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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 82 for “"Other Ecology and Evolutionary Biology"”.
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Evolution of the diets of Australian Possums (Marsupialia: Phalangeriformes) from the Etadunna Formation in the Lake Eyre Basin, South Australia
… known fossil marsupials representing both extant and extinct families in the Etadunna Formation, a formation that spans nearly two million years from 23.3 to 25 MA. During that two-million-year period, the terrestrial herbivorous marsupials present in the area underwent a dramatic transition both …
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Reconstructing the ecological relationships of the latest Cretaceous Antarctic dinosaurs and how functional tooth morphology influenced diet and ecological niche among basal Ornithopod dinosaurs
<p>Of the final three connected Gondwanan landmasses, the dinosaur fossil record of Antarctica in the Cretaceous is the least complete. Most dinosaur faunas in this time period (145 Ma to 66.0 Ma) are widely separated geographically and temporally from one another by million years. However, a group …
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Transgenerational Plasticity is Sex-dependent and Persistent in Yellow Moneyflower (Mimulus guttatus)
… is known to occur through both maternal and paternal gametes, but the underlying mechanisms have rarely been compared. In addition, the persistence of induction over multiple generations appears to vary widely but has been characterized for relatively few systems. Yellow monkeyflower …
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The Thermal Ecology of Sceloporus occidentalis
… impacts of the changing climate becomes more and more urgent. Ectotherms are excellent indicators of potential climatic ramifications on biodiversity because of their heavy reliance on the environment for their thermoregulation. Studies have historically looked at thermal tolerance values to …
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Understanding the complex relationships between climate, vegetation, and foraging behavior of a climate-sensitive alpine mammal in order to explain patterns of persistence
… serves as an indicator species of climate change and a model organism for studying its impacts on mountain mammals. Certain aspects of plant community composition and structure can function as predictors of pika distribution, but understanding the links between climate, forage quality, and …
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Effects of Diameter-limit and Two-age Timber Harvesting on Songbird Populations on an Industrial Forest in Central West Virginia
… effects on songbirds have been conducted in landscapes significantly altered by urbanization or agriculturalization rather than forested landscapes. There is some evidence that forest fragmentation due to timber harvesting has different effects on bird abundance than fragmentation from other …
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Helitrons are enriched in lichenized fungi with long generation length and small distribution sizes
… drive genome evolution by introducing mutations and causing structural instability and chromosomal rearrangements, particularly under conditions like environmental or genetic stress. In this study, we generated 18 new long-read reference genomes for lichenized fungi, which form obligate …
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Behavioral Response to UVB Differs in Subalpine Populations of Daphnia Melanica
… of freshwater zooplankton that inhabit ponds and lakes. They are commonly used as a model organism because they can reproduce clonally and are considered a foundation species in pond ecosystems. <em>Daphnia melanica</em> that inhabit the subalpine ponds of the Olympic National Park are exposed …
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An Analytical Study of Air-Sea CO2 Gas Exchange in the Northwest Mississippi Bight Region
… CO2 concentrations. Due to high spatial and temporal variability, CO2 fluxes in the coastal ocean are not as well characterized as those for the open ocean. More specifically, data for the northern Gulf of Mexico (GOM) coastal region is lacking. A time series analysis of air-sea CO2 flux …
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Palynological Evidence for the Paleoenvironmental History of the Miocene Llanos Basin, Eastern Colombia
<p>The distal Llanos foreland basin was influenced by subsidence events since the Cretaceous until the Pliocene. Although this area has been extensively explored and is considered a potential oil reservoir, few studies of its stratigraphy and depositional environments have been conducted. This …
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Population structure of the lizard Ecpleopus gaudichaudii coincides with a biogeographic barrier - the Doce River
… is an integral component of diversification and the accumulation of biodiversity. The degree to which isolated populations of the same species are genetically structured in geographical space is impacted by a variety of mechanisms. In this study, I document patterns and discuss possible …
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Phylogeography of Darlingtonea Kentuckensis and Molecular Systematics of Kentucky Cave Trechines
… is widely distributed along the eastern band of the Mississippian/Pennyroyal plateau in Kentucky and northern Tennessee. DNA sequence data from the mitochondrial gene cytochrome oxidase subunit I (COI) was collected from one to four individuals from 27 populations, and patterns of …
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Latitudinal Variation in Thermal Tolerance and Preference of <i>Fundulus notatus</i> and <i>F. olivaceus</i>: Implications for Temperature Mediated Reproductive Isolation
<p>Temperature is one of the most pervasive and influential abiotic factors affecting the life histories of fish, regulating a host of physiological processes and influencing behavioral thermoregulation. <em>Fundulus notatus</em>, the blackstripe topminnow, and <em>F</em>.<em> olivaceus</em>, the …
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Metabolism and cryo-sensitivity of domestic cat (Felis catus) and cheetah (Acinonyx jubatus) spermatozoa
… function are disrupted in teratospermic cats, and even structurally normal spermatozoa from these ejaculates may be functionally compromised. Teratospermic ejaculates are highly sensitive to damage during cryopreservation, limiting the success of genome resource banking programs for species …
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MYCOBIOME ANALYSIS OF TREES SELECTED BY BLACK-CAPPED CHICKADEES (Poecile atricapillus) AS NEST SITES
… in nest excavation by softening wood, and in turn the excavators disperse fungi. Recent molecular techniques have allowed researchers to examine communities of fungi present in environmental samples more comprehensively than ever before. However, this association has not been examined …
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Competition and Community Interactions of Two Generalist Herbivores
… have far-reaching consequences for the fitness and distribution of many organisms. In herbivorous insects, competition mediated by a third organism is more common than direct competition and has a strong effect on insect communities; yet most research on indirect competition among herbivores …
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Ecological Impact of Epigeal Termitaria on Vertebrates in the Tsavo Region of Southeast Kenya
… by producing termitaria (mounds) used by many other species as dens, lookouts or food sources. The role of termite mounds in biological communities is relatively unknown, despite their ubiquitous nature. I investigated their impact on vertebrates in the Tsavo region of Kenya. Through the …
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Assessing The Impacts Of Grazing By Piney Woods Cattle And Controlled Burning On The Herbaceous Layer In An East Gulf Coastal Plain Longleaf Pine Woodland
<p>Fire and grazing are two disturbances which influence vegetation composition and diversity in many ecosystems. In the southeastern United States, longleaf pine plant communities are adapted to frequent fires and are likely to have been grazed by bison in the past. Though bison have been …
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Investigating Diel Periodicity in Export Flux in the Gulf of Mexico Using a Particulate Imaging System
… snow camera system at 150 m depth was used, and particles were imaged at a 40 second interval for a 24 to 30 hour period at five sites in the Gulf of Mexico in June 2017. Each image was processed to identify and size all the particles within the frame, which was then processed to determine …
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