Effect of ocean acidification on the fatty acid composition of a natural plankton community

  • Posted on: Wed, 03/30/2016 - 12:09
  • By: petert

The effect of ocean acidification on the fatty acid composition of a natural plankton community in the Arctic was studied in a large-scale mesocosm experiment, carried out in Kongsfjorden (Svalbard, Norway) at 79° N. Nine mesocosms of ~50 m3 each were exposed to 8 different pCO2 levels (from natural background conditions to ~1420 ...

Decreased pH does not alter metamorphosis but compromises juvenile calcification of the tube worm Hydroides elegans

  • Posted on: Wed, 03/30/2016 - 12:06
  • By: petert

Using CO2 perturbation experiments, we examined the pre- and post-settlement growth responses of a dominant biofouling tubeworm (Hydroides elegans) to a range of pH. In three different experiments, embryos were reared to, or past, metamorphosis in seawater equilibrated to CO2 values of about 480 (control), 980, 1,480, and 2,300 latm ...

Meta-analysis reveals negative yet variable effects of ocean acidification on marine organisms

  • Posted on: Wed, 03/30/2016 - 12:01
  • By: petert

Ocean acidification is a pervasive stressor that could affect many marine organisms and cause profound ecological shifts. A variety of biological responses to ocean acidification have been measured across a range of taxa, but this information exists as case studies and has not been synthesized into meaningful comparisons amongst response ...

Climate change and ocean acidification effects on seagrasses and marine macroalgae

  • Posted on: Tue, 03/29/2016 - 17:09
  • By: petert

Although seagrasses and marine macroalgae (macro-autotrophs) play critical ecological roles in reef, lagoon, coastal and open-water ecosystems, their response to ocean acidification (OA) and climate change is not well understood. In this review, we examine marine macro-autotroph biochemistry and physiology relevant to their response to elevated dissolved inorganic carbon [DIC], ...

Ocean Acidification Decreases Growth and Development in American Lobster (Homarus americanus) Larvae

  • Posted on: Tue, 03/29/2016 - 17:03
  • By: petert

Ocean acidification resulting from the global increase in atmospheric CO2 concentration is emerging as a threat to marine species, including crustaceans. Fisheries involving the American lobster (Homarus americanus) are economically important in eastern Canada and United States. Based on ocean pH levels predicted for 2100, this study examined the effects ...

Adverse Effects of Ocean Acidification on Early Development of Squid (Doryteuthis pealeii)

  • Posted on: Tue, 03/29/2016 - 16:57
  • By: petert

Anthropogenic carbon dioxide (CO2) is being absorbed into the ocean, altering seawater chemistry, with potentially negative impacts on a wide range of marine organisms. The early life stages of invertebrates with internal and external aragonite structures may be particularly vulnerable to this ocean acidification. Impacts to cephalopods, which form aragonite ...

Acclimatization of the Crustose Coralline Alga Porolithon onkodes to Variable CO2

  • Posted on: Tue, 03/29/2016 - 16:49
  • By: petert

Ocean acidification (OA) has important implications for the persistence of coral reef ecosystems, due to potentially negative effects on biomineralization. Many coral reefs are dynamic with respect to carbonate chemistry, and experience fluctuations in pCO2 that exceed OA projections for the near future. To understand the influence of dynamic pCO2 on an ...

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 ...

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