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 529 for “"demography"”.
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Mathematical demography of the Cape vulture
The Cape Vulture Gyps coprotheres is one of the world's largest avian scavengers and was once widely distributed in southern Africa, to which it is endemic. It has suffered major changes of fortune in recorded history and has, at least twice, undergone large range contractions and expansions in the …
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Demography of the Cabbage Tree Palm, Livistona australis
This thesis, the demography of the Cabbage Tree Palm, 𝘓𝘪𝘷𝘪𝘴𝘵𝘰𝘯𝘢 𝘢𝘶𝘴𝘵𝘳𝘢𝘭𝘪𝘴, investigated some of the vital statistics concerning seed production and germination, seedling establishment and survival, time taken to reach reproductive maturity, longevity and population structure of the species. Seed …
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Predator Behavior and Prey Demography in Patchy Habitats
Habitat loss and fragmentation are among the greatest threats to biodiversity, and these threats can be exacerbated or alleviated by the presence of interacting species. The effect of habitat loss and fragmentation on predator-prey systems has received extensive theoretical attention, but empirical …
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Sociological Silhouettes: the Archaeology and Demography of Knowledge
This dissertation extends prior work on the evolution of the social sciences from two unconventional angles. First, I dig up significant “deaths” of cited works in sociology's history, and use citation context analysis and expert interviews to conduct rudimentary autopsies, to understand the …
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Paleogenomics in the Americas: demography, adaptations, and resilience
This work covers the evolutionary history of an indigenous population from the Americas through the lens of ancient DNA. In recent years, major advances in DNA sequencing have allowed for the utilization of ancient DNA on a grand scale. We now have the ability to examine the whole genomes of …
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Demography and design in an R&D organization
… in Korea, this study investigates the impact of demography diversity on project team performance. Particularly, this study moves beyond previous research by broadening the demographic variables to the education characteristics such as major, school, and educational level as a group. The results …
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Decision-making and demography of greater white-fronted geese
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI-COLUMBIA AT AUTHOR'S REQUEST.] Greater white-fronted geese (Anser albifrons) are Arctic-nesting waterfowl with breeding ranges distributed throughout the Arctic. Due to this broad distribution, the species has been separated into four to five …
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Effects of Forest Fragmentation on Central Amazonian Bird Demography
… Amazonian second growth, we lack comparisons of demography among second growth, continuous forest, forest fragments in regenerating landscapes, and truly isolated fragments. Here, we used point-count and capture data to compare Amazonian bird communities among continuous forest plots, 100 ha …
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Ornate box turtle (Terrapene ornata) demography in northern Illinois
… distribution, we understand little about the demography of remaining populations. I collected population vital rates and projected persistence for two Ornate Box Turtle populations in northern Illinois. I estimated reproductive output by radiographing female turtles, and of the 70 females …
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Demography of the spotted turtle (clemmys guttata) in Illinois
The Spotted Turtle (Clemmys guttata) has been well-documented and studied at two locations in Will County, Illinois, since 1987. Although spatial and reproductive ecology are relatively well understood, there remains no comprehensive demographic analysis of the two populations. I investigated the …
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The demography of Balanites maughamii : an elephant-dispersed tree
Balanites maughamii is an ecologically and culturally valuable tree species, heavily impacted by elephants, which strip bark selectively off the largest trees, increasing their susceptibility to fire damage. Elephants also break intermediate sized trees extensively, keeping them trapped in …
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Evolutionary demography of structured two-sex populations and sex ratios
Males and females may differ in stage-specific survival, maturation, fertility, or mating availability. These demographic differences, in turn, affect population growth rates, equilibrium structure, and evolutionary trajectories. Models considering only a single sex cannot capture these effects, …
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Demography, conservation, and management of small populations: Theory and applications.
Demography, conservation, and management of small populations: Theory and applications.
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Demography and ecology of a declining endemic: The Olympic marmot
Protected areas serve to conserve species, habitats, and ecological processes. However, biological systems within even large parks are increasingly affected by outside perturbations. The Olympic marmots (Marmota olympus) are ground-dwelling squirrel that inhabit high-elevation meadows almost …
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Demography and ecology of a declining endemic: The Olympic marmot
Protected areas serve to conserve species, habitats, and ecological processes. However, biological systems within even large parks are increasingly affected by outside perturbations. The Olympic marmots (Marmota olympus) are ground-dwelling squirrel that inhabit high-elevation meadows almost …
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POPULATION DYNAMICS OF SPECIES RECOVERY: MULTISCALE DEMOGRAPHY IN RESTORED HABITATS
… habitat attributes and local or regional demography, which highlights the need to assess species response to habitat restoration through multiple ecological frameworks. This dissertation assessed behavioral, ecological, and demographic factors affecting restoration outcomes for a …
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