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 14 of 14 for “"Habitat Partitioning"”.
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Habitat partitioning by sparrows along an elevational gradient
… distributions including: food, predation, and habitat structure. These factors were unable to account for the distributions of sparrows wintering along an elevational gradient in the Sonoran Desert of southern California, USA. Sage sparrows (Amphispiza belli), black-throated sparrows (A. …
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An Experimental Assessment of Soil-Based Habitat Partitioning in Understory Palms
… nutrient sites. These results suggest that niche partitioning along soil nutrient and water availability gradients along with the influence of pathogens and herbivores may promote the high palm species diversity documented for montane forests of Panama.
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Comparative Biology of Sympatric Red Diamond and Southern Pacific Rattlesnakes in Southern California
… within the context of resource use and niche partitioning. Using radio-telemetry and mark-recapture involving passive integrated transponders (PIT) tags, I studied Red Diamond (Crotalus ruber) and Southern Pacific (C. oreganus helleri) Rattlesnakes in Chino Hills State Park, California, from …
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Biotic and abiotic influences on aggressive interactions within larval <i> Ambystoma</i> assemblages
… is often facilitated through temporal or spatial partitioning mechanisms that reduce or eliminate direct interaction. However, in many communities exhibiting guild structure, wherein potential competitors may also prey on one another, sympatric relationships persist despite species' similar life …
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The distribution and ecology of invasive ant species in the Pacific region
… distribution modeling. On a finer spatial scale, habitat partitioning was evident at Colo-i-Suva Park in Fiji, where distinct ant communities were sampled from litter and canopy habitats. Results suggested that body size, habitat and resource utilisation interact to create opportunities for …
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Occurrence, Composition, and Habitat Associations of Terrestrial Herbaceous Plants in a Tropical Forest Community
… niche differentiation in terms of resource partitioning remains a central hypothesis for the maintenance of species diversity. However, all plants require seemingly identical resources, which would appear to limit the number of niche dimensions available for species to inhabit. Woody species …
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Estimating Taxonomic Diversity Using Centrum Growth Profiles and Stinger Morphology of 36 Million Year Old Stingrays From North Dakota
… and 2) older individuals lived in another habitat (habitat partitioning). The use of fossils stands to provide great insight into the effects of climate change on the age and growth biology of fishes. Our research indicates that diversity of freshwater stingrays was higher than expected. …
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Scourge or Sustenance: Using microfauna to explore the palaeoenvironment and palaeoeconomics of Epipalaeolithic and early Neolithic communities in Anatolia.
… settlements had on the wider landscape with habitat partitioning taking effect, and the impact these small animals had on settlements as pest species.
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Spatial ecology, habitat use, genetic diversity, and reproductive success: measures of connectivity of a sympatric freshwater turtle assemblage in a fragmented landscape
Habitat fragmentation can have serious conservation implications for long-lived species such as freshwater turtles. Using integrative radio-telemetry and molecular methods, I examined characteristics in five species of turtles that should influence connectivity and long-term persistence of …
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Movement ecology of the bronze whaler shark (carcharhinus brachyurus) in southern Africa
… and Namibia suggests parturition and juvenile habitat may be regionally discrete. Clear seasonal patterns of occurrence were evident for all life stages in South Africa, with sharks typically distributed in warm-temperate south coast regions during the austral summer and an increase in subadult …
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Impact zone delineation for biological assessment of power plant effluent effects on snail populations in the Clinch River
… plant discharges rather than naturally occurring habitat limitations. Habitat limitations for the two dominant snail species, Leptoxis praerosa and Pleurocera unciale were defined before power plant impact was assessed. Eleven physicochemical parameters (i.e., flow rate, substrate type, silt …
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Local and Systemic Controls on Fish and Fish Habitat in South Dakota Rivers and Streams: Implications for Management
… settings in controlling physical habitat and fish communities were better defined. My research approach was based on a premise that assessments of the health of rivers and streams in prairie environments would benefit from studies that 1) examine the moderating effects of systemic …
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Trophic role of small cetaceans and seals in Irish waters
… planktivorous fish are abundant. Some resource partitioning was found in bottlenose dolphins in Irish waters consistent with previous genetic and stable isotope analysis studies. Bottlenose dolphins in Irish waters appears to be generalist feeders consuming more than 30 prey species, however …
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Etude comparée de l’écologie de deux espèces jumelles de Chiroptères (Mammalia : Chiroptera ) en Belgique: l’oreillard roux (Plecotus auritus) (Linn., 1758) et l’oreillard gris (Plecotus austriacus ) (Fischer, 1829).
… we have shown that, independently of the cohabitation conditions (single-species and mixed colonies), the two species have similar dietary requirements. Qualitatively, the same types of prey are consumed : Lepidoptera, Diptera (Craneflies, Cyclorrhapha and others Diptera), Coleoptera, …