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Bird communities of the Arctic shrub tundra of Yamal: habitat specialists and generalists
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
The ratio of habitat generalists to specialists in birds has been suggested as a good indicator of ecosystem changes due to e.g. climate change and other anthropogenic perturbations. Most studies focusing on this functional component of biodiversity originate, however, from temperate regions. The Eurasian Arctic tundra is currently experiencing an unprecedented combination of climate change, change ...
Assessing the causes of breeding failure among the rough-legged buzzard (Buteo lagopus) during the nestling period
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
When food becomes scarce, the youngest nestlings in facultatively siblicidal raptor species typically die and such events are usually attributed to siblicide. Here we present results from an investigation in the Arctic tundra, in which rough-legged buzzard (Buteo lagopus) breeding success was monitored with regular visits to nests and time-lapse cameras that continuously recorded the activity of ...
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 ...
The importance of willow thickets for ptarmigan and hares in shrub tundra : the more the better?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
Sources of variation in small rodent trophic niche: New insights from DNA metabarcoding and stable isotope analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-05-15)
Parasitoids indicate major climate-induced shifts in arctic communities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-05)
Climatic impacts are especially pronounced in the Arctic, which as a region is warming
twice as fast as the rest of the globe. Here, we investigate how mean climatic conditions and rates of climatic change impact parasitoid insect communities in 16 localities
across the Arctic. We focus on parasitoids in a widespread habitat, Dryas heathlands,
and describe parasitoid community composition in terms ...