Blog Profile / Ocean Acidification

Filed Under:Biology / Marine Biology
Posts on Regator:7197
Posts / Week:19.2
Archived Since:July 23, 2010

Blog Post Archive

Tidally-induced variations of pH at the head of the Laurentian Channel

The head of the Laurentian Channel (LC) is a very dynamic region of exceptional biological richness. To evaluate the impact of freshwater discharge, tidal mixing, and biological activity on the pH of surface waters in this region, a suite of physical and chemical variables was measured throughout the water column over two tidal cycles. The […]

In vivo pH measurement at the site of calcification in an octocoral

Calcareous octocorals are ecologically important calcifiers, but little is known about their biomineralization physiology, relative to scleractinian corals. Many marine calcifiers promote calcification by up-regulating pH at calcification sites against the surrounding seawater. Show More Summary

Impacts of ocean acidification on sensory function in marine organisms

Ocean acidification has been identified as a major contributor to ocean ecosystem decline, impacting the calcification, survival, and behavior of marine organisms. Numerous studies have observed altered sensory perception of chemical, auditory, and visual cues after exposure to elevated CO2. Show More Summary

Using mineralogy and higher-level taxonomy as indicators of species sensitivity to pH: a case-study of Puget Sound

Information on ecosystem sensitivity to global change can help guide management decisions. Here, we characterize the sensitivity of the Puget Sound ecosystem to ocean acidification by estimating, at a number of taxonomic levels, the direct sensitivity of its species. Show More Summary

Dissolution of abiogenic and biogenic calcium carbonate under ocean acidification conditions

Under ocean acidification conditions, the chemistry of the seawater will change including a decrease in pH, a decrease in carbonate ion concentration and a decrease in the calcium carbonate saturation state of the water (?). This has implications for solid marine calcium carbonates including calcifying organisms and carbonate sediments. Show More Summary

As oceans acidify, shellfish farmers respond

Scientists collaborate to mitigate climate impacts in the Northwest Taylor Shellfish Farm’s Quilcene hatchery perches on a narrow peninsula that juts into the sinuous waterways of Washington’s Puget Sound. On the July day I visited, the hatchery and everything surrounding it seemed to drip with fecundity. Clouds banked over darkly forested hills on the opposite […]

Alaska ferry to host long-distance ocean acidification study (audio)

The Alaska Marine Highway System ferry Columbia will be part of an international science experiment starting this fall when it resumes its weekly run between Bellingham, Wash., and Southeast Alaska. Equipment has been installed to continuously measure the ocean’s acidity along the ferry’s nearly 2,000-mile route. Show More Summary

Variable metabolic responses of Skagerrak invertebrates to low O2 and high CO2 scenarios

Coastal hypoxia is a problem that is predicted to increase rapidly in the future. At the same time we are facing rising atmospheric CO2 concentrations, which are increasing the pCO2 and acidity of coastal waters. These two drivers are well studied in isolation however; the coupling of low O2 and pH is likely to provide […]

Divergent responses in growth and nutritional quality of coastal macroalgae to the combination of increased pCO2 and nutrients

Highlights Growth rates and tissue quality of two common macroalgal species were assessed under conditions of high pCO2 and nutrient loading under monoculture and biculture. Ephemeral macroalgae exhibited significant increases in growth under high pCO2 and high nutrients. Show More Summary

Microbiome dynamics in early life stages of the scleractinian coral Acropora gemmifera in response to elevated pCO2

Reef-building corals are complex holobionts, harbouring diverse microorganisms that play essential roles in maintaining coral health. However, microbiome development in early life stages of corals remains poorly understood. Here, microbiomes...Show More Summary

Effect of CO2 on growth and toxicity of Alexandrium tamarense from the East China Sea, a major producer of paralytic shellfish toxins

Highlights Strain of Alexandrium tamarense isolated from East China Seas, showed a significant response to elevated CO2 levels in growth and toxicity. Strain ATDH grew faster and showed a larger density when exposed to elevated CO2 concentration, especially in the exponential period. The concentration per cell of each PST derivate varied and eventually caused the […]

Future marine ecosystem drivers, biodiversity, and fisheries maximum catch potential in Pacific Island countries and territories under climate change

Highlights Under the RCP 8.5 scenario, tropical Pacific temperature will rise by ? 3 °C by 2100. This is accompanied by declines in dissolved oxygen, pH, and net primary production. This will lead to local extinctions of up to 80% of marine species in some regions. 9 of 17 Pacific Island entities experience ? 50% declines […]

Influence of solution chemistry on the boron content in inorganic calcite grown in artificial seawater

The ratio of boron to calcium (B/Ca) in marine biogenic carbonates has been proposed as a proxy for properties of seawater carbonate chemistry. Applying this proxy to planktic foraminifera residing in the surface seawater largely in equilibrium with the atmosphere may provide a critical constraint on past atmospheric CO2 concentrations. However, precise controls on B/Ca […]

Metabolic response and thermal tolerance of green abalone juveniles (Haliotis fulgens: Gastropoda) under acute hypoxia and hypercapnia

Highlights Assessment of the impacts of hypoxia and hypercapnia on thermal tolerance Hypoxia induced a downshift in critical temperature. Hypercapnia did not affect thermal tolerance. Both drivers combined prompted a stronger narrowing of thermal tolerance. Show More Summary

Ocean acidification – from documenting the disaster to being part of the solution (video)

Presentation by Sam Dupont, Department of Biological and Environmental Sciences, University of Gothenburg, & CeCAR, at “Sea & Society” Talks, 7 September 2017. Video.Filed under: Presentations

Low recruitment due to altered settlement substrata as primary constraint for coral communities under ocean acidification

The future of coral reefs under increasing CO2 depends on their capacity to recover from disturbances. To predict the recovery potential of coral communities that are fully acclimatized to elevated CO2, we compared the relative success of coral recruitment and later life stages at two volcanic CO2 seeps and adjacent control sites in Papua New […]

Intense pCO2 and [O2] oscillations in a mussel-seagrass habitat: implications for calcification

Numerous studies have been conducted on the effect of ocean acidification on calcifiers inhabiting nearshore benthic habitats, such as the blue mussel Mytilus edulis. The majority of these experiments was performed under stable CO2 partial...Show More Summary

MCCIP Science Review 2017: Ocean acidification

The Marine Climate Change Impacts Partnership (MCCIP) reported in 2006 that: there is high confidence that ocean pH is decreasing, and will continue to do so for as long as atmospheric CO2 continues to increase; the impacts of ocean acidification on marine ecosystems and foodwebs are largely unknown. And in 2017 that: global ocean pH continues […]

Ocean acidification – how do we respond?

Ocean acidification is progressively affecting the structure and function of entire ecosystems, and is recognised as a threat to the economy particularly shellfish and fisheries sectors. This workshop provides an interactive opportunity...Show More Summary

House includes Bonamici’s ocean research provisions in funding plan (text and video)

WASHINGTON, DC [09/12/17] – Today Congresswoman Suzanne Bonamici (D-OR), co-chair of the bipartisan Oceans Caucus, announced that her provisions to increase funding for research and monitoring of harmful algal blooms (HABs) and ocean acidification were included in the House bill to set funding levels for Fiscal Year 2018. The House accepted Bonamici’s two amendments to […]

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