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Science 19 November 1999:
Vol. 286. no. 5444, p. 1441
DOI: 10.1126/science.286.5444.1441m
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This Week in Science

Introductions of exotic and invasive species are among the leading causes of biodiversity decline, but what makes an ecosystem susceptible to invasion? Stachowicz et al. (p. 1577) investigated this question experimentally by manipulating species richness in rocky intertidal communities and monitoring subsequent invasion by an introduced species. Increased species diversity enhanced the community's resistance to invasion. This result implies that loss of diversity and invasion might reinforce each other by a negative feedback cycle, thereby accelerating extinction rates among the world's threatened biota.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)