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Tarja Oksanen

Researcher at University of Turku

Publications -  29
Citations -  4574

Tarja Oksanen is an academic researcher from University of Turku. The author has contributed to research in topics: Tundra & Population. The author has an hindex of 17, co-authored 28 publications receiving 4036 citations. Previous affiliations of Tarja Oksanen include University of Tromsø.

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The impact of short‐term predator removal on vole dynamics in an arctic‐alpine landscape

TL;DR: Vole dynamics in the short-term exclosure were compared to dynamics in five reference areas with similar habitat conditions and the strongest response was displayed by field voles, hypothesized to be the pivotal prey species of weasels, especially by females and young individuals.
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Long-Term Experiments Reveal Strong Interactions Between Lemmings and Plants in the Fennoscandian Highland Tundra

TL;DR: It is revealed that a substantial increase in community biomass which occurs only when plant species capable of accumulating biomass are present, and palatability is a poor predictor of long-term responses of plants to excluding herbivores.
Journal Article

Impact of marine-subsidized predators on lemming-plant oscillations

TL;DR: On grassland/meadow tundra, increasing intensity of summer predation reduces the amplitude and period of lemming and plant oscillations and increases the minimum and average density of lemmings and depletable plants, so the predicted predator–lemming relationship is mutualistic rather than exploitative.
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Coping with fast climate change in northern ecosystems: mechanisms underlying the population-level response of a specialist avian predator

TL;DR: The results highlighted that, in northern ecosystems, ongoing climate change has the potential to impact specialist predator species through two mechanistic linkages, which may in the long-run, threaten the viability of their populations, and lead to potential severe cascading trophic effects at the ecosystem level.
Journal Article

Plant defences to no avail? Responses of plants of varying edibility to food web manipulations in a low arctic scrubland

TL;DR: This paper presents a new approach to estimating the biomass requirements of terrestria by exploiting the copious abundance of plant biomass in arid regions of the world.