Of lemmings and snowshoe hares: the ecology of northern Canada.

  title={Of lemmings and snowshoe hares: the ecology of northern Canada.},
  author={Charles J Krebs},
  journal={Proceedings. Biological sciences},
  volume={278 1705},
Two population oscillations dominate terrestrial community dynamics in northern Canada. In the boreal forest, the snowshoe hare (Lepus americanus) fluctuates in cycles with an 8-10 year periodicity and in tundra regions lemmings typically fluctuate in cycles with a 3-4 year periodicity. I review 60 years of research that has uncovered many of the causes of these population cycles, outline areas of controversy that remain and suggest key questions to address. Lemmings are keystone herbivores in… CONTINUE READING
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