Macroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuations

Handle URI:
http://hdl.handle.net/10754/625147
Title:
Macroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuations
Authors:
Wahl, M. ( 0000-0001-8703-3857 ) ; Schneider Covachã, S.; Saderne, Vincent; Hiebenthal, C.; Müller, J. D. ( 0000-0003-3137-0883 ) ; Pansch, C.; Sawall, Y.
Abstract:
Ocean acidification (OA) is generally assumed to negatively impact calcification rates of marine organisms. At a local scale however, biological activity of macrophytes may generate pH fluctuations with rates of change that are orders of magnitude larger than the long-term trend predicted for the open ocean. These fluctuations may in turn impact benthic calcifiers in the vicinity. Combining laboratory, mesocosm and field studies, such interactions between OA, the brown alga Fucus vesiculosus, the sea grass Zostera marina and the blue mussel Mytilus edulis were investigated at spatial scales from decimetres to 100s of meters in the western Baltic. Macrophytes increased the overall mean pH of the habitat by up to 0.3 units relative to macrophyte-free, but otherwise similar, habitats and imposed diurnal pH fluctuations with amplitudes ranging from 0.3 to more than 1 pH unit. These amplitudes and their impact on mussel calcification tended to increase with increasing macrophyte biomass to bulk water ratio. At the laboratory and mesocosm scales, biogenic pH fluctuations allowed mussels to maintain calcification even under acidified conditions by shifting most of their calcification activity into the daytime when biogenic fluctuations caused by macrophyte activity offered temporal refuge from OA stress. In natural habitats with a low biomass to water body ratio, the impact of biogenic pH fluctuations on mean calcification rates of M. edulis was less pronounced. Thus, in dense algae or seagrass habitats, macrophytes may mitigate OA impact on mussel calcification by raising mean pH and providing temporal refuge from acidification stress.
KAUST Department:
King Abdullah University of Science and Technology (KAUST); Thuwal Saudi Arabia
Citation:
Wahl M, Schneider Covachã S, Saderne V, Hiebenthal C, Müller JD, et al. (2017) Macroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuations. Limnology and Oceanography. Available: http://dx.doi.org/10.1002/lno.10608.
Publisher:
Wiley-Blackwell
Journal:
Limnology and Oceanography
Issue Date:
26-Jun-2017
DOI:
10.1002/lno.10608
Type:
Article
ISSN:
0024-3590
Sponsors:
We wish to thank Björn Buchholz for technical support with the experimental set-up in the lab, Philipp Gremler for laboratory assistance and Jörn Thomsen for helpful advice in calcification issues. JDM received funding from the EU BONUS project PINBAL through Grant No. 03F0689A. Highly constructive comments and advice by two reviewers have substantially improved an earlier version of this article. We much appreciate this.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/lno.10608/full
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DC FieldValue Language
dc.contributor.authorWahl, M.en
dc.contributor.authorSchneider Covachã, S.en
dc.contributor.authorSaderne, Vincenten
dc.contributor.authorHiebenthal, C.en
dc.contributor.authorMüller, J. D.en
dc.contributor.authorPansch, C.en
dc.contributor.authorSawall, Y.en
dc.date.accessioned2017-07-03T11:45:32Z-
dc.date.available2017-07-03T11:45:32Z-
dc.date.issued2017-06-26en
dc.identifier.citationWahl M, Schneider Covachã S, Saderne V, Hiebenthal C, Müller JD, et al. (2017) Macroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuations. Limnology and Oceanography. Available: http://dx.doi.org/10.1002/lno.10608.en
dc.identifier.issn0024-3590en
dc.identifier.doi10.1002/lno.10608en
dc.identifier.urihttp://hdl.handle.net/10754/625147-
dc.description.abstractOcean acidification (OA) is generally assumed to negatively impact calcification rates of marine organisms. At a local scale however, biological activity of macrophytes may generate pH fluctuations with rates of change that are orders of magnitude larger than the long-term trend predicted for the open ocean. These fluctuations may in turn impact benthic calcifiers in the vicinity. Combining laboratory, mesocosm and field studies, such interactions between OA, the brown alga Fucus vesiculosus, the sea grass Zostera marina and the blue mussel Mytilus edulis were investigated at spatial scales from decimetres to 100s of meters in the western Baltic. Macrophytes increased the overall mean pH of the habitat by up to 0.3 units relative to macrophyte-free, but otherwise similar, habitats and imposed diurnal pH fluctuations with amplitudes ranging from 0.3 to more than 1 pH unit. These amplitudes and their impact on mussel calcification tended to increase with increasing macrophyte biomass to bulk water ratio. At the laboratory and mesocosm scales, biogenic pH fluctuations allowed mussels to maintain calcification even under acidified conditions by shifting most of their calcification activity into the daytime when biogenic fluctuations caused by macrophyte activity offered temporal refuge from OA stress. In natural habitats with a low biomass to water body ratio, the impact of biogenic pH fluctuations on mean calcification rates of M. edulis was less pronounced. Thus, in dense algae or seagrass habitats, macrophytes may mitigate OA impact on mussel calcification by raising mean pH and providing temporal refuge from acidification stress.en
dc.description.sponsorshipWe wish to thank Björn Buchholz for technical support with the experimental set-up in the lab, Philipp Gremler for laboratory assistance and Jörn Thomsen for helpful advice in calcification issues. JDM received funding from the EU BONUS project PINBAL through Grant No. 03F0689A. Highly constructive comments and advice by two reviewers have substantially improved an earlier version of this article. We much appreciate this.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/lno.10608/fullen
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleMacroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuationsen
dc.typeArticleen
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST); Thuwal Saudi Arabiaen
dc.identifier.journalLimnology and Oceanographyen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionGEOMAR Helmholtz Centre for Ocean research; Kiel Germanyen
dc.contributor.institutionLeibniz Institute for Baltic Sea Research; Warnemuende Germanyen
dc.contributor.institutionBermuda Institute of Ocean Sciences (BIOS); St. George's Bermudaen
kaust.authorSaderne, Vincenten
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