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Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community

We studied the effect of ocean acidification (OA) on a coastal North Sea plankton community in a long-term mesocosm CO(2)-enrichment experiment (BIOACID II long-term mesocosm study). From March to July 2013, 10 mesocosms of 19 m length with a volume of 47.5 to 55.9 m(3) were deployed in the Gullmar...

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Autores principales: Eberlein, Tim, Wohlrab, Sylke, Rost, Björn, John, Uwe, Bach, Lennart T., Riebesell, Ulf, Van de Waal, Dedmer B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5342202/
https://www.ncbi.nlm.nih.gov/pubmed/28273107
http://dx.doi.org/10.1371/journal.pone.0172594
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author Eberlein, Tim
Wohlrab, Sylke
Rost, Björn
John, Uwe
Bach, Lennart T.
Riebesell, Ulf
Van de Waal, Dedmer B.
author_facet Eberlein, Tim
Wohlrab, Sylke
Rost, Björn
John, Uwe
Bach, Lennart T.
Riebesell, Ulf
Van de Waal, Dedmer B.
author_sort Eberlein, Tim
collection PubMed
description We studied the effect of ocean acidification (OA) on a coastal North Sea plankton community in a long-term mesocosm CO(2)-enrichment experiment (BIOACID II long-term mesocosm study). From March to July 2013, 10 mesocosms of 19 m length with a volume of 47.5 to 55.9 m(3) were deployed in the Gullmar Fjord, Sweden. CO(2) concentrations were enriched in five mesocosms to reach average CO(2) partial pressures (pCO(2)) of 760 μatm. The remaining five mesocosms were used as control at ambient pCO(2) of 380 μatm. Our paper is part of a PLOS collection on this long-term mesocosm experiment. Here, we here tested the effect of OA on total primary production (PP(T)) by performing (14)C-based bottle incubations for 24 h. Furthermore, photoacclimation was assessed by conducting (14)C-based photosynthesis-irradiance response (P/I) curves. Changes in chlorophyll a concentrations over time were reflected in the development of PP(T), and showed higher phytoplankton biomass build-up under OA. We observed two subsequent phytoplankton blooms in all mesocosms, with peaks in PP(T) around day 33 and day 56. OA had no significant effect on PP(T), except for a marginal increase during the second phytoplankton bloom when inorganic nutrients were already depleted. Maximum light use efficiencies and light saturation indices calculated from the P/I curves changed simultaneously in all mesocosms, and suggest that OA did not alter phytoplankton photoacclimation. Despite large variability in time-integrated productivity estimates among replicates, our overall results indicate that coastal phytoplankton communities can be affected by OA at certain times of the seasonal succession with potential consequences for ecosystem functioning.
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spelling pubmed-53422022017-03-29 Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community Eberlein, Tim Wohlrab, Sylke Rost, Björn John, Uwe Bach, Lennart T. Riebesell, Ulf Van de Waal, Dedmer B. PLoS One Research Article We studied the effect of ocean acidification (OA) on a coastal North Sea plankton community in a long-term mesocosm CO(2)-enrichment experiment (BIOACID II long-term mesocosm study). From March to July 2013, 10 mesocosms of 19 m length with a volume of 47.5 to 55.9 m(3) were deployed in the Gullmar Fjord, Sweden. CO(2) concentrations were enriched in five mesocosms to reach average CO(2) partial pressures (pCO(2)) of 760 μatm. The remaining five mesocosms were used as control at ambient pCO(2) of 380 μatm. Our paper is part of a PLOS collection on this long-term mesocosm experiment. Here, we here tested the effect of OA on total primary production (PP(T)) by performing (14)C-based bottle incubations for 24 h. Furthermore, photoacclimation was assessed by conducting (14)C-based photosynthesis-irradiance response (P/I) curves. Changes in chlorophyll a concentrations over time were reflected in the development of PP(T), and showed higher phytoplankton biomass build-up under OA. We observed two subsequent phytoplankton blooms in all mesocosms, with peaks in PP(T) around day 33 and day 56. OA had no significant effect on PP(T), except for a marginal increase during the second phytoplankton bloom when inorganic nutrients were already depleted. Maximum light use efficiencies and light saturation indices calculated from the P/I curves changed simultaneously in all mesocosms, and suggest that OA did not alter phytoplankton photoacclimation. Despite large variability in time-integrated productivity estimates among replicates, our overall results indicate that coastal phytoplankton communities can be affected by OA at certain times of the seasonal succession with potential consequences for ecosystem functioning. Public Library of Science 2017-03-08 /pmc/articles/PMC5342202/ /pubmed/28273107 http://dx.doi.org/10.1371/journal.pone.0172594 Text en © 2017 Eberlein et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Eberlein, Tim
Wohlrab, Sylke
Rost, Björn
John, Uwe
Bach, Lennart T.
Riebesell, Ulf
Van de Waal, Dedmer B.
Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title_full Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title_fullStr Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title_full_unstemmed Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title_short Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community
title_sort effects of ocean acidification on primary production in a coastal north sea phytoplankton community
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5342202/
https://www.ncbi.nlm.nih.gov/pubmed/28273107
http://dx.doi.org/10.1371/journal.pone.0172594
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