Early reproductive stages in the crustose coralline alga Phymatolithon lenormandii are strongly affected by mild acidification

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

In the early life stages of a coralline alga, mortality and growth abnormalities increased with small changes in pH. However, rate of growth remained similar, potentially by re-directing energy from other life processes. (Laboratory study)

Extensive dissolution of live pteropods in the Southern Ocean

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

When scientists collected pteropods living in the Southern Ocean, where high levels of CO2 caused low availability of calcium carbonate in the water for building shells, they found that the pteropods' shells had severely dissolved. In the laboratory, pteropods incubated under similar CO2 conditions had equivalent levels of dissolution. ...

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 ...

Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2

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

The calcium carbonate skeleton of a coralline red alga was estimated to become highly vulnerable to dissolving at an aragonite saturation state between 1.1 and 0.9, which is projected to occur in some parts of the Arctic between 2030 and 2050 if carbon emissions follow "business as usual" scenarios. (Laboratory ...

The effect of chronic and acute low pH on the intracellular DMSP production and epithelial cell morphology of red coralline algae

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

The release of dimethylsulphoniopropionate (DMSP) by marine algae has major impacts on the global sulphur cycle and may influence local climate through the formation of dimethylsulphide (DMS). However, the effect of global change on DMSP/DMS (DMS(P)) production by algae is not well understood. This study examined the effect of low pH ...

Larvae of the pteropod Cavolinia inflexa exposed to aragonite undersaturation are viable but shell-less

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

When larvae of Mediterranean pteropods were cultured in pH 7.82 water, they had malformations and less shell growth. At pH 7.51, the larvae did not make shells but survived and showed normal development. In a natural setting, the smaller shells or lack of shells would have both ecological and biogeochemical ...

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