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    Comparative depth distribution of corallimorpharians and scleractinians (Cnidaria: Anthozoa)

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    FautinD_MEPS_(397)63.pdf (284.6Kb)
    Issue Date
    2009-11-17
    Author
    Fautin, Daphne G.
    Guinotte, John M.
    Orr, James C.
    Publisher
    Inter Research
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We assessed whether CaCO3 concentration of seawater may be relevant to the occurrence of members of Corallimorpharia and Scleractinia, which are very similar except for the possession by scleractinians of a calcareous skeleton. In collections of both the Challenger Deep-sea Expedition 1872–1876 and the US Antarctic (Research) Program, average depth of occurrence was significantly greater for corallimorpharians than for scleractinians. We also compared depth of occurrence relative to the position of the aragonite saturation horizon (ASH) at many localities from which specimens were collected. Nearly 25 and 50% of stations at which scleractinians were collected were below the ASH for the Antarctic and Challenger stations, respectively; 50 and 100% of the Antarctic and Challenger stations at which corallimorpharians were collected were below the ASH, respectively. Statistical analyses of these data to test whether there is a difference in the depth, relative to the ASH, at which scleractinians and corallimorpharians occur indicate a difference for the Challenger but not the Antarctic stations; more data are needed. The scleractinians that tolerate living below the ASH belong to a minority of the genera recorded in the surveys, and do not include species considered important in forming bioherms; those that occur deepest are solitary. Some deep-sea scleractinians may be unaffected by shoaling of the ASH that is predicted across all ocean basins in the near future, some may be confined to water shallower than is now the case, and others may cease producing a skeleton, becoming morphologically indistinguishable from corallimorpharians.
    URI
    http://hdl.handle.net/1808/16485
    DOI
    https://doi.org/10.3354/meps08271
    ISSN
    0171-8630
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1516]
    Citation
    Fautin, Daphne G.; Guinotte, John M.; Orr, James C. (2009). "Comparative depth distribution of corallimorpharians and scleractinians (Cnidaria: Anthozoa)." Marine Ecology Progress Series, 379:63-70. http://www.dx.doi.org/10.3354/meps08271

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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