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 9 of 9 for “"Dietary niche"”.
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Evolutionary palaeoecology of the megaherbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada
… on plant resources. Others have argued that dietary niche partitioning played an important role in the coexistence of these animals, with each species consuming a different plant resource than the next, thereby minimizing interspecific competition. This dissertation uses the megaherbivorous …
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What Drives Gut Microbial Diversity and Community Structure Among Closely-Related Host Species?
… due to the influence of individual variation, dietary niche, and environment. This study fills knowledge gaps by quantifying the strength of multiple eco-evolutionary factors on GMB variation, and forms a foundation for future studies to incorporate GMB monitoring into conservation planning, …
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Reproduction, Body Condition and Dietary Variation of the Lesser Siren (Siren Intermedia)
… in poorer body condition than nonbreeding males. Dietary analysis showed that sirens are generalists consuming a wide variety of prey taxa, although cladocerans were the predominant prey taxon in terms of frequency and total number. Sirens had the second lowest dietary niche breadth that has been …
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Biotic and abiotic mechanisms shaping multi-species interactions
… Chapter 2, I explore intra- and inter-specific dietary niche partitioning of Piper fruits among three frugivorous bats, illustrating the importance of fine-scale mechanisms that facilitate species coexistence and influence plant–animal interactions. In Chapter 3, I demonstrate how the chemical …
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Evolution of the diets of Australian Possums (Marsupialia: Phalangeriformes) from the Etadunna Formation in the Lake Eyre Basin, South Australia
… is therefore the best indicator of the possum’s dietary niche. These premolars can be wide and bladed to small and conical to tall and canine-like. The size and shape of third premolars can be correlated with molar shape to determine diet through Kendall’s ranked correlation. Additionally, a …
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The relative influence of competition and coevolution on the community structure of insectivorous bats in Southern Africa
… across ensembles, and echolocation and dietary patterns in ensembles with high species richness or abundance. At the same time, coevolution filters - mediated by prey defence - strongly influence dietary niche patterns. and to a lesser degree, echolocation patterns. Thus, the non-random …
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Dietary ecology and niche separation among three closely related species (Parapapio jonesi, Pp. whitei and Pp. broomi) of South African Plio-Pleistocene Cercopithecoidea from Makapansgat Limeworks site
… suggests a certain degree of ecological and/or dietary differentiation between taxa. This research explores the possibility of dietary niche separation within this sample. Stable isotope (13C/12C, 180/160 ) and trace-element (Sr, Ba, Ca) techniques for palaeodietary analysis are employed to …
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Dietary Shifts, Niche Relationships and Interspecific Competition in Sympatric Grey Langur (Semnopithecus entellus) and Purple-faced Langur (Trachypithecus vetulus) in Sri Lanka
Understanding how niche differences evolve in ecologically similar species and how these differences are maintained ecologically is a fundamental question in ecology. Interspecific competition has been shown to influence the behavior and ecology of organisms in a wide range of ecological …
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Niche Occupancy, Partitioning, and the Role of Trophic Flexibility in Coexistence of Neotropical Bats
Understanding niche occupancy of an organism is critical to understanding its role in the environment, and how it persists as compared to others. In animal studies, the trophic niche is often used as a simplification of the Hutchinsonian realized niche. Trophic flexibility is a common strategy …