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 13 of 13 for “"Biology, Conservation."”.
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Conservation of leopards in Ayubia National Park, Pakistan
Lodhi, Asad M.S. May 2007 Wildlife Biology Conservation of leopard in Ayubia National Park, Pakistan Committee Chair: Dr. Daniel H. Pletscher Large carnivores are important for biodiversity and ecosystem function, yet are very difficult to conserve because of their large home ranges and conflicts …
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Conservation of leopards in Ayubia National Park, Pakistan
Lodhi, Asad M.S. May 2007 Wildlife Biology Conservation of leopard in Ayubia National Park, Pakistan Committee Chair: Dr. Daniel H. Pletscher Large carnivores are important for biodiversity and ecosystem function, yet are very difficult to conserve because of their large home ranges and conflicts …
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Controls on soil carbon accrual in restored perennial grasslands.
Controls on soil carbon accrual in restored perennial grasslands.
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Exploring Fish Diversity as a Determinant of Ecosystem Properties in Aquatic Food Webs
I examined the effect of common carp across a gradient of fish richness in mesocosms. The invader reduced native fish production and the effect was reduced with increasing fish richness. The invertebrate community was modified by a top-down effect from the richness treatment, whereas the invader …
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Exploring Eastern Musk Turtle (Sternotherus odoratus) Population Dynamics and Phenotypic Plasticity in Comal Springs, Texas
Freshwater turtles are vital to aquatic ecosystems but are increasingly affected by anthropogenic change. The eastern musk turtle (Sternotherus odoratus) is a small, omnivorous species inhabiting spring systems in Central Texas, where invasive gastropods have become abundant. This study …
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Analysis of Hybridization Between Native and Invasive Pupfishes (Cyprinodon)
<p>Invasive species are detrimental to native species and when hybridization is involved a decrease in biodiversity may result. <em>Cyprinodon variegatus </em>is an invasive species that has caused devastation to several <em>Cyprinodon </em>species through rapid hybridization and genetic …
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Dolphin Behavioral Responses to Uncrewed Aerial Systems as a Function of Exposure, Height, and Type
<p>Uncrewed aerial systems (UAS) are becoming a standard tool in the study of cetaceans, however, a comparative assessment of animal responses to UAS has not been established to gauge the most effective systems for cetacean study. We utilized Dolphin Quest Bermuda’s eleven bottlenose dolphins as …
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The Influence of Human Disturbance on Avian Frugivory and Seed Dispersal in a Neotropical Rainforest
Habitat loss and disturbance due to human activity are major causes of global biodiversity decline. Beyond outright species loss, one potential outcome is modification of species interactions that are integral to ecosystem functioning. To investigate this possibility, I asked whether human activity …
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An examination of facilitative interactions between shrubs and local desert organisms within the desert ecosystems of southern California
In recent decades, facilitative interactions have been the focus of ecological studies, specifically those with foundational shrubs within drylands. However, little has been done to analyze how the density of shrubs influence the frequency of these interactions. Here, I aim to establish shrub …
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Possible Effects Of Climate Change On Induced Defenses In Tadpoles
Global climates are changing and the rate of change is expected to increase in the next century. Researchers predict that temporary ponds will be affected, resulting in shorter average hydroperiods (the amount of time a pond holds water). Species that live in these ponds will face increased stress …
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A Fine-scale Analysis of Spatial and Temporal Population Genetic Patterns in the Yellow Perch (<i>Perca flavescens</i>)
… populations, providing important insight for conservation and management. This knowledge can be used to evaluate life history, gene flow, recruitment dynamics, and responses to exploitation and habitat changes. Discerning the changes or consistencies in population genetic patterns over time …
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On the reproductive biology of the western Atlantic bluefin tuna, Thunnus thynnus
… tuna, the International Commission for the Conservation of Atlantic Tunas (ICCAT), currently recognizes two spawning stocks, eastern and western, separated by a management line at 45° W. The eastern stock spawns from May through July in the Mediterranean Sea with an age at first maturity …
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Migratory Stopover of Songbirds in the Western Lake Erie Basin
… landbirds during stopover is needed to develop conservation strategies for these species, many of which are in decline. I examined how migrant density during stopover in the Western Lake Erie Basin (WLEB) of Ohio was influenced by local- and broad-scale habitat variables, specifically: patch …