Abstract

Hazel grouse Bonasa bonasin were censused dong transects every autumn for 30 yr in a source-dominated and a sink-dominated landscape in a pristine taiga forest near the Ural Mountains of European Russia. The source-dominated landscape contained somewhat less than 4.7 times the proportion of source habitat than the sink-dominated landscape. Population density was twice as high in the source-dominated landscape (P = 0.002), but variability was not different (P > 0.10). In the source-dominated landscape there was a residual carry-over effect from par to year, as indicated by a significant autocorrelation in density with a l-yr time lag. However, in the sink-dominated landscape there was no significant autocorrelation with a I-yr time lag. Population trends were stationary over the 30-yr period in both landscapes. Power analyses suggested that autocorrelation with I-yr time lag, i.e. correlation between density in year x and x+l, was better to distinguish source from sink habitats than differences in density or variability.

Published in

Oikos
1994, Volume: 71, number: 3, pages: 375-380
Publisher: MUNKSGAARD INT PUBL LTD

SLU Authors

• Angelstam, Per

  • Department of Wildlife Ecology, Swedish University of Agricultural Sciences
    

• Andren, Henrik

  • Department of Wildlife Ecology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Ecology


Publication identifier

DOI: https://doi.org/10.2307/3545825

Permanent link to this page (URI)

https://res.slu.se/id/publ/53426