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Full-Text Articles in Life Sciences

The Effects Of Dental Impairment On The Biology And Behavioral Ecology Of Wild Ring-Tailed Lemurs (Lemur Catta) At The Bezà Mahafaly Special Reserve, Madagascar, James Burns Millette Iii Apr 2016

The Effects Of Dental Impairment On The Biology And Behavioral Ecology Of Wild Ring-Tailed Lemurs (Lemur Catta) At The Bezà Mahafaly Special Reserve, Madagascar, James Burns Millette Iii

Anthropology Graduate Theses & Dissertations

Ring-tailed lemurs (Lemur catta) of the Bezà Mahafaly Special Reserve (BMSR) demonstrate exceptionally high rates of dental wear and subsequent tooth loss due to tamarind fruit consumption. How such wear and loss affects their behavior, nutrition and health is not yet fully understood. This study examines how dental impairment impacts ring-tailed lemur biology and behavioral ecology through a broad dental-ecological framework involving use of topographic analyses of tooth form, food processing data collection, and fecal measures of nutritional status. This study also presents visual measures of coat and body condition applicable to dental studies. Increasing topographically-measured dental impairment was associated ...


Gut Microbiota, And Management Of American Bison (Bison Bison) In Conservation And Commercial Herds Of The Great Plains, Gaddy Theodore Bergmann Jan 2016

Gut Microbiota, And Management Of American Bison (Bison Bison) In Conservation And Commercial Herds Of The Great Plains, Gaddy Theodore Bergmann

Ecology & Evolutionary Biology Graduate Theses & Dissertations

Because American bison (Bison bison) are important to both conservation and ranching, I inquired as to the diet and gut microbiota of these animals, and the implications of these factors for sound management. I found that bison in Kansas browsed more in spring and fall, and consumed more forbs during summer, but graminoids formed a consistently low proportion of the diet. In Colorado, the bison diet was dominated by graminoids, followed by forbs, then browse. This pattern remained consistent for 18 months, despite a brief increase in forbs and decrease in graminoids when the herd’s pasture was enlarged. Comparisons ...


On Taking A Thermal Approach To Fragmentation Research, Kika Tarsi Tuff Jan 2016

On Taking A Thermal Approach To Fragmentation Research, Kika Tarsi Tuff

Ecology & Evolutionary Biology Graduate Theses & Dissertations

One of the most immediate and consistently documented effects of forest fragmentation is an increase in solar radiation at newly created edges, resulting in higher and more variable temperatures within remnant habitat patches. However, few studies address altered thermal conditions as a mechanism driving ecological change in fragmented landscapes, despite the understanding that fragmentation changes temperature, and that temperature strongly influences the behaviour, physiology, and interactions of animal species. The goal of my dissertation research was to tease apart the role of temperature change in ecological responses to forest fragmentation. I first developed a conceptual framework that integrates thermal biology ...


Microtopoclimatic Effects On A Climate-Sensitive Habitat Specialist, The American Pika (Ochotona Princeps), Aidan Taylor Beers Jan 2016

Microtopoclimatic Effects On A Climate-Sensitive Habitat Specialist, The American Pika (Ochotona Princeps), Aidan Taylor Beers

Ecology & Evolutionary Biology Graduate Theses & Dissertations

There has been increasing acknowledgement that refugia at different scales facilitate the long-term survival of species and populations through climate oscillations. Species distributions and persistence are already affected by current climate change, and many taxa will become more spatially limited and less connected under further warming scenarios. Identifying likely microrefugia will improve our predictions of how species, communities, and ecosystems are likely to respond to climate change by providing a clearer understanding of likely demographic processes and connectivity. In this thesis, I considered suitable microhabitat in the face of current changing climates in the context of the persistence or development ...