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    Human activity selectively impacts the ecosystem roles of parrotfishes on coral reefs

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    Type
    Article
    Authors
    Bellwood, David R.
    Hoey, Andrew
    Hughes, Terence P.
    KAUST Department
    Red Sea Research Center (RSRC)
    Date
    2011-11-16
    Online Publication Date
    2011-11-16
    Print Publication Date
    2012-04-22
    Permanent link to this record
    http://hdl.handle.net/10754/561924
    
    Metadata
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    Abstract
    Around the globe, coral reefs and other marine ecosystems are increasingly overfished. Conventionally, studies of fishing impacts have focused on the population size and dynamics of targeted stocks rather than the broader ecosystem-wide effects of harvesting. Using parrotfishes as an example, we show how coral reef fish populations respond to escalating fishing pressure across the Indian and Pacific Oceans. Based on these fish abundance data, we infer the potential impact on four key functional roles performed by parrotfishes. Rates of bioerosion and coral predation are highly sensitive to human activity, whereas grazing and sediment removal are resilient to fishing. Our results offer new insights into the vulnerability and resilience of coral reefs to the ever-growing human footprint. The depletion of fishes causes differential decline of key ecosystem functions, radically changing the dynamics of coral reefs and setting the stage for future ecological surprises. © 2011 The Royal Society.
    Sponsors
    We thank J. Tanner, S. Wismer, J. Hodge and M. Sheaves for technical assistance, and N. Graham, M. Pratchett, J. Cinner, S. Foale and two anonymous reviewers for helpful discussions or comments on earlier drafts. This work was supported by the Australian Research Council.
    Publisher
    The Royal Society
    Journal
    Proceedings of the Royal Society B: Biological Sciences
    DOI
    10.1098/rspb.2011.1906
    PubMed ID
    22090383
    PubMed Central ID
    PMC3282342
    Additional Links
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3282342
    ae974a485f413a2113503eed53cd6c53
    10.1098/rspb.2011.1906
    Scopus Count
    Collections
    Articles; Red Sea Research Center (RSRC)

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