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 12 of 12 for “"Temperate reefs"”.
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Sponge Community Structure and Anti-Predator Defenses on Temperate Reefs of the South Atlantic Bight
… distribution of sponge anti-predator defenses on temperate reefs in the South Atlantic Bight. Significant differences in the distribution of sponge species, sponge densities, and densities of sponge predators were documented across two adjacent reef habitats. Significant differences also occurred …
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Comparisons of habitat use and diet of herbivorous kyphosids (Genus Kyphosus) in tropical and temperate reefs
… Kyphosus are commonly found in both tropical and temperate areas, with Western Australia having especially high Kyphosus diversity and abundance compared to other regions. Despite being common fishes, much of the ecology of this Genus has not been described. The aim of this study is to compare …
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Herbivory by Parma mccullochi (Pomacentridae) : its role as an ecosystem engineer in temperate algal-dominated reefs
… herbivorous fishes inhabiting both tropical and temperate reefs, yet the vast majority of studies examining feeding within this family have been undertaken in tropical rather than temperate regions. Despite the high abundances of the pomacentrid Parma mccullochi in temperate waters of Western …
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Potent but forgotten: nitrous oxide contributions by an ascidian on warming reefs
… emerging sources of microbial N2O production on temperate reefs with their ecological implications and quantifying general levels of public awareness about N2O via a media analysis. I focus on the habitat-forming ascidian Herdmania grandis, which I show is increasing in abundance on warming …
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Effects of habitat characteristics on cryptic fish assemblages
… is known to influence the abundance of fishes on temperate reefs. Biotic interactions play a major role in determining the distribution and abundance of species. The significance of these forces in affecting the abundance of fishes may hinge on the presence of organisms that either create or alter …
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Kelp forests in False Bay: urchins vs. macroalgae in South Africa's south-west coast biogeographical transition zone
… less productive urchin and coralline-dominated temperate reefs are becoming increasingly common. Kelp forests found along South Africa's south-west coast between Cape Point and Cape Agulhas occur in a region of biogeographical overlap. They are commonly referred to as transition zone kelp …
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Climate change impacts on macro and micro scale interactions between a tropical herbivore and temperate kelp forests
… poleward movement of tropical herbivores into temperate reefs by opening up thermally suitable areas poleward and increasing poleward larval dispersal. In Australia’s temperate Great Southern Reef, this has already strengthened some herbivore- kelp interactions in some regions and contributed …
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Effects of Sediment on Growth and Survival of Various Juvenile Morphologies of the Scleractinian Cora, Oculina Arbuscula (Verrill)
… play an important role in shaping tropical and temperate benthic marine communities. Here, I quantified sedimentation rates on a hard-bottom reef in the South Atlantic Bight (SAB) off the coast of Georgia, USA and assessed its effects on a conspicuous member of the benthic community: the …
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Dynamics of baseline stable isotopes within a temperate coastal ecosystem: Relationships and projections using physical and biogeochemical factors
… crucial for food web ecology. Using the shallow temperate reefs along the lower west coast of Australia as a test case, the broad aim of this thesis was to determine isotopic variations in a coastal food web and their relationship with surrounding environmental factors or food sources, to …
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Inducible Chemical Defenses in Temperate Reef Sponges of the South Atlantic Bight, U.S.A.
<p>Sessile organisms employing inducible defenses may receive protection from consumers while simultaneously minimizing the metabolic costs of maintaining these defenses. To investigate if reef sponges in the South Atlantic Bight employ inducible chemical defenses, I tested two predictions with …
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Are Chemical Defenses Allocated within Sponges to Defend Regions Most at Risk to Predator Attack?
… allocation within three sponge species from a temperate reef by investigating the predictions that: concentrations of chemical defenses are 1) higher in the outer 2 mm of the sponge tissue, 2) positively correlated with tissue nutritional quality, 3) negatively correlated with sponge structural …
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The biogeography and trophic roles of coastal marine sponges (Porifera) from the west coast of the North Island, New Zealand: Influences of catchments.
… water biogeography from this region. Focusing on temperate rocky reefs in the Taranaki Region of New Zealand, this thesis investigates the biogeography of sponge assemblages across broad spatial scales (hundreds of kms). It examines ecological processes, linked to trophic cascades to further our …