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    Biomineralization changes with food supply confer juvenile scallops (Argopecten purpuratus) resistance to ocean acidification

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    Ramajo_et_al-Global_Change_Biology.pdf
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    Type
    Article
    Authors
    Ramajo, Laura
    Marbà, Núria
    Prado, Luis
    Peron, Sophie
    Lardies, Marco A.
    Rodriguez-Navarro, Alejandro
    Vargas, Cristian A.
    Lagos, Nelson A.
    Duarte, Carlos M. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2016-03-31
    Online Publication Date
    2016-03-31
    Print Publication Date
    2016-06
    Permanent link to this record
    http://hdl.handle.net/10754/584003
    
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    Abstract
    Future ocean acidification (OA) will affect physiological traits of marine species, with calcifying species being particularly vulnerable. As OA entails high energy demands, particularly during the rapid juvenile growth phase, food supply may play a key role in the response of marine organisms to OA. We experimentally evaluated the role of food supply in modulating physiological responses and biomineralization processes in juveniles of the Chilean scallop, Argopecten purpuratus, that were exposed to control (pH ~ 8.0) and low pH (pH ~ 7.6) conditions using three food supply treatments (high, intermediate, and low). We found that pH and food levels had additive effects on the physiological response of the juvenile scallops. Metabolic rates, shell growth, net calcification, and ingestion rates increased significantly at low pH conditions, independent of food. These physiological responses increased significantly in organisms exposed to intermediate and high levels of food supply. Hence, food supply seems to play a major role modulating organismal response by providing the energetic means to bolster the physiological response of OA stress. On the contrary, the relative expression of chitin synthase, a functional molecule for biomineralization, increased significantly in scallops exposed to low food supply and low pH, which resulted in a thicker periostracum enriched with chitin polysaccharides. Under reduced food and low pH conditions, the adaptive organismal response was to trade-off growth for the expression of biomineralization molecules and altering of the organic composition of shell periostracum, suggesting that the future performance of these calcifiers will depend on the trajectories of both OA and food supply. Thus, incorporating a suite of traits and multiple stressors in future studies of the adaptive organismal response may provide key insights on OA impacts on marine calcifiers.
    Citation
    Biomineralization changes with food supply confer juvenile scallops (Argopecten purpuratus) resistance to ocean acidification 2015:n/a Global Change Biology
    Publisher
    Wiley
    Journal
    Global Change Biology
    DOI
    10.1111/gcb.13179
    PubMed ID
    26644007
    Additional Links
    http://doi.wiley.com/10.1111/gcb.13179
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    • [Dataset]
      Ramajo, L., Marba, N., Prado, L., Peron, S., Lardies, M. A., Rodriguez-Navarro, A., … Duarte, C. M. (2016). Biomineralization changes with food supply confer juvenile scallops (Argopecten purpuratus) resistance to ocean acidification, supplement to: Ramajo, L; Marba, Núria; Prado, Luis; Peron, Sophie; Lardies, Marco A; Rodriguez-Navarro, Alejandro; Vargas, C A; Lagos, Nelson A; Duarte, Carlos M (2016): Biomineralization changes with food supply confer juvenile scallops (Argopecten purpuratus) resistance to ocean acidification. Global Change Biology, 22(6), 2025-2037 [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/pangaea.860506. DOI: 10.1594/PANGAEA.860506 HANDLE: 10754/624159
    ae974a485f413a2113503eed53cd6c53
    10.1111/gcb.13179
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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