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Science 19 November 1999:
Vol. 286. no. 5444, pp. 1577 - 1579
DOI: 10.1126/science.286.5444.1577
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Reports
Species Diversity and Invasion Resistance in a Marine Ecosystem
John J. Stachowicz,
1*
Robert B. Whitlatch,
1
Richard W. Osman
2
Theory predicts that systems that are more diverse
should be more resistant to exotic species, but experimental tests are needed to verify this. In experimental communities of sessile marine
invertebrates, increased species richness significantly decreased
invasion success, apparently because species-rich communities more
completely and efficiently used available space, the limiting resource
in this system. Declining biodiversity thus facilitates invasion in
this system, potentially accelerating the loss of biodiversity and the
homogenization of the world's biota.
1 Department of Marine Sciences, University of
Connecticut, 1084 Shennecossett Road, Groton, CT 06340, USA.
2 Academy of Natural Sciences, Estuarine Research
Center, St. Leonard, MD 20685, USA.
*
To whom correspondence should be addressed. E-mail:
jstach{at}uconnvm.uconn.edu
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