English
norskBlar i forfatter "Stien, Audun"
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The neglected season: Warmer autumns counteract harsher winters and promote population growth in Arctic reindeer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-24)Arctic ungulates are experiencing the most rapid climate warming on Earth. While concerns have been raised that more frequent icing events may cause die‐offs, and earlier springs may generate a trophic mismatch in phenology, the effects of warming autumns have been largely neglected. We used 25 years of individual‐based data from a growing population of wild Svalbard reindeer, to test how warmer ... -
Plastic reproductive allocation as a buffer against environmental stochasticity : linking life history and population dynamics to climate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)Empirical work suggest that long-lived organisms have adopted risk sensitive reproductive strategies where individuals trade the amount of resources spent on reproduction versus survival according to expected future environmental conditions. Earlier studies also suggest that climate affects population dynamics both directly by affecting population vital rates and indirectly through long-term changes ... -
Rangifer management controls a climate-sensitive tundra state transition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-04)Rangifer (caribou/reindeer) management has been suggested to mitigate the temperature- driven transition of Arctic tundra into a shrubland state, yet how this happens is uncertain. Here we study this much focused ecosystem state transition in riparian areas, where palatable willows (Salix) are dominant tall shrubs and highly responsive to climate change. For the state transition to take place, ... -
The role of predation and food limitation on claims for compensation, reindeer demography and population dynamics
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-10)1.A major challenge in biodiversity conservation is to facilitate viable populations of large apex predators in ecosystems where they were recently driven to ecological extinction due to resource conflict with humans. 2. Monetary compensation for losses of livestock due to predation is currently a key instrument to encourage human–carnivore coexistence. However, a lack of quantitative estimates ... -
Stress responses to repeated captures in a wild ungulate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-29)While capture-mark-recapture studies provide essential individual-level data in ecology, repeated captures and handling may impact animal welfare and cause scientific bias. Evaluating the consequences of invasive methodologies should be an integral part of any study involving capture of live animals. We investigated short- and long-term stress responses to repeated captures within a winter on the ... -
Svalbard reindeer winter diets: Long-term dietary shifts to graminoids in response to a changing climate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-07)Arctic ecosystems are changing dramatically with warmer and wetter conditions resulting in complex interactions between herbivores and their forage. We investigated how Svalbard reindeer (Rangifer tarandus platyrhynchus) modify their late winter diets in response to long-term trends and interannual variation in forage availability and accessibility. By reconstructing their diets and foraging ... -
Unfounded claims about productivity beyond density for reindeer pastoralism systems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-22)We point out problems with the article Productivity beyond density: A critique of management models for reindeer pastoralism in Norway by Marin and co-workers published in Pastoralism in 2020. In our opinion, there are several misleading claims about the governance of the reindeer pastoralist system in Norway, the Røros model for herd management and density dependence in reindeer herds in their ...
