Long-term responses in arctic ungulate dynamics to changes in climatic and trophic processes

M. C. Forchhammer, Eric S Post, N. C. Stenseth, D. M. Boertmann

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Following predictions from climatic general circulation models, the effects of perturbations in global climate are expected to be most pronounced in the Northern Hemisphere. Elaborating on a recently developed plant-herbivore-climate model, we explore statistically how different winter climate regimes and density-dependent processes during the past century have affected population dynamics of two arctic ungulate species. Our analyses were performed on the dynamics of six muskox and six caribou populations. In muskoxen, variation in winter climate, mediated through the North Atlantic Oscillation (NAO), explained up to 24% of the variation in interannual abundance, whereas in caribou up to 16% was explained by the NAO. Muskoxen responded negatively following warm and snowy winters, whereas caribou responded negatively to dry winters. Direct and delayed density dependence was recorded in most populations and explained up to 32% and 90% of variations in abundance of muskoxen and caribou, respectively.

Original languageEnglish (US)
Pages (from-to)113-120
Number of pages8
JournalPopulation Ecology
Volume44
Issue number2
DOIs
StatePublished - Aug 1 2002

Fingerprint

Ovibos moschatus
Rangifer tarandus
ungulate
ungulates
Arctic region
climate change
winter
climate models
North Atlantic Oscillation
climate
General Circulation Models
density dependence
general circulation model
global climate
herbivore
climate modeling
Northern Hemisphere
population dynamics
herbivores
perturbation

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

Cite this

Forchhammer, M. C. ; Post, Eric S ; Stenseth, N. C. ; Boertmann, D. M. / Long-term responses in arctic ungulate dynamics to changes in climatic and trophic processes. In: Population Ecology. 2002 ; Vol. 44, No. 2. pp. 113-120.
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Long-term responses in arctic ungulate dynamics to changes in climatic and trophic processes. / Forchhammer, M. C.; Post, Eric S; Stenseth, N. C.; Boertmann, D. M.

In: Population Ecology, Vol. 44, No. 2, 01.08.2002, p. 113-120.

Research output: Contribution to journalArticle

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