NDLI: Spatial dynamics of Norwegian tetraonid populations

Content Provider	Springer Nature Link
Author	Kvasnes, Mikkel A. J. Storaas, Torstein Pedersen, Hans Chr. Bjørk, Svein Nilsen, Erlend B.
Copyright Year	2009
Abstract	Different species in a given site or population of a given species in different sites may fluctuate in synchrony if they are affected similarly by factors such as spatially autocorrelated climate, predation, or by dispersal between populations of one species. We used county wise time series of hunting bag records of four Norwegian tetraonid species covering 24 years to examine patterns of interspecific and intraspecific synchrony. We estimated synchrony at three spatial scales; national, regional (consisting of counties with similar climate), and county level. Ecologically related species with overlapping distributions exhibited strong synchrony across Norway, but there was much variation between the different regions and counties. Regions with a long coastline to both the North Sea and the Norwegian Ocean exhibited an overall stronger synchrony than those consisting of more continental areas. Intraspecific synchrony was generally low across all counties, but stronger synchrony between counties within regions defined by climatic conditions. Synchrony was negatively related to distance between populations in three of four species. Only the synchrony in willow ptarmigan showed a clear negative relationship with distance, while the other species had both strong positive and negative correlations at short distances. Strong interspecific synchrony between some species pairs within regions and weak intraspecific synchrony across counties within regions suggest a stronger synchronizing effect from environmental factors such as weather or predation and less effect from dispersal. Our results suggest that the complete tetraonid community is structured by environmental factors affecting the different species similarly and causes widespread interspecific synchrony. Local factors affecting the population dynamics nevertheless frequently forces neighbouring populations out of phase.
Starting Page	367
Ending Page	374
Page Count	8
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	25
Issue Number	2
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2009-12-05
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Synchrony Growth rates Hunting statistics Willow ptarmigan Rock ptarmigan Capercaillie Black grouse Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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