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2005 | 53 | 4 |

Tytuł artykułu

Interactions driving the population cycle of Arctic small rodents

Autorzy

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The cyclicity of Arctic populations of small rodents is a subject with a long history and a large literature (Batzli,1992) in which the question ‘What drives the cycle?’ has received many answers, among them that the source of the cycle is either rodent interaction with food or the interaction with predators or both. Another question concerns the confinement of the cycle to Arctic conditions. The paper by Gårding (2000) presented a simple mathematical model of the combined predator-prey-food interaction based on a general eater-food interaction in which cycle length is an explicit decreasing function of the average birth rate of eaters. In the combined interaction, the cycle length is the same function of the sum of the average birth rates of predators and prey. Numerical fits of these models make it possible to answer the questions above. The results are that the short 3–5 year cycles of the Arctic rodents: lemming (Lemmus lemmus) and vole (Microtus agrestis) are mainly driven by interaction with food while the ten year cycle of the Canadian snowshoe hare (Lepus americanus), is driven by interaction with its predator – lynx. Rodents in the Arctic live and breed in burrows and experience predation pressure when surfacing. This explains their interaction with food. The greater variety and easier availability of food in a temperate climate accounts for a missing rodent interaction with food. The paper starts with a presentation of the eater-food interaction model itself, its simple but unfamiliar mathematics and its points of credibility. At the end of the paper some current hypotheses about the nature of the rodent cycle are seen in the light of the model used here.

Wydawca

-

Rocznik

Tom

53

Numer

4

Opis fizyczny

p.579-584,fig.,ref.

Twórcy

autor
  • Lund University, Box 118, 22 100 Lund, Sweden

Bibliografia

  • Batzli G. O. 1992 – Dynamics of small mammal populations: an overview. (In: Wildlife 2001: populations, Eds: Mc Cullough D.R. and Barnet R.H.) – Elsevier. London 831–850.
  • Brand C. J., Keith L.B. 1979 – Lynx demography during a snowshoe hare decline in Alberta – The journal of wildlife management 43: 827–849.
  • Erlinge S. 1987 – Predation and non-cyclicity in a microtine population in southern Sweden – Oikos 50: 347–352.
  • Gårding L. 2000 – A simple model for the interplay of rodents, predators and rodent food – Journal of Theoretical Biology 206.1: 73–80.
  • Krebs C. J. 1994 – Population cycles revisited – J. of Mammalogy 77: 8–24.
  • Krebs C. J., Stenseth N. C. 1995 – Impact of food and predation on the snowshoe hare cycle – Science 269, 1112–1115.
  • Krebs C. J., Boonstra R., Boutin S., Sinclair A. R. E. 2001 – What drives the 10-year cycle of snowshoe hares? – Bioscience 51.1: 25–34.
  • Seldal T., Andersen K. J., Högstedt G. 1994 – Grazing-induced proteinase inhibitors: a possible cause for lemming population cycles – Oikos 70: 3–11.
  • Stenseth N. C. 1995 – Snowshoe hare populations: Squeezed from below and above – Science 269: 1061–1062.
  • Stenseth N. C. 1999 – Population cycles in voles and lemmings: density dependence and phase dependence in a stochastic world – Oikos 87, 427–86.
  • Turchin P., Oksanen L., Ekerholm P., Henttonn H. 2000 – Are lemmings prey or predators? – Nature 405,1.
  • Turchin P., Hanski I. 1997 – An empirically based model for latitudinal gradient in vole population dynamics – The American Naturalist 149: 841–874.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-article-df0938e1-3afb-42d8-aef3-6f233dc7083a
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