog turtles using an occupancy modeling approach. I conducted 216 surveys of 49 discretely predicted patches of habitat, recording conditions such as weather, size of wetland and time of year, hypothesized to affect …
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Incorporating plant community structure in species distribution modelling: a species co-occurrence based composite approach
Species distribution models (SDM) with remotely sensed (RS) imagery is widely used in ecological studies and conservation planning, and the performance is frequently limited by factors including small plant size, small numbers of observations, and scattered distribution patterns. The focus of my …
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Incorporating plant community structure in species distribution modelling: a species co-occurrence based composite approach
Species distribution models (SDM) with remotely sensed (RS) imagery is widely used in ecological studies and conservation planning, and the performance is frequently limited by factors including small plant size, small numbers of observations, and scattered distribution patterns. The focus of my …