Blog Profile / Ocean Acidification
| URL : | http://oceanacidification.wordpress.com | |
|---|---|---|
| Filed Under: | Biology / Marine Biology | |
| Posts on Regator: | 3154 | |
| Posts / Week: | 20.8 | |
| Archived Since: | July 23, 2010 | |
Blog Post Archive
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Planktonic foraminiferal area density as a proxy for carbonate ion concentration: a calibration study using the Cariaco Basin Ocean Time Series
Biweekly sediment trap samples and concurrent hydrographic measurements collected between March 2005 and October 2008 from the Cariaco Basin, Venezuela are used to assess the relationship between [CO32-] and the area densities (?A) of two species of planktonic foraminifera (Globigerinoides ruber (pink) and Globigerinoides sacculifer). Show More Summary
Variability and trends of ocean acidification in the Southern California Current System: a timeseries from Santa Monica Bay
We investigate the temporal variability and trends of pH and of the aragonite saturation state, ?arag, in the southern California Current System on the basis of a 6 year timeseries from Santa Monica Bay, using bi-weekly observations of dissolved inorganic carbon and combined calculated and measured alkalinity. Median values of pH and ?arag in the […]
Ocean acidification session at AGU fall meeting
OS021: The Carbonate System Chemistry of Coastal Ecosystems: Physical, Chemical and Biological Drivers Ocean acidification (OA) is changing the carbonate system chemistry of the ocean with potentially profound impacts on marine organisms and ecosystems. Show More Summary
Session on ocean acidification at the EUR-OCEANS hot topics conference – A changing ocean
This EUR-OCEANS Conference will be hosted by PLOCAN in Gran Canaria, Spain, 6-8 November 2013. The conference aims at showing progress and perspectives on selected ‘hot topics’ in Marine Science. Over the past 5 years, the EUR-OCEANS Consortium has identified, supported and promoted a number of such topics, notably by funding foresight workshops, flagship programs […]
UN General Assembly set to explore impacts of ocean acidification
The United Nations General Assembly will begin today its consideration of the impacts that the increasing acidification of the world’s oceans will have on the marine environment and on people. This year’s informal Consultative Process on oceans, which opens today and runs through 20 June, will provide a forum for countries to discuss the challenges […]
Photosynthate translocation increases in response to low seawater pH in a coral–dinoflagellate symbiosis (update)
This study has examined the effect of low seawater pH values (induced by an increased CO2 partial pressure) on the rates of photosynthesis, as well as on the carbon budget and carbon translocation in the scleractinian coral species Stylophora pistillata, using a new model based on 13C labelling of the photosynthetic products. Symbiont photosynthesis contributes […]
Oysters may struggle to build shells as carbon dioxide rises
Ocean acidification could hamper larvae’s growth The changing chemistry of ocean waters may cause baby oysters to have trouble mustering the energy to build their shells, new research suggests. Oysters, clams, mussels and other bivalves build calcium carbonate shells using mostly raw materials from seawater. Show More Summary
Unique experiments on ocean acidification (video; in Swedish with English subtitles)
What will the ocean look like in a hundred years and which marine plants and animals will be left? About 60 scientists are currently studying the effects of acidification in Gullmarsfjorden, as part of a unique international research initiative. This is a project of BIOACID Helmholtz Centre for Ocean Research Kiel (Geomar). University of Gothenburg […]
Bland jätteprovrör i Gullmarn (in Swedish)
Utanför Fiskebäckskil flyter gigantiska provrör i Gullmarsfjorden. I ett stort internationellt projekt undersöker ett sextiotal forskare under fem månader försurningens effekter på havets ekosystem. DE SYNS REDAN på långt håll. FrånShow More Summary
Ocean acidification reduces growth and calcification in a marine dinoflagellate
Ocean acidification is considered a major threat to marine ecosystems and may particularly affect calcifying organisms such as corals, foraminifera and coccolithophores. Here we investigate the impact of elevated pCO2 and lowered pH on growth and calcification in the common calcareous dinoflagellate Thoracosphaera heimii. Show More Summary
Ocean acidification monitoring (audio)
I’m Lacy Gray with Washington Ag Today. Jan Newton, Principal Oceanographer with the Applied Physics Laboratory of the University of Washington and Executive Director of the Northwest Association of Networked Ocean Observing Systems, has been studying the changing ph of Washington’s coastal waters and how the state’s shellfish industry may be hit hard by the […]
Natural underwater springs show how coral reefs respond to ocean acidification
Ocean acidification reduces the density of coral skeletons, making them more vulnerable Ocean acidification due to rising carbon dioxide levels reduces the density of coral skeletons, making coral reefs more vulnerable to disruption and erosion. The results are from a study of corals growing where underwater springs naturally lower the pH of seawater. (The lower […]
Reduced calcification and lack of acclimatization by coral colonies growing in areas of persistent natural acidification
As the surface ocean equilibrates with rising atmospheric CO2, the pH of surface seawater is decreasing with potentially negative impacts on coral calcification. A critical question is whether corals will be able to adapt or acclimate to these changes in seawater chemistry. We use high precision CT scanning of skeletal cores of Porites astreoides, an […]
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment
Calcifying foraminifera are expected to be endangered by ocean acidification, However, the response of a complete community kept in natural sediment and over multiple generations under controlled laboratory conditions has not been constrained to date. Show More Summary
Changes in coccolith calcification under stable atmospheric CO2
Coccolith calcification is known to respond to ocean acidification in culture experiments as well as in present and past oceans. Previous studies basically focus on changes in coccolith weight due to increasing CO2 and the resulting changes in the carbonate system but pay little attention to the influence of other environmental factors. In order to […]
Purple sea urchins use rapid adaptation against ocean acidification
Some sea urchins may be able to adapt to stay ahead of climate change and ocean acidification, as the ocean’s carbon content increases. A study – “Natural variation, and the capacity to adapt to ocean acidification in the keystone sea urchin Strongylocentrotus purpuratus” published in Global Change Biology – aimed to find out how evolution […]
Acidifying seawater sees oysters in race to grow shells
Bad news for oyster lovers. As the ocean acidifies, oyster larvae are struggling to build their shells, reducing the number that reach adulthood. We already knew that acidifying oceans spell trouble for many marine species: the shells of some marine snails in the Southern Ocean have already begun to dissolve. But now there is evidence […]
Oysters and acidification
Oysters, like many bivalves, are important for marine ecosystems. The organisms filter water through their feathered gills, removing impurities as they inhale and exhale. In fact, native and invasive bivalves might filter the entire volume of the San Francisco Bay every 3-4 days! However, oysters around the world are threatened by ocean acidification. The acidity […]
General Assembly to explore impact of ocean acidification due to rising carbon emissions from human activities, 17-20 June
The United Nations General Assembly will consider the impact of increasing ocean acidification on the marine environment and on people as the theme of this year’s informal consultative process on oceans, to be held from 17 to 20 June. By absorbing increased amounts of atmospheric carbon dioxide caused by human activities, oceans have become 30 per cent more acidic […]