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    Geographically conserved rates of background mortality among common reef-building corals in Lhaviyani Atoll, Maldives, versus northern Great Barrier Reef, Australia

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    Authors
    Pisapia, Chiara
    Sweet, Michael J. cc
    Sweatman, Hugh
    Pratchett, Morgan cc
    Affiliation
    University of Derby
    Issue Date
    2015-07-14
    
    Metadata
    Show full item record
    Abstract
    Even in the absence of major disturbances (e.g., cyclones and bleaching), corals are consistently subject to high levels of background mortality, which under-mines individual fitness and resilience of coral colonies. Most studies of coral mortality however only focus on catastrophic mortality associated with major acute disturbance events, neglecting to consider background levels of chronic mortality that have a significant influence on population structure and turnover. If, for example, there are geo-graphic differences in the prevalence of injuries and rates of background mortality, coral communities may vary in their susceptibility to acute large-scale disturbances and environmental change. This study quantified the prevalence and severity of partial mortality for four dominant and widespread coral taxa (massive Porites, encrusting Montipora, Acropora hyacinthus,and branching Pocillopora) at Lhaviyani Atoll, Maldives, and on the northern Great Barrier Reef, Australia. The prevalence and severity of sublethal injuries varied greatly among taxa, but was generally similar between locations; on the Great Barrier Reef, 99.4 % Porites colonies, 66 % of A. hyacinthus, and 64 % of Pocillopora had conspicuous injuries, compared to 92.4 % of Porites, 47.5 % of A. hyacinthus, and 44 % of Pocillopora colonies in Lhaviyani Atoll. These results suggest that background rates of mortality and injury, and associated resilience of coral populations and communities to large-scale disturbances, are conserved at large geo-graphic scales, though adjacent colonies can have markedly different injury regimes, likely to lead to strong intraspecific variation in colony fitness and resilience.
    Citation
    Pisapia, C, Sweet, M, Sweatman, H, & Pratchett, M 2015, 'Geographically conserved rates of background mortality among common reef-building corals in Lhaviyani Atoll, Maldives, versus northern Great Barrier Reef, Australia', Marine Biology, 8, p. 1579
    Publisher
    Springer Berlin Heidelberg
    Journal
    Marine Biology
    URI
    http://hdl.handle.net/10545/583329
    DOI
    10.1007/s00227-015-2694-9
    Additional Links
    http://link.springer.com/10.1007/s00227-015-2694-9
    Type
    Article
    Language
    en
    Series/Report no.
    Vol. 162
    Issue. 8
    ISSN
    0025-3162
    1432-1793
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00227-015-2694-9
    Scopus Count
    Collections
    Environmental Sustainability Research Centre

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