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Science 4 July 2003:
Vol. 301. no. 5629, pp. 58 - 59
DOI: 10.1126/science.1087384
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Perspectives

Also see the archival list of Science's Compass: Enhanced Perspectives

EVOLUTION:
Enhanced: Evolutionary Danger for Rainforest Species

Derek Roff

Numerous genetic analyses show that virtually all traits are accompanied by genetic variance. In a Perspective, Roff explains surprising new findings that reveal a lack of genetic variation in an ecologically important trait (desiccation resistance) in a population of rainforest fruit flies (Hoffmann et al.). Roff discusses the implications of this study for the adaptation of species to global warming.

The author is in the Department of Biology, University of California, Riverside, CA 92521, USA. E-mail: derek.roff{at}ucr.edu

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