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 20 of 22 for “"Coral Bleaching"”.
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Coral bleaching responses in Sodwana Bay, South Africa
This 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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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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Exploring the climate change refugia potential of equatorial Pacific coral reefs
… upwelling of cool waters onto equatorial coral reef islands would mitigate warming locally and modulate the intensity of coral bleaching. However, EUC water is potentially more acidic and richer in dissolved inorganic nutrients (DIN), both widely considered detrimental to coral reef …
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Exploring the climate change refugia potential of equatorial Pacific coral reefs
… upwelling of cool waters onto equatorial coral reef islands would mitigate warming locally and modulate the intensity of coral bleaching. However, EUC water is potentially more acidic and richer in dissolved inorganic nutrients (DIN), both widely considered detrimental to coral reef …
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Sedimentation threats to Red Sea corals : an ecological study of reefs in the Hurghada Region, Egypt
… examining the direct impact of sediment on coral bleaching and mucus production.Annual and seasonal patterns of sedimentation were investigated along the Hurghada coastal area of the Red Sea using sediment traps. Suspended particulate matter (SPM) and the percentage of non-carbonate sediment …
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Introducing the starlet sea anemone Nematostella vectensis as a model for investigating microbial mediation of health and disease in hexacorals
… example of this is the case of reef-building corals (class Anthozoa, subclass Hexacorallia) where rising seawater temperatures and coastal eutrophication have been correlated to increased prevalence of microbial diseases and coral bleaching. Despite such correlations, factors that govern …
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Reef Carbonate Budgets & Symbiodiniaceae Diversity in the Arabian Gulf, Western Indian Ocean & Central Indo-Pacific
Coral reefs are the result of long-term net calcium carbonate (CaCO3) accretion and the balance between carbonate production and erosion, referred to as the carbonate budget. Coral calcification is influenced by environmental conditions (e.g. temperature, depth and ocean acidification) and depends …
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Long-term dynamics and theoretical considerations in coral holobiont adaptation
Corals are predicted to adapt to environmental change in two ways: through the nuclear evolution of the host and/or through acquiring new, more suitable symbiotic partners. Given the rapid rate of climate change, considerable attention has focused on the latter, as new symbiotic partnerships could, …
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The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa
The high latitude coral communities of southern Africa suffered minimal impacts during mass bleaching events in the recent past. However, during the 2005 warm-water anomaly in the southern Indian Ocean, coral bleaching reached unprecedented levels. There is surprisingly little known about the fate …
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Lipid biomarkers of coral stress : calibration and exploration
Corals are increasingly threatened by warming sea surface temperatures and other anthropogenic changes. The delicate symbiosis between corals and their algal endosymbionts (zooxanthellae) is easily disrupted by thermal stress, leading to bleaching and eventual mortality. The use of lipid ratios as …
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Lipid biomarkers of coral stress : calibration and exploration
Corals are increasingly threatened by warming sea surface temperatures and other anthropogenic changes. The delicate symbiosis between corals and their algal endosymbionts (zooxanthellae) is easily disrupted by thermal stress, leading to bleaching and eventual mortality. The use of lipid ratios as …
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In Hot Water: Thermal Acclimation is Insufficient to Save Corals in the Anthropocene
<p>Scleractinian corals are animal partners in exquisite symbioses with a suite of algal, microbial, fungal and viral associates comprising miniature ecosystems collectively referred to as a holobiont. In recent decades, ocean warming has jeopardized the delicate balance of the very symbioses that …
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Investigating the photosynthesis of Symbiodinium in Caribbean gorgonian corals
… of marine invertebrates, including scleractinian corals and octocorals. Studies examining the symbiosis between Caribbean octocorals and Symbiodinium are sparse, even though octocorals blanket the landscape of Caribbean coral reefs. Here, I compared the photosynthetic characteristics of …
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Shallow water coral distribution and its response to climate change
<p>Shallow water corals are one of the main reef-building organisms that secrete carbonates as their skeletons, and therefore, are one of the major sinks of CO2 in the ocean. These reef builders are also very crucial to marine environments and human society. As the global energy demand continues …
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Not Too Hot, Not Too Cold, But Moderately Variable: The Influence of Environmental Variability on Coral Thermal Tolerance
… heat waves, resulting in declining health of coral reef ecosystems worldwide. Coral bleaching events – the breakdown in symbiosis between the coral host and their intracellular photosynthetic algae – are increasingly common in recent years and contribute to widespread losses in coral cover. …
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Influence of bulk defects in p-type Czochralski silicon on reliability of high efficiency solar cells
… made permanent changes to the Earth including coral bleaching, population extinction, and decreased water availability. Due to the alarming consequences of climate change, new energy installations should rely on renewable sources such as solar, wind, geothermal, and biomass. Utilizing the Sun, …
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Assessing the risk of ocean acidification for scleractinian corals on the Great Barrier Reef
… impact the photo-physiology of reef-building corals as it can lead to dysfunction of the symbiosis and loss of productivity. The major objective of this thesis was to provide insight into the mechanism of CO₂₋induced bleaching and productivity loss across multiple life-history stages and …
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HISTOLOGICAL RESPONSES OF THE SEA ANEMONE A. PALLIDA TO BLEACHING INDUCING STRESSES
Tropical Coral reefs are among the richest and most important ecosystem on Earth. This success would not be possible without the symbiosis established between corals and unicellular algae of the genus Symbiodinium that provide them with photosynthesis-derived carbon. Unfortunately, with the …
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Assessing the photosynthetic impact of inorganic carbon in symbiotic dinoflagellates in culture and in coral host complexes
… concentrations of dissolved inorganic carbon. Coral reefs are already at risk from increased seawater temperatures; however the impact of ocean acidification will be in addition to that of temperature change alone. The major objectives of this thesis were to provide insight into the effects of …
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Effects ofUltraviolet Radiation on Newly Settled Recruits of the Reef-building Coral <em>Porites astreoide</em>
<p>Coral reefs occur at low latitudes in clear, nutrient poor waters where high intensities of ultraviolet radiation (UVR, 280-400 nm) exist. Several negative effects of UVR have been demonstrated on adult corals, such as reduced calcification and skeletal growth rates, damage to tissue, and …
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