L. Oksanen

Publications61
h-index24
Citations3,712
Highly Influential Citations210
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  • Publications
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Exploitation Ecosystems in Gradients of Primary Productivity
Based on the assumption that each trophic level acts as a single exploitative population, a model relating the trophic structure of ecosystems to their potential primary productivity is developed.… Expand
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Herbivores inhibit climate‐driven shrub expansion on the tundra
Recent Pan-Arctic shrub expansion has been interpreted as a response to a warmer climate. However, herbivores can also influence the abundance of shrubs in arctic ecosystems. We addressed these alt… Expand
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Effects of summer grazing by reindeer on composition of vegetation, productivity and nitrogen cycling
In this study, we investigated the effect of reindeer grazing on tundra heath vegetation in northern Norway. Fences, erected 30 yr ago, allowed us to compare winter grazed, lightly summer grazed and… Expand
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Effects of altitude and topography on species richness of vascular plants, bryophytes and lichens in alpine communities
Abstract Question: What is the relationship between species richness of vascular plants, bryophytes and macrolichens, and two important gradients in the alpine environment, altitude and local… Expand
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Lemming Grazing on Snowbed Vegetation during a Population Peak, Northern Norway
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Timberline patterns in northernmost Fennoscandia. Relative importance of climate and grazing
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Plant strategies along mountain vegetation gradients: a test of two theories
We test the predictions of two theories on plant strategies along vegetation gradients of a North Scandinavian mountain area, from herb-rich birch forests at 250 m. a.s.l. to the summit at 1530 m.… Expand
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Trophic Exploitation and Arctic Phytomass Patterns
  • L. Oksanen
  • Biology
  • The American Naturalist
  • 1 July 1983
Aboveground phytomasses of tundra communities and changes in moss phytomass after a lemming peak were reviewed to test the prediction of the hypothesis of exploitation ecosystems that herbivory… Expand
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Long-Term Exclusion of Folivorous Mammals in Two Arctic-Alpine Plant Communities: A Test of the Hypothesis of Exploitation Ecosystems
During 1987-1994 we monitored changes in vegetation in exposures and permanent open plots established in two contrasting habitats: a productive hemiarctie tall herb meadow and a less productive… Expand
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Long-term microtine dynamics in north Fennoscandian tundra: the vole cycle and the lemming chaos
Densities of microtine rodents in two habitat complexes in the tundra of Finnmarks-vidda, Norwegian Lapland, were studied during 1977-89 by means of snap trapping (Small Quadrat Method) Predator… Expand
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