Bakgrunn og aktiviteter
Arbeidssted
Centre for Biodiversity Dynamics (CBD) http://www.ntnu.edu/cbd
Institutt for biologi, NV-fakultetet, NTNU
Interessefelt
Populasjonsøkologi, populasjonsdynamikk, bestandsdynamikk, samfunnsøkologi, samfunnsdynamikk, adferdsøkologi, populasjonsgenetikk, ancient DNA, trofiske interaksjoner (f.eks. plante-herbivor-interaksjoner), klimaendringer, klimaeffekter, Arktis, Svalbard, svalbardrein, hvitkinngås, fjellrev, demografisk modellering.
Forskning
Leder for forskningsgruppa Dynamics of Arctic Ecosystems, som er en del av Community Dynamics ved CBD. Prosjektleder for "Community dynamics in a rapidly warming high Arctic: trophic synchrony in time and space (INSYNC)", finansiert av Norges forskningsråd (FRIPRO) i perioden 2018-2021. Målet med prosjektet er å undersøke hvordan klimaendringer påvirker romlig og temporær samfunnsdynamikk - på tvers av arter og trofiske nivå - på svalbardtundraen. Prosjektpartnere er Univ. Groningen, Univ. Aberdeen, Univ. Iceland, CNRS Montpellier, Meteorologisk institutt, Universitetssenteret på Svalbard (UNIS). Følg prosjektet på twitter, youtube og ResearchGate.
Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
Tidsskriftspublikasjoner
- (2019) Spatiotemporal patterns of rain-on-snow and basal ice in high Arctic Svalbard: detection of a climate-cryosphere regime shift. Environmental Research Letters. vol. 14.
- (2019) More frequent extreme climate events stabilize reindeer population dynamics. Nature Communications. vol. 10 (1).
- (2019) Reindeer turning maritime: Ice-locked tundra triggers changes in dietary niche utilization. Ecosphere. vol. 10 (4).
- (2019) Density‐dependent population dynamics of a high Arctic capital breeder, the barnacle goose. Journal of Animal Ecology.
- (2018) A new NDVI measure that overcomes data sparsity in cloud-covered regions predicts annual variation in ground-based estimates of high arctic plant productivity. Environmental Research Letters. vol. 13.
- (2018) Annual ring growth of a widespread high arctic shrub reflects past fluctuations in community‐level plant biomass. Journal of Ecology. vol. 107 (1).
- (2017) Contrasting effects of summer and winter warming on body mass explain population dynamics in a food-limited Arctic herbivore. Global Change Biology. vol. 23 (4).
- (2017) Cratering behaviour and faecal C:N ratio in relation to seasonal snow-pack characteristics in a High-Arctic ungulate. Polar Research. vol. 36 (1).
- (2017) Ungulate population monitoring in an open tundra landscape: distance sampling versus total counts. Wildlife Biology. vol. 2017.
- (2017) Climate and density dependence cause changes in adult sex ratio in a large Arctic herbivore. Ecosphere. vol. 8 (2).
- (2016) Demographic buffering of life histories? Implications of the choice of measurement scale. Ecology. vol. 97 (1).
- (2016) Behavioral buffering of extreme weather events in a high-Arctic herbivore. Ecosphere. vol. 7 (6).
- (2016) Experimental icing affects growth, mortality, and flowering in a high Arctic dwarf shrub. Ecology and Evolution. vol. 6 (7).
- (2016) Changes in greening in the high Arctic: Insights from a 30 year AVHRR max NDVI dataset for Svalbard. Environmental Research Letters. vol. 11 (10).
- (2015) An integrated population model for a long-lived ungulate: more efficient data use with Bayesian methods. Oikos. vol. 124 (6).
- (2014) Warmer and wetter winters: characteristics and implications of an extreme weather event in the High Arctic. Environmental Research Letters. vol. 9 (11).
- (2014) Habituation to humans in a predator-free wild ungulate. Polar Biology. vol. 38 (2).
- (2014) Svalbardreinen - økologi, parasitter og sjukdommer. Norsk Veterinærtidsskrift. vol. 126 (2).
- (2013) Climate Events Synchronize the Dynamics of a Resident Vertebrate Community in the High Arctic. Science. vol. 339 (6117).
- (2012) Kelp and seaweed feeding by High-Arctic wild reindeer under extreme winter conditions. Polar Research. vol. 31.