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Intrapopulation variability shaping isotope discrimination and turnover : experimental evidence in Arctic Foxes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Tissue-specific stable isotope signatures can provide insights into the trophic ecology of consumers and their roles in food webs. Two parameters are central for making valid inferences based on stable isotopes, isotopic discrimination (difference in isotopic ratio between consumer and its diet) and turnover time (renewal process of molecules in a given tissue usually measured when half of the tissue ...
Climate Events Synchronize the Dynamics of a Resident Vertebrate Community in the High Arctic
(Peer reviewed; Research report; Forskningsrapport, 2013-01-18)
Recently accumulated evidence has documented a climate impact on the demography and dynamics of single species, yet the impact at the community level is poorly understood. Here, we show that in Svalbard in the high Arctic, extreme weather events synchronize population fluctuations across an entire community of resident vertebrate herbivores and cause lagged correlations with the secondary consumer, ...