Outline update

• To: Popcom@amazon.evsc.Virginia.EDU
• Subject: Outline update
• From: "R. Michael Erwin" <rme5g@virginia.edu>
• Date: Wed, 05 Feb 1997 10:37:20 -0500
• Resent-Date: Wed, 26 Feb 97 08:09:25 EST
• Resent-From: "III.3 ERWIN, MONCRIEF, PORTER" <BICHRIST@ECUVM.CIS.ECU.EDU>
• Resent-Message-Id: <9702261309.AA07310@amazon.evsc.Virginia.EDU>
• Resent-To: Synthesis book archives <syntharc@amazon.evsc.Virginia.EDU>

Feb. 1, 1997 version

           POPULATIONS, COMMUNITIES, AND BIODIVERSITY

        Draft Outline for Synthesis Volume Chapter/LTER


I.    Introduction
(What taxa are included, which are excluded and why)

II.   Descriptions of Populations & Communities

       A. Current status/distribution (relative to landscape units)
             - Plants
             - Herps
             - Birds
             - Mammals

        B.  Historic changes (extinctions/colonizations since European
colonization; recent range
         changes)

               By taxa (as above)

         C.  Evidence for endemism or subspecies classification on Virginia
eastern shore

III.   Diversity patterns and processes

        A. Broad scale patterns

         1.  Disturbance (effects on each taxon) - among islands;
island-mainland gradient

         2.  Habitat influences (effects on each taxon) - island area,
isolation, structural complexity

         3.  Longitudinal (peninsular) effect - by taxon (migrant birds
especially)

         4.  Spatial concurrence of diversity "hotspots" among taxa

         B. Fine scale patterns

            1.  Microhabitat and zonation influences on species richness within
islands

            2.  Genetic differentiation of small mammals (and plants?) on
islands

IV.     Causes of impoverishment/ change

           1. Natural causes - e.g. sea level rise, predator changes, SAV
disappearance


            2.  Human causes - Disturbances from occupation, invasive species,
harvest

V.        Information needs

             - Other taxa (invertebrates, herps, parasites of both plants and
animals)

              - Genetic analysis to determine gene flow, pop. differentiation

               - Coupling of terrestrial with aquatic diversity - independence?

               - Interrelationships among diversity, productivity, nutrient
levels, organic matter
                 (LTER core areas) for the entire barrier system (do-able?  This
is a GOAL however, of
                 all LTER sites

R. Michael Erwin
804-924-3207/ fax 804-982-2137
email: rme5g@virginia.edu
OR: R_Michael_Erwin@NBS.GOV
Dept. of Envir. Sciences
Clark Hall
Univ. of Virginia
Charlottesville VA 22903

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