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No detectable effect of ocean acidification on plankton metabolism in the NW oligotrophic Mediterranean Sea: Results from two mesocosm studies

No detectable effect of ocean acidification on plankton metabolism in the NW oligotrophic Mediterranean Sea: Results from two mesocosm studies
No detectable effect of ocean acidification on plankton metabolism in the NW oligotrophic Mediterranean Sea: Results from two mesocosm studies
Oligotrophic areas account for about 30% of oceanic primary production and are projected to expand in a warm, high-CO2 world. Changes in primary production in these areas could have important impacts on future global carbon cycling. To assess the response of primary production and respiration of plankton communities to increasing partial pressure of CO2 (pCO2) levels in Low Nutrient Low Chorophyll areas, two mesocosm experiments were conducted in the Bay of Calvi (Corsica, France) and in the Bay of Villefranche (France) in June–July 2012 and February–March 2013 under different trophic state, temperature and irradiance conditions. Nine mesocosms of 50 m3 were deployed for 20 and 12 days, respectively, and were subjected to seven pCO2 levels (3 control and 6 elevated levels). The metabolism of the community was studied using several methods based on in situ incubations (oxygen light–dark, 18O and 14C uptake). Increasing pCO2 had no significant effect on gross primary production, net community production, particulate and dissolved carbon production, as well as on community respiration. These two mesocosm experiments, the first performed under maintained low nutrient and low chlorophyll, suggest that in large areas of the ocean, increasing pCO2 levels may not lead to a significant change in plankton metabolic rates and sea surface biological carbon fixation.
ocean acidification, plankton communities, metabolic rates, mesocosm experiments, Mediterranean Sea
0272-7714
89-99
Maugendre, L.
936326b9-d89f-4d2f-8869-96bd4c64ec99
Gattuso, J.-P.
07f69a1b-2104-4549-87e1-184152cee817
Poulton, A.J.
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Dellisanti, W.
98739b13-e8aa-4cac-b111-86cba3e35aa2
Gaubert, M.
2b8756bc-1736-48fa-b71c-5856754dbb32
Guieu, C.
381151d6-5fff-4839-8217-62b20a254ca5
Gazeau, F.
68649141-7dba-430c-bc06-1ec03b1a0f99
Maugendre, L.
936326b9-d89f-4d2f-8869-96bd4c64ec99
Gattuso, J.-P.
07f69a1b-2104-4549-87e1-184152cee817
Poulton, A.J.
14bf64a7-d617-4913-b882-e8495543e717
Dellisanti, W.
98739b13-e8aa-4cac-b111-86cba3e35aa2
Gaubert, M.
2b8756bc-1736-48fa-b71c-5856754dbb32
Guieu, C.
381151d6-5fff-4839-8217-62b20a254ca5
Gazeau, F.
68649141-7dba-430c-bc06-1ec03b1a0f99

Maugendre, L., Gattuso, J.-P., Poulton, A.J., Dellisanti, W., Gaubert, M., Guieu, C. and Gazeau, F. (2017) No detectable effect of ocean acidification on plankton metabolism in the NW oligotrophic Mediterranean Sea: Results from two mesocosm studies. Estuarine, Coastal and Shelf Science, 186 (A), 89-99. (doi:10.1016/j.ecss.2015.03.009).

Record type: Article

Abstract

Oligotrophic areas account for about 30% of oceanic primary production and are projected to expand in a warm, high-CO2 world. Changes in primary production in these areas could have important impacts on future global carbon cycling. To assess the response of primary production and respiration of plankton communities to increasing partial pressure of CO2 (pCO2) levels in Low Nutrient Low Chorophyll areas, two mesocosm experiments were conducted in the Bay of Calvi (Corsica, France) and in the Bay of Villefranche (France) in June–July 2012 and February–March 2013 under different trophic state, temperature and irradiance conditions. Nine mesocosms of 50 m3 were deployed for 20 and 12 days, respectively, and were subjected to seven pCO2 levels (3 control and 6 elevated levels). The metabolism of the community was studied using several methods based on in situ incubations (oxygen light–dark, 18O and 14C uptake). Increasing pCO2 had no significant effect on gross primary production, net community production, particulate and dissolved carbon production, as well as on community respiration. These two mesocosm experiments, the first performed under maintained low nutrient and low chlorophyll, suggest that in large areas of the ocean, increasing pCO2 levels may not lead to a significant change in plankton metabolic rates and sea surface biological carbon fixation.

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Maugendre et al_2015_accepted.pdf - Accepted Manuscript
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Accepted/In Press date: 12 March 2015
Published date: 15 February 2017
Keywords: ocean acidification, plankton communities, metabolic rates, mesocosm experiments, Mediterranean Sea
Organisations: Marine Biogeochemistry, Ocean Biochemistry & Ecosystems, National Oceanography Centre

Identifiers

Local EPrints ID: 388160
URI: https://eprints.soton.ac.uk/id/eprint/388160
ISSN: 0272-7714
PURE UUID: 60fa5e88-1945-47a6-936a-3493cbf7fa92

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Date deposited: 19 Feb 2016 11:48
Last modified: 10 Dec 2019 06:37

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