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    Heterotrophy of oceanic particulate organic matter elevates net ecosystem calcification

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    Article (2.855Mb)
    Supporting_Information_S1 (571.0Kb)
    Data_Set_S1 (22.09Kb)
    Date
    2019-08-22
    Author
    Kealoha, Andrea K.  Concept link
    Shamberger, Kathryn E. F.  Concept link
    Reid, Emma C.  Concept link
    Davis, Kristen A.  Concept link
    Lentz, Steven J.  Concept link
    Brainard, Russell E.  Concept link
    Oliver, Thomas A.  Concept link
    Rappe, Michael S.  Concept link
    Roark, E. Brendan  Concept link
    Rii, Yoshimi M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/25288
    As published
    https://doi.org/10.1029/2019GL083726
    DOI
    10.1029/2019GL083726
    Keyword
     coral reefs; ocean acidification; climate change; heterotrophy 
    Abstract
    Coral reef calcification is expected to decline due to climate change stressors such as ocean acidification and warming. Projections of future coral reef health are based on our understanding of the environmental drivers that affect calcification and dissolution. One such driver that may impact coral reef health is heterotrophy of oceanic‐sourced particulate organic matter, but its link to calcification has not been directly investigated in the field. In this study, we estimated net ecosystem calcification and oceanic particulate organic carbon (POCoc) uptake across the Kāne'ohe Bay barrier reef in Hawai'i. We show that higher rates of POCoc uptake correspond to greater net ecosystem calcification rates, even under low aragonite saturation states (Ωar). Hence, reductions in offshore productivity may negatively impact coral reefs by decreasing the food supply required to sustain calcification. Alternatively, coral reefs that receive ample inputs of POCoc may maintain higher calcification rates, despite a global decline in Ωar.
    Description
    Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 46(16), (2019): 9851-9860, doi:10.1029/2019GL083726.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Kealoha, A. K., Shamberger, K. E. F., Reid, E. C., Davis, K. A., Lentz, S. J., Brainard, R. E., Oliver, T. A., Rappe, M. S., Roark, E. B., & Rii, Y. M. (2019). Heterotrophy of oceanic particulate organic matter elevates net ecosystem calcification. Geophysical Research Letters, 46(16), 9851-9860.
     

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