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 “"Coral colonies"”.
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The effect of environmental factors on the dynamics of bacterial populations associated with coral colonies and the implications for holobiont health
The coral holobiont is comprised of a diverse community of microbial partners, including bacteria living within microhabitats, such as the coral tissue’s and surface mucus layer (SML). However, little is known about the interactions between the bacterial communities in the various compartments of …
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Coral bleaching responses in Sodwana Bay, South Africa
… study assessed the bleaching response (BR) of coral colonies within the central reef complex in Sodwana Bay, South Africa. Bleach surveys were conducted at 16 sites on 8 reefs over the period of 2007 to 2013. A total of 12 858 coral colonies from 30 taxa were randomly sampled and colonies were …
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USING DEEP LEARNING AND UAV IMAGERY TO DETECT ELKHORN CORAL IN ST. CROIX’S EAST END MARINE PARK
<p>Elkhorn coral, or <em>Acropora palmata</em>, is an important reef building species that promotes species abundance and other ecological services to the communities in the US Virgin Islands. We captured high resolution imagery of a reef in St. Croix’s East End Marine Park using a Wingtra One UAV. …
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Coral calcification : insights from inorganic experiments and coral responses to environmental variables
Coral calcification is examined using a laboratory model and living corals. In the laboratory model, abiogenic aragonite formed at high saturation state (Ω>~20) had a granular appearance and was enriched in trace elements, similar to centers of calcification and dark bands in corals. Abiogenic …
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The Past and Present of Maldivian Coral Reefs
Coral reefs are highly diverse, valuable, but fragile ecosystems that are experiencing unprecedented degradation from anthropogenic impacts and climate change. Degraded reefs provide poorer ecosystem services, including reduced shoreline protection and diminished livelihoods through declining reef …
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THE CORAL CLADOCORA CAESPITOSA AS A HIGH RESOLUTION PALAEOCLIMATE ARCHIVE
… data (stable isotopes, trace elements) from coral skeletons is an established method to reconstruct seawater growth temperatures for palaeoenvironmental studies. In this work the temperate, colonial, Mediterranean scleractinian coral Cladocora caespitosa was investigated. First modern …
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Characterizing the ecology of coral reef microorganisms across different scales within the Caribbean
Microorganisms sustain the high productivity of coral reefs and support one of the most diverse, valuable, and threatened ecosystems on Earth. Despite the importance of reef microorganisms, there is a lack of understanding about their ecology, especially on Caribbean reefs. Furthermore, the …
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Coral calcification : insights from inorganic experiments and coral responses to environmental variables
The mechanisms involved in the formation of coral skeletons are examined using a laboratory model for coral calcification and the growth of living corals under different environmental conditions. Abiogenic aragonite was precipitated from seawater over a range of saturation states (Chapter 1). …
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Towards scalable modern marine ecosystem monitoring
… Atlantic right whales, emperor penguins, and coral reef ecosystems, face mounting anthropogenic pressures. Addressing these data gaps requires fundamentally better ocean observation capabilities, yet progress is constrained by the high cost of field campaigns, and institutional risk-aversion …
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The Dynamics of Wave-Driven Reef Pass Jets and Coral Population Recovery on an Island
… and currents replenish nutrients, transport coral and fish larvae between populations, and moderate temperatures. On many reefs, wave-driven or tidal flow through reef passes is the dominant mechanism of exchange with the open ocean. The fate of the jet as it flows onto the forereef slope, …
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Mixing it up: Multiple symbiont acquisition strategies as an adaptive mechanism in the coral Stylophora pistillata
… their obligate symbionts. Here I show that the coral <italic>Stylophora pistillata</italic> may garner the benefits of both transmission modes by releasing progeny with maternally derived symbionts that are also capable of subsequent horizontal symbiont acquisition. The algal symbionts …
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Quantitative tracking of the cellular and skeletal response of the Caribbean coral Orbicella annularis to gradients in marine sewage pollution
… is an abundant framework-building Scleractinian coral that serves as an ecological cornerstone throughout the Caribbean Sea. The O. annularis holobiont (all interacting biotic and abiotic components making up the coral) is negatively impacted by increased exposure to anthropogenic pollution, …
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Climate controls on coral growth in the Caribbean
… of the dominant environmental controls on coral growth. Corals exhibit significant responses to environmental variability occurring on multi-annual to decadal timescales, which are significantly longer than the duration of typical laboratory and field-based experiments. Skeletal growth …
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Geochemistry of slow-growing corals : reconstructing sea surface temperature, salinity and the North Atlantic Oscillation
A 225-year old coral from the south shore of Bermuda (64°W, 32°N) provides a record of decadal-to-centennial scale climate variability. The coral was collected live, and sub-annual density bands seen in x-radiographs delineate cold and warm seasons allowing for precise dating. Coral skeletons …