Animal Dispersal - Small mammals as a model (Paperback, Softcover reprint of the original 1st ed. 1992)

4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies."

General

Imprint:	Springer
Country of origin:	Netherlands
Release date:	December 2012
First published:	1992
Editors:	N.C. Stenseth • W. Z. Lidicker
Dimensions:	235 x 155 x 20mm (L x W x T)
Format:	Paperback
Pages:	365
Edition:	Softcover reprint of the original 1st ed. 1992
ISBN-13:	978-9401050333
Categories:	Books > Science & Mathematics > Biology, life sciences > Life sciences: general issues > Ecological science, the Biosphere Books > Science & Mathematics > Biology, life sciences > Life sciences: general issues > Evolution
LSN:	9401050333
Barcode:	9789401050333

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