Effects of Reduced pH on Macoma balthica Larvae from a System with Naturally Fluctuating pH-Dynamics

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dc.contributor.author Jansson, Anna
dc.contributor.author Norkko, Joanna
dc.contributor.author Norkko, Alf
dc.date.accessioned 2016-06-21T10:04:01Z
dc.date.available 2016-06-21T10:04:01Z
dc.date.issued 2013-06-26
dc.identifier.citation Jansson , A , Norkko , J & Norkko , A 2013 , ' Effects of Reduced pH on Macoma balthica Larvae from a System with Naturally Fluctuating pH-Dynamics ' , PLoS One , vol. 8 , no. 6 , e68198 . https://doi.org/10.1371/journal.pone.0068198
dc.identifier.other PURE: 28167913
dc.identifier.other PURE UUID: c3771c00-a81e-465a-a6c5-c8e5898db02a
dc.identifier.other WOS: 000321424400133
dc.identifier.other Scopus: 84879480008
dc.identifier.other ORCID: /0000-0001-9885-8408/work/29326886
dc.identifier.uri http://hdl.handle.net/10138/164406
dc.description.abstract Ocean acidification is causing severe changes in the inorganic carbon balance of the oceans. The pH conditions predicted for the future oceans are, however, already regularly occurring in the Baltic Sea, and the system might thus work as an analogue for future ocean acidification scenarios. The characteristics of the Baltic Sea with low buffering capacity and large natural pH fluctuations, in combination with multiple other stressors, suggest that OA effects may be severe, but remain largely unexplored. A calcifying species potentially affected by low pH conditions is the bivalve Macoma balthica (L.). We investigated larval survival and development of M. balthica by exposing the larvae to a range of pH levels: 7.2, 7.4, 7.7 and 8.1 during 20 days in order to learn what the effects of reduced pH are on the larval biology and thus also potentially for the population dynamics of this key species. We found that even a slight pH decrease causes significant negative changes during the larval phase, both by slowing growth and by decreasing survival. The growth was slower in all reduced pH treatments compared to the control treatment. The size of 250 µm that is considered indicative to imminent settling in our system was reached by 22% of the larvae grown in control conditions after 20 days, whereas in all reduced pH treatments the size of 250 µm was reached by only 7–14%. The strong impact of ocean acidification on larvae is alarming as slowly growing individuals are exposed to higher predation risk in response to the longer time they are required to spend in the plankton, further decreasing the ecological competence of the species. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof PLoS One
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1181 Ecology, evolutionary biology
dc.title Effects of Reduced pH on Macoma balthica Larvae from a System with Naturally Fluctuating pH-Dynamics en
dc.type Article
dc.contributor.organization Tvärminne Zoological Station
dc.contributor.organization Marine Ecosystems Research Group
dc.contributor.organization Tvärminne Benthic Ecology Team
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1371/journal.pone.0068198
dc.relation.issn 1932-6203
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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