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Science  22 Jan 1999:
Vol. 283, Issue 5401, pp. 455e
DOI: 10.1126/science.283.5401.455e

What explains a rainforest's tremendous diversity of plants? A study in Panama discussed by Tilman in the Enhanced Perspective on p. 495 points to the patchy distribution of species, which allows weaker plants to flourish in the absence of competitors. The online Perspective offers links to Web-based ecology courses, sites on tropical rainforests, overviews of biodiversity, and more.

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