Angelstam, Per
- Institutionen för viltekologi, Sveriges lantbruksuniversitet
Sammanfattning
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.
Publicerad i
Oikos
1994, volym: 71, nummer: 3, sidor: 375-380
Utgivare: MUNKSGAARD INT PUBL LTD
SLU författare
Andren, Henrik
- Institutionen för viltekologi, Sveriges lantbruksuniversitet
- Institutionen för viltekologi, Sveriges lantbruksuniversitet
UKÄ forskningsämne
Ekologi
Publikationens identifierare
- DOI: https://doi.org/10.2307/3545825
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/53426