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Intrapopulation diversity in isotopic niche over landscapes : Spatial patterns inform conservation of bear–salmon systems [Ecosphere]

Keywords : bears, dietary niche, geographic information systems, isoscapes, kernel-weighted regression, Oncorhynchus, predator–prey systems, salmon, stable isotope analysis, ursus

par Frédéric Magné - publié le

Intrapopulation variability in resource acquisition (i.e., niche variation) influences population dynamics, with important implications for conservation planning. Spatial analyses of niche variation within and among populations can provide relevant information about ecological associations and their subsequent management. We used stable isotope analysis and kernel-weighted regression to examine spatial patterns in a keystone consumer–resource interaction : salmon (Oncorhynchus spp.) consumption by grizzly and black bears (Ursus arctos horribilis, n = 886 ; and Ursus americanus, n = 557) from 1995 to 2014 in British Columbia (BC), Canada.(...)

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