The persistence of host-parasitoid associations in patchy environments I. A general criterion

M. P. Hassell, R. M. May, S. W. Pacala, P. L. Chesson

Research output: Contribution to journalArticle

180 Scopus citations

Abstract

For host-parasitoid interactions in a heterogeneous environment and with discrete generations, the dynamic effects of any patterns of distribution of searching parasitoids can be assessed within a common, simple framework. The populations are regulated if the distribution of searching parasitoids is sufficiently heterogeneous. The square of the coefficient of variation (CV2) of the searching parasitoids per host must exceed unity. CV2 may be partitioned into a density-dependent component caused by the response of parasitoids to host density per patch and a density-independent component. Population regulation is enhanced as much as density-independent as by density-dependent heterogeneity. -from Authors

Original languageEnglish (US)
Pages (from-to)568-583
Number of pages16
JournalAmerican Naturalist
Volume138
Issue number3
DOIs
StatePublished - Jan 1 1991
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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