Journal article
Phase- and density-dependent population dynamics in Norwegian lemmings: interaction between deterministic and stochastic processes
Proceedings of the Royal Society. B, Biological sciences, Vol.265(1409), pp.1957-1968
10/22/1998
DOI: 10.1098/rspb.1998.0526
PMCID: PMC1689487
PMID: 9821362
Abstract
We analysed two 26-year long (1970 to 1995) time-series on annual population growth rates of Norwegian lemmings (Lemmus lemmus) from Finse, south Norway, using a threshold autoregressive (TAR) approach. We demonstrate that the population dynamics is both phase- and density-dependent. The phase-dependence accounts for the observed nonlinearity. We used the deduced stochastic model structure as a basis for evaluating the dynamic properties of this system. The dynamics is characterized either by limit cycles or chaos (the latter with a strong semi-periodic component). Stochasticity is seen to play an important role in the determination of the periodicity. The ecological implications of these statistical and mathematical results are discussed.
Details
- Title: Subtitle
- Phase- and density-dependent population dynamics in Norwegian lemmings: interaction between deterministic and stochastic processes
- Creators
- N. C Stenseth - Norwegian Academy of Science and LettersK Chan - University of IowaE Framstad - Norwegian Institute for Nature ResearchH Tong - University of Kent
- Resource Type
- Journal article
- Publication Details
- Proceedings of the Royal Society. B, Biological sciences, Vol.265(1409), pp.1957-1968
- DOI
- 10.1098/rspb.1998.0526
- PMID
- 9821362
- PMCID
- PMC1689487
- NLM abbreviation
- Proc Biol Sci
- ISSN
- 0962-8452
- eISSN
- 1471-2954
- Publisher
- The Royal Society
- Language
- English
- Date published
- 10/22/1998
- Academic Unit
- Statistics and Actuarial Science; Radiology
- Record Identifier
- 9984257623102771
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