Interactive effects of CO2 and trace metals on the proteasome activity and cellular stress response of marine bivalves Crassostrea virginica and Mercenaria mercenaria

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Ocean acidification caused Eastern oysters and hard shell clams to accumulate more metal pollutants, which affected their physiology. (Laboratory study)

Immunomodulation by the interactive effects of cadmium and hypercapnia in marine bivalves Crassostrea virginica and Mercenaria mercenaria

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Ocean acidification increased the negative effects of cadmium pollution on the immune systems of quahogs and eastern oysters, potentially making them more vulnerable to pathogens and disease. (Laboratory study)

Interactive effects of elevated temperature and CO2 levels on energy metabolism and biomineralization of marine bivalves Crassostrea virginica and Mercenaria mercenaria.

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

When quahogs and eastern oysters were exposed to a combination of warmer temperatures and ocean acidification for 15 weeks, shell hardness decreased in both species. By itself, ocean acidification had a small effect on the physiology and metabolism of both species, but it improved survival in oysters. (Laboratory study)

Elevated level of carbon dioxide affects metabolism and shell formation in oysters Crassostrea virginica

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Juvenile oysters living in acidified seawater had higher mortality rates and less growth of shell and soft-body tissues. They also had higher metabolic rates, likely because of the higher energy cost of maintaining their body chemistry. The high-CO2 conditions also reduced the hardness and fracture toughness of the shells. (Laboratory ...

Interactive effects of salinity and elevated CO2 levels on juvenile eastern oysters, Crassostrea virginica.

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

When juvenile oysters were exposed to ocean acidification and/or low salinity, they had greater mortality, less energy stored in their tissues, and loss of soft tissue indicating energy deficiency. Ocean acidification and low salinity also reduced the hardness and fracture resistance of their shells. (Laboratory study)

Saturation-state sensitivity of marine bivalve larvae to ocean acidification

  • Posted on: Wed, 03/30/2016 - 15:50
  • By: petert

Ocean acidification results in co-varying inorganic carbon system variables. Of these, an explicit focus on pH and organismal acid–base regulation has failed to distinguish the mechanism of failure in highly sensitive bivalve larvae. With unique chemical manipulations of seawater we show definitively that larval shell development and growth are dependent ...

Vulnerability and adaptation of US shellfisheries to ocean acidification

  • Posted on: Wed, 03/30/2016 - 15:16
  • By: petert

Ocean acidification is a global, long-term problem whose ultimate solution requires carbon dioxide reduction at a scope and scale that will take decades to accomplish successfully. Until that is achieved, feasible and locally relevant adaptation and mitigation measures are needed. To help to prioritize societal responses to ocean acidification, we ...

The effects of elevated carbon dioxide concentrations on the metamorphosis, size, and survival of larval hard clams (Mercenaria mercenaria), bay scallops (Argopecten irradians), and Eastern oysters (Crassotrea virginica)

  • Posted on: Wed, 03/30/2016 - 13:50
  • By: petert

We present experiments that examined the metamorphosis, growth, and survivorship of larvae from three species of commercially and ecologically valuable shellfish (Mercenaria mercenaria, Argopecten irradians, and Crassostrea virginica) at the levels of CO2 projected to occur during the 21st century and beyond. Under CO2 concentrations estimated to occur later this century (~66 Pa, 650 ...

Physiological response and resilience of early life-stage Eastern oysters (Crassostrea virginica) to past, present and future ocean acidification

  • Posted on: Tue, 03/29/2016 - 16:25
  • By: petert

The Eastern oyster, Crassostrea virginica (Gmelin, 1791), is the second most valuable bivalve fishery in the USA and is sensitive to high levels of partial pressure of CO2 (pCO2). Here we present experiments that comprehensively examined how the ocean's past, present and projected (21st and 22nd centuries) CO2 concentrations impact the growth and physiology ...

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