Reference Library: All References

Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves

  • Posted on: Tue, 03/29/2016 - 16:36
  • By: petert

We show that death by dissolution is an important size-dependent mortality factor for juvenile bivalves. Utilizing a new experimental design, we were able to replicate saturation states in sediments after values frequently encountered by Mercenaria mercenaria in coastal deposits (Ωaragonite = 0.4 and 0.6). When 0.2-mm M. mercenariawere reared in sediments at Ωaragonite = 0.4 ...

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 ...

Short- and long-term consequences of larval stage exposure to constantly and ephemerally elevated carbon dioxide for marine bivalve populations

  • Posted on: Tue, 03/29/2016 - 16:19
  • By: petert

While larval bivalves are highly sensitive to ocean acidification, the basis for this sensitivity and the longer-term implications of this sensitivity are unclear. Experiments were performed to assess the short-term (days) and long-term (months) consequences of larval stage exposure to varying CO2 concentrations for calcifying bivalves. Higher CO2 concentrations depressed ...

Ocean acidification of the Greater Caribbean Region 1996-2006

  • Posted on: Tue, 03/29/2016 - 16:15
  • By: petert

The global oceans serve as the largest sustained natural sink for increasing atmospheric carbon dioxide (CO2) concentrations. As this CO2 is absorbed by seawater, it not only reacts causing a reduction in seawater pH (or acidification) but also decreases the carbonate mineral saturation state (Ω), which plays an important role in ...

Effect of ocean acidification on marine fish sperm (Baltic cod: Gadus morhua)

  • Posted on: Tue, 03/29/2016 - 16:08
  • By: petert

Ocean acidification, as a consequence of increasing marine pCO2, may have severe effects on the physiology of marine organisms. However, experimental studies remain scarce, in particular concerning fish. While adults will most likely remain relatively unaffected by changes in seawater pH, early life-history stages are potentially more sensitive – particularly the ...

Impacts of ocean acidification on marine fauna and ecosystem processes

  • Posted on: Tue, 03/29/2016 - 16:02
  • By: petert

Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and regions that intersect with pronounced hypoxic ...

Climate Change Impacts on Marine Ecosystems

  • Posted on: Tue, 03/29/2016 - 15:57
  • By: petert

In marine ecosystems, rising atmospheric CO2 and climate change are associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification, with potentially wide-ranging biological effects. Population-level shifts are occurring because of physiological intolerance to new environments, altered dispersal patterns, and changes in species interactions. Together with ...

Ocean Acidification: The Other CO2 Problem

  • Posted on: Tue, 03/29/2016 - 14:50
  • By: petert

Rising atmospheric carbon dioxide (CO2), primarily from human fossil fuel combustion, reduces ocean pH and causes wholesale shifts in seawater carbonate chemistry. The process of ocean acidification is well documented in field data, and the rate will accelerate over this century unless future CO2 emissions are curbed dramatically. Acidification alters ...

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