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Historical baselines and the future of shell calcification for a foundation species in a changing ocean

Proceedings of the Royal Society. B, Biological sciences, 2016-06, Vol.283 (1832), p.20160392-20160392 [Peer Reviewed Journal]

2016 The Author(s) ;2016 The Author(s). ;2016 The Author(s) 2016 ;ISSN: 0962-8452 ;EISSN: 1471-2954 ;DOI: 10.1098/rspb.2016.0392 ;PMID: 27306049

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  • Title:
    Historical baselines and the future of shell calcification for a foundation species in a changing ocean
  • Author: Pfister, Catherine A. ; Roy, Kaustuv ; Wootton, J. Timothy ; McCoy, Sophie J. ; Paine, Robert T. ; Suchanek, Thomas H. ; Sanford, Eric
  • Subjects: Animal Shells - chemistry ; Animals ; Calcification, Physiologic ; California ; California Current Large Marine Ecosystem ; California Mussel ; Hydrogen-Ion Concentration ; Mytilus - growth & development ; Mytilus californianus ; Ocean Acidification ; Ocean Ph ; Oceans and Seas ; Seawater - chemistry ; Shell Thickness
  • Is Part Of: Proceedings of the Royal Society. B, Biological sciences, 2016-06, Vol.283 (1832), p.20160392-20160392
  • Description: Seawater pH and the availability of carbonate ions are decreasing due to anthropogenic carbon dioxide emissions, posing challenges for calcifying marine species. Marine mussels are of particular concern given their role as foundation species worldwide. Here, we document shell growth and calcification patterns in Mytilus californianus, the California mussel, over millennial and decadal scales. By comparing shell thickness across the largest modern shells, the largest mussels collected in the 1960sā€“1970s and shells from two Native American midden sites (āˆ¼1000ā€“2420 years BP), we found that modern shells are thinner overall, thinner per age category and thinner per unit length. Thus, the largest individuals of this species are calcifying less now than in the past. Comparisons of shell thickness in smaller individuals over the past 10ā€“40 years, however, do not show significant shell thinning. Given our sampling strategy, these results are unlikely to simply reflect within-site variability or preservation effects. Review of environmental and biotic drivers known to affect shell calcification suggests declining ocean pH as a likely explanation for the observed shell thinning. Further future decreases in shell thickness could have significant negative impacts on M. californianus survival and, in turn, negatively impact the species-rich complex that occupies mussel beds.
  • Publisher: England: The Royal Society
  • Language: English
  • Identifier: ISSN: 0962-8452
    EISSN: 1471-2954
    DOI: 10.1098/rspb.2016.0392
    PMID: 27306049
  • Source: Open Access: PubMed Central
    MEDLINE
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