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 37 for “"ecological traits"”.
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Changes in Patterns of Territory and Habitat Overlap in Wood-Warblers Over Evolutionary Time
… among organisms are highly influenced by the ecological traits and strategies of the species that make up those communities. The conservation of ancestral traits can be important in determining how closely related species partition space and habitat on a local scale. Shared ecological traits …
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Ant cuticle microsculpture: diversity, classification, evolution, and function
… the evolution and lability of microsculpture traits. I then review the literature for functional hypotheses related to ant microsculpture. The second chapter explores the relationship of microsculpture and important morphological, physiological, and ecological traits to evaluate support for …
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Sense in Sensitivity: Assessing Species Vulnerability to Climate Change
… required the creation of a life history and ecological traits database, and required the use of multiple methods of statistical analysis. Exposure was calculated using projections of future suitable climate space created using species distribution model Maxent. To explore the impact of …
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Spatial and non-spatial patterns of genetic diversity in Neotropical bats
<p>Macroecological studies that predict genetic diversity and its correlation with other biodiversity dimensions are essential to conservation in a rapidly changing environment. However, in bats (order Chiroptera), studies associating abiotic or ecological traits that could help to predict genetic …
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'Islands' in an island: multiscale effects of forest fragmentation on lowland forest birds in Taiwan
… vulnerable to forest fragmentation and the ecological traits associated with specie vulnerability to forest fragmentation were identified. Only forest specialist species responded to the regional-scale area and isolation effects. The species richness of forest specialists increased with the …
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Regionalism and Universality on the Big Muddy: A Trail of Pavilions along the Mississippi River
… with unique climatic, cultural, geologic, and ecological traits. This thesis proposes a trail of pavilions along the full length of the Mississippi to encourage exploration of the river's diverse settings and cultures. A concept of regional and universal design will govern the form of each …
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Cool as a caterpillar: Understanding the responses of butterflies to temperature across the life cycle
… cycle events. They are diverse, wide-spread, and ecologically sensitive, with complex life cycles that differ in morphology, behaviour, and ecology, and therefore differ in their sensitivities and requirements. In my first data chapter, I use a systematic mapping method to screen, quantify and …
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The conservation genetics of the Clanwilliam cedar (Widdringtonia cedarbergensis)
… were divided into reproductive and "ecological" traits, and seedling growth traits. Reproductive and ecological traits were measured in the field and seedling growth traits were obtained from a seedling growth experiment carried out in the glasshouse. Overall, 15 potential fitness …
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An Empirical and Theoretical Comparison of the Socio-ecological Behaviors of Captive Chimpanzees (Pan troglodytes), Bonobos (Pan paniscus), and Western Lowland Gorillas (Gorilla gorilla): Social Tolerance and Behavioral Responses to Changes in Food Quality and Distribution
… to be the main factor leading to the socio-ecological traits of each species. Access to, and competition for, terrestrial herbaceous vegetation (THV) in each of the three species in thought to be linked to the social relationships and female-female bonds of each species. This study sought to …
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Towards a Temporal Theory of Ecology: Body Mass Role for Activity Patterns of North American Artiodactyls
Energy dynamics can shape ecological patterns and impact the evolutionary trajectory of a species. The metabolic theory of ecology links body mass to multiple ecological traits. This study seeks to extend these insights to activity patterns at a macroecological scale, using the large repository of …
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Living on the Edge: Conservation of Fish Species at Risk in Canada
… assigned values for several life history and ecological traits and a discriminant function analysis was conducted. Conservation status was correctly predicted 93% of the time. Traits that predicted conservation status were endemic distribution, recognized distinct populations, edge …
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An experimental test of intra- and inter-specific competition between invasive western mosquitofish (Gambusia affinis) and native plains topminnow (Fundulus Sciadicus)
… aggressive behavior. In mosquitofish, other ecological traits such as fast reproductive cycle and tolerance to a wide range of environmental conditions might be responsible for their invasion success globally. This suggests that mosquitofish may not be a driver in native species declines, but …
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Global Conservation Status and Threat Patterns of the World’s Most Prominent Forage Fishes (Teleostei, Clupeiformes)
… These small, schooling fishes are economically, ecologically and culturally significant globally. Despite their contribution to global fisheries and our increasing reliance on these fishes for food and industrial commodities, they are generally poorly known with limited information regarding …
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Seed mix design and application to overcome seed limitation in floodplain forest restorations
… is essential not only for the recovery of their ecological integrity but also for the services they provide to humanity. Many forest restoration efforts have focused primarily on the establishment of canopy species, operating under the assumption that understory species will naturally recolonize. …
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Host use, mutualism and parasitism in the Lycaeides butterfly complex
… speciation, and changes in other ecological interactions. In the first chapter, larval performance was investigated in three species of Lycaeides butterflies and placed into the context of other already studied ecological traits that potentially contribute to reproductive isolation …
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A Comparative Ecological Study of Two Sister Species of Darters in Kentucky, <i>Etheostoma Kantuckeense</i> and <i>Etheostoma Lawrencei</i>
… suggest that these species maintain similar ecological traits in their respective watersheds. The retention of these headwater adapted traits in disjunct populations likely promoted vicariant allopatric speciation in these fishes through isolation and the inability to disperse across …
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Population and migratory dynamics of blacklegged ticks and the Lyme bacterium, Borrelia burgdorferi
… coordinated, despite each possessing unique ecological traits and spending considerable portions of their life-cycles independently of one another. Investigation of B. burgdorferi at finer scale revealed a wide range of interaction tendencies among genetically distinct lineages, necessitating …
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Microbial community responses of an anaerobic enrichment to temperature shocks
… in wastewater to methane and CO2 mediated by ecological cooperation of microorganisms with different metabolic functions. Previous studies have reported that temperature fluctuation could lead to AD process instability and failure, perhaps through disruption of microbial cooperation. …
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Population Genetics and Phylogenetic Context of Weed Evolution in the Genus Amaranthus: Amaranthaceae)
… genus <italic>Amaranthus</italic> to investigate traits associated with the evolution of weediness. <italic>Amaranthus</italic> is a worldwide genus of 70 species, with no previous generic phylogeny. I included 58 species and two outgroups, sequenced at four nuclear genes and two chloroplast …
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