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 99 for “"Ocean acidification"”.
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Ocean acidification: physiological response from fish to cell
… of 280 μatm to current levels of 414 μatm. The oceans, one of the largest CO2 reservoirs, continuously absorb the atmospheric CO2, resulting in a decline of ocean pH and a decrease in carbonate saturation state. The study of the physiological effects induced by the predicted rise of seawater …
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Ocean acidification and its effects upon fitness in nereidid polychaetes
… growing scientific concern over the changing ocean carbonate chemistry as a result of ever increasing anthropogenic CO₂ emissions.Major changes to the basic chemistry of seawater, such as the water pH, are likely to have substantial implications for marine life in the future (Hardege et al., …
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Adaptive Tolerance to Ocean Acidification in the Marine Sponge: Chondrilla nucula
… Revolution has led to a 30% increase in ocean acidification over pre-industrial levels. Although most ocean acidification research thus far has focused on calcifying organisms such as corals, the potential of this increase in acidity (H+ ions) to cause acid-base imbalances in soft-bodied …
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Satellite-based Assessments Of Ocean Acidification For The Hawaiian Islands Region
Ocean acidification (OA) is a growing global environmental concern with impacts affecting regions all over the world, including remote areas such as Hawai‘i. OA is gaining worldwide attention due to environmental impacts including the detrimental effects of OA on coral reefs. Increased …
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OCEAN ACIDIFICATION: UNDERSTANDING THE COASTAL CARBON PUMP IN A HIGH CO2 WORLD
… a third of this carbon is absorbed by the ocean, through air-sea fluxes at the ocean surface (Sabine, 2004). Increased CO2 has changed the carbon chemistry of the ocean and hence the pH. pH is expected to drop by 0.4 by the year 2100. It is unclear how this lower pH will affect carbon …
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Response of pteropod and related faunas to climate change and ocean acidification
Recent concern over the effects of ocean acidification upon calcifying organisms in the modern ocean has highlighted the aragonitic shelled thecosomatous pteropods as being at a high risk. Laboratory studies have shown that increased pCO2, leading to decreased pH and low carbonate concentrations, …
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Impacts of ocean acidification and other (global change) stressors on marine invertebrates
… a rise in global temperature and a decrease in ocean pH. More carbon dioxide dissolves in the sea, lowers the pH, and makes the ocean more acidic. Now the main scientific challenge is to understand and predict the response of marine life to the predicted environmental change in the ecosystem. …
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Crossing the Ecoline: a visual response to increasing levels of ocean acidification
… and is a visual response to changing levels of ocean acidification. My art making is informed by the processes of dispersal and dissolution that occur at the point where the absorption of carbon dioxide takes place between the atmosphere and the ocean. This project is of an interdisciplinary …
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Ocean acidification influences on physiology and epigenetics in the Pacific oyster (Crassostrea gigas)
As ocean acidification continues to impact marine ecosystems at unprecedented rates, phenotypicplasticity may allow organisms to withstand more stressful conditions. Genomic methods can elucidate molecular mechanisms that contribute to phenotypic plasticity, allowing for a deeper understanding of …
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Living costs of ocean acidification and warming in herbivorous gastropods and their adaptations
… changes in future marine ecosystems, including ocean acidification and warming. In addition, extreme climatic events, such as heatwaves, will become more prevalent and persistent due to global warming. Thus, extensive studies have been conducted to determine how ocean acidification and warming …
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Assessing the risk of ocean acidification for scleractinian corals on the Great Barrier Reef
Ocean acidification will 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 …
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Biodiversity crisis and recovery during the Triassic-Jurassic greenhouse interval: testing ocean acidification hypotheses
… Triassic extinctions were linked with global ocean acidification and increased oceanic palaeotemperatures. Consequently, the aim of this present work was to test this ocean acidification hypothesis by investigating morphological changes in selected shelled fossil species across this extinction …
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The effect of ocean acidification on plant-animal interactions in a <i>Posidonia oceanica</i> meadow
Ocean acidification may be one of the greatest challenges facing 'Society over the next SO- 100 years. In the Mediterranean Sea, meadows of the seagrass <i>Posidonia oceanica</i> play a pivotal role in coastal systems, providing shelter and food for a highly diversified plant and animal community, …
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Impacts of ocean acidification on fitness and chemical communication in a model marine invertebrate, Nereis succinea
Oceanic uptake of anthropogenically produced atmospheric carbon dioxide (CO₂) alters carbonate chemistry and increases the acidity of seawater. Current forecasts estimate the pH of our oceans will drop by 0.3-0.4 pH units by the turn of the century. Past research has focused majorly on the impacts …
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The effects of elevated CO2 and ocean acidification on the production of marine biogenic trace gases
… the industrial revolution have led to increasing oceanic carbon uptake and changes in seawater carbonate chemistry, resulting in lowering of surface water pH. To date, surface ocean acidity has increased by 30% compared with pre-industrial times. The aim of this study was to investigate the …
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Pteropod shell condition, locomotion, and long-term population trends in the context of ocean acidification and environmental change
… dissolution and other adverse effects due to ocean acidification. This thesis focuses on assessing the possible biological effects of ocean acidification on the shells and locomotion of pteropods and examining the response of a local pteropod population to environmental change over time. I …
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Characterizing the effects of ocean acidification in larval and juvenile Manila clam, Ruditapes philippinarum, using a transcriptomic approach
Ocean acidification as a result of anthropogenic carbon dioxide (CO2) emissions and global climate change poses a risk to the ecological landscape of intertidal and shallow subtidal communities. The organisms that inhabit these waters will have to cope with changing environmental conditions through …
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Ocean Acidification and Seasonal Temperatures Counter Positive Novel Species Interaction and Warming Effects on Tropicalising Temperate Fish Communities
… and environmental novelty). However, ocean warming could minimise lethal winter effects on range-extending tropical fishes, allowing them to establish at temperate latitudes in the near future. This thesis provides empirical and experimental evidence that current and future climatic …
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Investigation of the effect of ocean acidification on the haemocyte proteome of the South African abalone, Haliotis midae
… environmental properties. Indeed, the ocean environment is susceptible to these imbalances and has already witnessed changes in seawater temperatures and pH. Over the last century, global ocean surface temperatures have increased by 0.74°C and seawater pH has declined by 0.1 units, …
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