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Science 25 August 2000:
Vol. 289. no. 5483, p. 1283
DOI: 10.1126/science.289.5483.1283

News Focus

ECOLOGY:
When Do Many Species Matter?

Jocelyn Kaiser

Ecologists agree that experimental plots of grasses are sometimes more productive when they harbor more species. But some disagree passionately about whether it matters--in other words, whether this proves that biodiversity is critical to ecosystem health (see main text).

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