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Comment on "A Keystone Mutualism Drives Pattern in a Power Function"

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Science  22 Sep 2006:
Vol. 313, Issue 5794, pp. 1739
DOI: 10.1126/science.1129115

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Vandermeer and Perfecto (Reports, 17 February 2006, p. 1000) reported a general power law pattern in the distribution of a common agricultural pest. However, there is an exact analytical solution for the expected cluster distribution under the proposed null model of density-independent growth in a patchy landscape. Reanalysis of the data shows that the system is not in a critical state but confirms the importance of a mutualism.

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