Territorial Dynamics in an Isolated White-Backed Woodpecker (Oendrocopos leucotos) Population ALLAN CARLSON 1 GUSTAF AULI~N 2 Department of Wildlife Ecology Swedish University of Agricultural Sciences Box 7002 S-750 07 Uppsala Sweden The White-Backed Woodpecker now occurs only in Introduction very low numbers in certain areas of Sweden, occupying The current fragmentation of natural habitats inevitably patches of mature deciduous forest. The habitat re- leads to many species becoming split into disjunct local quired by the White-Backed Woodpecker---old-growth populations isolated in patches of habitat suitable for the deciduous forest and late successional stages of decid- species. Levins (1969, 1970) introduced the metapop- uous forest such as arise after forest fires or on aban- ulation concept as a tool for the analysis of the dynamics doned farmland (Aul~n 1988), probably always has of species with complex spatial population structure. been patchily distributed in the taiga forest. Therefore, His approach was to ignore the dynamic within local this species has always had a scattered distribution in populations but to focus on the determinants of persis- the taiga forest, and as a result it can be expected to tence of the regional population. Several important con- exhibit features predisposing it to the shifting
Conservation Biology – Wiley
Published: Sep 1, 1992
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