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Blog Profile / Ocean Acidification

Filed Under:Biology / Marine Biology
Posts on Regator:4532
Posts / Week:21.2
Archived Since:July 23, 2010

Blog Post Archive

US/NZ host international workshop on ocean acidification

An International Workshop on Ocean Acidification: State-of-the-Science Considerations for Small Island Developing State, August 28-29, 2014, Apia, Samoa Jointly hosted by New Zealand and the United States in partnership with the Secretariat of the Pacific Regional Environment Programm. Show More Summary

Limpets counteract ocean acidification induced shell corrosion by thickening of aragonitic shell layers

Specimens of the patellogastropod limpet Patella caerulea were collected within (pHlow-shells) and outside (pHn-shells) a CO2 vent site at Ischia, Italy. Four pHlow-shells and four pHn-shells were sectioned transversally and scanned for polymorph distribution by means of confocal Raman microscopy. Show More Summary

Interactive effects of ocean acidification and warming on subtidal mussels and sea stars from Atlantic Canada

Anthropogenic CO2 is decreasing oceanic pH and contributing to seawater warming. We tested the effects of low pH and high temperature at levels predicted for 2100 on an ecologically important predator–prey system (sea stars, Asterias rubens, and mussels, Mytilus edulis) from the NW Atlantic coast. Show More Summary

Metabolic suppression during protracted exposure to hypoxia in the jumbo squid, Dosidicus gigas, living in an oxygen minimum zone

The jumbo squid, Dosidicus gigas, can survive extended forays into the oxygen minimum zone (OMZ) of the Eastern Pacific Ocean. Previous studies have demonstrated reduced oxygen consumption and a limited anaerobic contribution to ATP production, suggesting the capacity for substantial metabolic suppression during hypoxic exposure. Show More Summary

Living in warmer more acidic oceans retards physiological recovery from tidal emersion in the velvet swimming crab Necora puber (L.)

The distribution patterns of many species in the intertidal zone are partly determined by their ability to survive and recover from tidal emersion. During emersion most crustaceans experience gill-collapse impairing gas-exchange. Such...Show More Summary

Characterization of the Antarctic sea urchin (Sterechinus neumayeri) transcriptome and mitogenome: a molecular resource for phylogenetics, ecophysiology and global change biology

This is the first de novo transcriptome and complete mitochondrial genome of an Antarctic sea urchin species sequenced to date. Sterechinus neumayeri is an Antarctic sea urchin and a model species for ecology, development, physiology, and global change biology. Show More Summary

Health and population-dependent effects of ocean acidification on the marine isopod Idotea balthica

Three populations of the grazing isopod Idotea balthica were exposed to high CO2 treatment for a period of 20 days to investigate the effect of ocean acidification (OA) on animal health and immunocompetence. The results of the populations from more saline habitats were comparable and showed a 60–80 % decrease in immune response as a […]

Long Island Sound becoming more acidic, scientists say

Long Island Sound, already choked with nitrogen, may also be becoming more acidic — a state that could threaten marine life. Scientists are turning their attention to the phenomenon of ocean acidification — and its potential impact on the hard clams, oysters and other shellfish that make the Sound their home. Acidic water could threaten […]

Ocean acidification and policy failure

The Melbourne Sustainable Society Institute (MSSI) invites everyone to a free public lecture as part of the Sustainability in the Anthropocene series. Event date: Wednesday, 10 September 2014 Event time: 1-2pm Event location: Theatre...Show More Summary

Diverse coral communities in mangrove habitats suggest a novel refuge from climate change

Risk analyses indicate that more than 90% of the world’s reefs will be threatened by climate change and local anthropogenic impacts by the year 2030 under “business-as-usual” climate scenarios. Increasing temperatures and solar radiation cause coral bleaching that has resulted in extensive coral mortality. Show More Summary

Interactive comment on “Comparison of seven packages that compute ocean carbonate chemistry” by J. C. Orr et al.

Response to Referee, Richard Zeebe The comments from Drs. Zeebe and Wolf-Gladrow are repeated below in gray (here marked with “…”); our response follows in black. We thank them for the effort that they put into providing this comment. “Errors and typos in numerical routines that lead to differences in CO2 system calculations should of […]

Organic matter production response to CO2 increase in open subarctic plankton communities: Comparison of six microcosm experiments under iron-limited and -enriched bloom conditions

Increase in seawater pCO2 and the corresponding decrease in pH caused by the increasing atmospheric CO2 concentration (i.e., ocean acidification) may affect organic matter production by phytoplankton communities. Organic matter production forms the basis of marine food webs and plays a crucial role in oceanic CO2 uptake through the biological carbon pump, and hence will […]

Ocean acidification threatens economies and cultures around the world (text & video)

Ocean Conservancy intern Alexis Valauri-Orton spent the last three months on a journey around the world learning about ocean acidification. She visited marine communities most at risk from ocean acidification and saw firsthand how dire the need is for more research, guidance and infrastructure to prepare for the challenges ahead. She produced a video, shown […]

In our view: acidification harms oceans

When it comes to ocean acidification, the state of Washington is in damage-control mode. There is little doubt such acidification has — and will — take a toll on the state’s economy; the question is, at what cost? At stake is the state’s $270 million shellfish industry — along with Alaska’s $100 million king crab […]

Autonomous in situ measurements of seawater alkalinity

Total alkalinity (AT) is an important parameter for describing the marine inorganic carbon system and understanding the effects of atmospheric CO2 on the oceans. Measurements of AT are limited, however, because of the laborious process of collecting and analyzing samples. In this work we evaluate the performance of an autonomous instrument for high temporal resolution […]

Ocean acidification wrecks sharks’ smellovision

Scarier than any movie shark that can smell a drop of blood miles away (they can’t, by the way) is this week’s news about sharks’ sense of smell. A team of Australian and American scientists has just shown that smooth dogfishes (also called dusky smooth-hound sharks) can’t smell food as well after living in ocean […]

Acid–base physiology response to ocean acidification of two ecologically and economically important holothuroids from contrasting habitats, Holothuria scabra and Holothuria parva

Sea cucumbers are dominant invertebrates in several ecosystems such as coral reefs, seagrass meadows and mangroves. As bioturbators, they have an important ecological role in making available calcium carbonate and nutrients to the rest of the community. However, due to their commercial value, they face overexploitation in the natural environment. On top of that, occurring […]

Faster recovery of a diatom from UV damage under ocean acidification

Diatoms are the most important group of primary producers in marine ecosystems. As oceanic pH declines and increased stratification leads to the upper mixing layer becoming shallower, diatoms are interactively affected by both lower pH and higher average exposures to solar ultraviolet radiation. Show More Summary

A seawater filtration method suitable for total dissolved inorganic carbon and pH analyses

High biomass and heavy particle loads may interfere with carbonate chemistry analyses of samples from experimental aquaria and cultures used to investigate the impact of ocean acidification on organisms, as well as from biologically productive coastal regions. For such samples, a filtration method is needed that does not change the dissolved CO2 content, and consequently […]

Effect on pCO2 by phytoplankton uptake of dissolved organic nutrients in the Central and Northern Baltic Sea, a model study

Dissolved organic matter (DOM) has been added to an existing biogeochemical model and the phytoplankton were allowed to utilize the dissolved organic nutrients for primary production. The results show typical vertical structures forShow More Summary

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