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Science 18 December 1998:
Vol. 282. no. 5397, p. 2149
DOI: 10.1126/science.282.5397.2149h
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This Week in Science

Population cycles are a major theme in ecology, but definitive identification of their causes remains problematic. Now Hudson et al. (p. 2256) describe the interaction behind one celebrated cycle, namely, the regular crashes in numbers of red grouse in the north of England. Experimental reduction in the burden of a nematode worm in the birds can repeatedly prevent the decline in numbers, demonstrating that a single trophic interaction can induce regular fluctuations.




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