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Cristin-resultat-ID:
228788
Sist endret:
12. september 2018, 09:12
Resultat
Vitenskapelig foredrag
2007
Modelling resource utilisation of temporally irregular and spatially autocorrelated GPS data of red deer
Barbara Zimmermann
Hege Gundersen
Arne Hjeltnes
Jostein Sageie
og
Olav Rosef
Presentasjon
Presentasjon
Navn på arrangementet: The 18th congress of the International Union of Game Biologists IUGB
Sted: Uppsala
Dato fra:
13. august 2007
Dato til:
18. august 2007
Arrangør:
Arrangørnavn: International Union of Game Biologists (IUGB)
Om resultatet
Om resultatet
Vitenskapelig foredrag
Publiseringsår: 2007
Klassifisering
Klassifisering
Vitenskapsdisipliner
Økologi
Beskrivelse
Beskrivelse
Engelsk
Tittel
Modelling resource utilisation of temporally irregular and spatially autocorrelated GPS data of red deer
Sammendrag
The application of resource selection functions (RSF) for large datasets of GPS-positions is limited by the relatively high proportion of used grid cells compared to the available area. Resource utilisation functions (RUF) assume that the degree of use of areas without relocations follows a kernel density distribution of the relocations (Millspaugh et al. 2006). This assumption though is often violated by the fact that most relocation techniques are discrete in time and therefore display only a narrow time window of resource use. We have modified the RUF method by relating kernel density values to available resources at the site of relocations only. Contrary to grid cells, relocations are not systematically distributed in space and often not systematically sampled in time, and we accounted for temporal and spatial autocorrelation by applying the time kernel method (Katajisto and Moilanen 2006) and subsampling relocations with a minimum nearest neighbour distance defined by the relocation error and the map pixel size of the resources. We used generalized linear mixed models (GLMM) with a spatial covariance matrix and different combinations of random intercept and coefficients (Gillies et al. 2006) to describe resource use. Different resource variables were derived from vegetation maps based on Landsat images and from a terrain model.
Vis
fullstendig beskrivelse
Bidragsytere
Bidragsytere
Barbara Zimmermann
Forfatter
ved Institutt for skog- og utmarksfag ved Høgskolen i Innlandet
Hege Gundersen
Forfatter
ved Center for Ecological and Evolutionary Synthesis (gml. CEES) ved Universitetet i Oslo
Arne Hjeltnes
Forfatter
ved Universitetet i Sørøst-Norge
Jostein Sageie
Forfatter
ved Universitetet i Sørøst-Norge
Olav Rosef
Forfatter
ved Universitetet i Sørøst-Norge
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