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Subject:

Re: Definition of Aquatic Ecosystems

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Academic forum on fisheries ecology and related topics <[log in to unmask]>

Date:

Fri, 13 Sep 1996 15:16:35 EST

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     I don't think that there can be a simple definition of an
     aquatic ecosystem. There are different types of aquatic
     ecosystems. For example, Sherman and Alexander define a
     "Large Marine Ecosystems" as relatively large regions of the
     global EEZs generally on the order of >200,000 sq. km.,
     characterized by unique bathymetry, hydrography, and
     productivity, within which marine populations have adapted
     reproductive, growth, and feeding strategies. (Sherman, K.,
     and L.M. Alexander (editors). 1986. Variability and
     management of large marine ecosystems. AAAS Selected
     Symposium 99. Westview Press, Boulder, CO. 319pp.) It is
     clear, however, that the boundaries of Large Marine
     Ecosystems and not firmly fixed and can extend far inland up
     river basins.


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