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Science 8 November 2002:
Vol. 298. no. 5596, p. 1131
DOI: 10.1126/science.298.5596.1131h
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This Week in Science
The use of theoretical ecological models to help prioritize the outcomes of conservation efforts is the subject of two reports (see the Perspective by Côté and Reynolds). Kolar and Lodge (p. 1233) analyzed fish species that have invaded the North American Great Lakes in order to identify characteristics common to successful alien invasion species. They develop a general quantitative approach to species-specific ecological risk assessments and make specific predictions as to the future threat posed by species now native to the Ponto-Caspian basin in Eurasia in terms of their establishment, spread, and impact in the Great Lakes. Lens et al. (p. 1236) examine the relative effects of habitat fragmentation and deterioration on rainforest birds in Kenya. They report correlations between the tendency for species to breed in habitat fragments and those same species' abilities to colonize patches and tolerate degraded patches. They combine these findings with historical museum data to address the effects of declines in habitat quality through measurements of morphological fluctuating asymmetry, a measure of the effects of stress. The authors conclude that the characteristics of individual species can be used to predict habitat occupancy with a high degree of confidence.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
