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    Bathymetric zonation of deep-sea macrofauna in relation to export of surface phytoplankton production

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    Supplementary material (63.86Kb)
    Date
    2010-01-28
    Author
    Wei, Chih-Lin  Concept link
    Rowe, Gilbert T.  Concept link
    Hubbard, G. Fain  Concept link
    Scheltema, Amelie H.  Concept link
    Wilson, George D. F.  Concept link
    Petrescu, Iorgu  Concept link
    Foster, John M.  Concept link
    Wicksten, Mary K.  Concept link
    Chen, Min  Concept link
    Davenport, Roe  Concept link
    Soliman, Yousria  Concept link
    Wang, Yuning  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4483
    As published
    https://doi.org/10.3354/meps08388
    DOI
    10.3354/meps08388
    Keyword
     Northern Gulf of Mexico; Deep sea; Macrofauna; Zonation; Biogeography; Community structure; POC export flux; Macroecology 
    Abstract
    Macrobenthos of the deep, northern Gulf of Mexico (GoM) was sampled with box cores (0.2 m2) along multiple cross-depth transects extending from depths of 200 m to the maximum depth of the basin at 3700 m. Bathymetric (depth) zonation of the macrofaunal community was documented for 6 major taxa (a total of 957 species) on the basis of shared species among geographic locations; 4 major depth zones were identified, with the 2 intermediate-depth zones being divided into east and west subzones. Change of faunal composition with depth reflects an underlying continuum of species replacements without distinct boundaries. The zonal patterns correlated with depth and detrital particulate organic carbon (POC) export flux estimated from remotely-sensed phytoplankton pigment concentrations in the surface water. The Mississippi River and its associated mesoscale eddies, submarine canyon, and deep sediment fan appear to influence the horizontal zonation pattern through export of organic carbon from the ocean surface and the adjacent continental margin. On the local scale, near-bottom currents may shape the zonation pattern by altering sediment grain size, food availability, and larval dispersal. This study suggests a macroecological relationship between depth, export POC flux, and zonation; parsimonious zonal thresholds need to be tested independently for other continental margin ecosystems.
    Description
    Author Posting. © Inter-Research, 2010. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 399 (2010): 1-14, doi:10.3354/meps08388.
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    • Biology
    Suggested Citation
    Marine Ecology Progress Series 399 (2010): 1-14
     

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