Effective size and the persistence of ecosystems.

TitleEffective size and the persistence of ecosystems.
Publication TypeJournal Article
Year of Publication1978
JournalOecologia
Volume35
Issue2
Pagination185-195
ISSN0029-8549
Abstract

Ecosystems distributed in space have an effective size, reflecting both their absolute size (extent) and their fine-scale physical structure (viscosity). In this paper, a general mathematical model of a predator-prey interaction is presented via the phase-plane graphs of Rosenzweig and MacArthur (1963) to show one reason why ecosystems of larger effective size should persist longer than smaller ones: oscillations of population densities tend to be displaced farther from extinction thresholds-even in spatially homogeneous systems. Experimental results obtained by Gause and Luckinbill with protozoa and Huffaker with mites are interpreted in this context.

DOI10.1007/BF00344731
Short TitleOecologia
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