Articles | Volume 13, issue 7
https://doi.org/10.5194/bg-13-2179-2016
https://doi.org/10.5194/bg-13-2179-2016
Research article
 | 
13 Apr 2016
Research article |  | 13 Apr 2016

Effects of in situ CO2 enrichment on structural characteristics, photosynthesis, and growth of the Mediterranean seagrass Posidonia oceanica

T. Erin Cox, Frédéric Gazeau, Samir Alliouane, Iris E. Hendriks, Paul Mahacek, Arnaud Le Fur, and Jean-Pierre Gattuso

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The ocean absorbs atmospheric carbon dioxide (CO2) which increases the concentrations of CO2 and decreases pH in a process called ocean acidification. Because seagrass rely on carbon for photosynthesis they are expected to benefit under future ocean acidification. We manipulated pH in a Posidonia oceanica seagrass meadow. Seagrass traits, photosynthesis, and growth were not affected. Any benefit from ocean acidification over the next century on Posidonia physiology and growth may be minimal.
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