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.
Results
Showing 1 to 8 of 8 for “"habitat specialization"”.
-
Regional Rarity: Consequences of Dispersal Limitation and Strategies for Reintroduction
… that limit species distributions within restored habitats has been a longstanding goal of restoration ecology, particularly with respect to differences between rare and widespread species. Numerous mechanisms have been proposed to contribute to rarity, including species traits, propagule …
-
Drivers of variation in the migration and foraging strategies of pelagic seabirds
… explore the drivers of variation in movements, habitat use and foraging behaviour, and the implications for life history and conservation. In Chapter 1, I provide an overview of the key topics of this thesis. In Chapter 2, I provide quantitative recommendations of minimum sample sizes needed to …
-
'Islands' in an island: multiscale effects of forest fragmentation on lowland forest birds in Taiwan
… isolated forests may not function as real habitat patches from the view of forest generalists because of their flexibility in utilizing the non-forest matrix. After accounting for the influences of environmental variables at other spatial scales, the regional-scale isolation effect still …
-
Soil factors and competition as determinants of fynbos plant species distributions in the South-western Cape, South Africa
… Differences between these species constituted habitat-specialization for soils of different depth. A laboratory study of seedling morphology and water-use showed that species differences also exist at the seedling stage and these would be important in determining distribution patterns. Very …
-
Evolution of reptile diversity in tropical savannas - a study across scales and continents
… diversity. Systems with highly heterogeneous habitats provide good models to investigate how landscape processes affect the observed patterns of ecological and genetic diversity, e.g. through speciation and local adaptation. Tropical savannas are environmentally heterogeneous biomes, covering …
-
Evolution of reptile diversity in tropical savannas - a study across scales and continents
… diversity. Systems with highly heterogeneous habitats provide good models to investigate how landscape processes affect the observed patterns of ecological and genetic diversity, e.g. through speciation and local adaptation. Tropical savannas are environmentally heterogeneous biomes, covering …
-
Geographic distributions and vertebrate host specificity of genetic lineages of Borrelia burgdorferi
… degree of B. burgdorferi dispersal limitation or habitat specialization. OspC alleles known to cause disseminated infections in humans were found at the highest frequencies across sites, corresponding to Delaware’s high incidence of Lyme disease. ☐ Negative interactions among pathogen genotypes …
-
Causes of rarity in glade-endemic plants: Implications for responses to climate change
… between stress-adaptation and reproductive specialization in three endemic plant species: Delphinium treleasei, Echinacea paradoxa, and Scutellaria bushii) that are locally abundant but restricted to stressful habitats and their closely-related congeners: D. carolinianum, E. pallida, S. …