Technical Comments

Comment on "Asymmetric Coevolutionary Networks Facilitate Biodiversity Maintenance"

Science  29 Sep 2006:
Vol. 313, Issue 5795, pp. 1887
DOI: 10.1126/science.1129547

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Abstract

Bascompte et al. (Reports, 21 April 2006, p. 431) used network asymmetries to explain mathematical conditions necessary for stability in historic models of mutualism. The Lotka-Volterra equations they used artificially created conditions in which some factor, such as asymmetric interaction strengths, is necessary for community coexistence. We show that a more realistic model incorporating nonlinear functional responses requires no such condition and is consistent with their data.

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