T
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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Journal ArticleDOI
Trophic Downgrading of Planet Earth
James A. Estes,John Terborgh,Justin S. Brashares,Mary E. Power,Joel Berger,William J. Bond,Stephen R. Carpenter,Timothy E. Essington,Robert D. Holt,Jeremy B. C. Jackson,Robert J. Marquis,Lauri Oksanen,Tarja Oksanen,Robert T. Paine,Ellen K. Pikitch,William J. Ripple,Stuart A. Sandin,Marten Scheffer,Thomas W. Schoener,Jonathan B. Shurin,Anthony R. E. Sinclair,Michael E. Soulé,Risto Virtanen,David A. Wardle +23 more
TL;DR: This empirical work supports long-standing theory about the role of top-down forcing in ecosystems but also highlights the unanticipated impacts of trophic cascades on processes as diverse as the dynamics of disease, wildfire, carbon sequestration, invasive species, and biogeochemical cycles.
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The Logic and Realism of the Hypothesis of Exploitation Ecosystems.
Lauri Oksanen,Tarja Oksanen +1 more
TL;DR: EEH is corroborated by biomass patterns, by patterns in the structure and dynamics of carnivore, folivore, and plant communities, and by experimental results, but critical empirical evidence for or against the capacity of folivorous insects to regulate plant biomass has not yet been obtained.
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How much do weasels shape microtine cycles in the northern Fennoscandian taiga
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Surplus Killing in the Hunting Strategy of Small Predators
TL;DR: The numerical predator-to-prey ratio advocated by Pearson (1966, 1971) might not reflect the intensity of predation, and estimates ofpredation based on identifiable prey remains found from predator scats could be far too low.
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Population fluctuations of voles in North Fennoscandian tundra : contrasting dynamics in adjacent areas with different habitat composition
TL;DR: The observed scenario is consistent with the hypothesis that vole cycles represent a mustelid-microtine limit cycle, because cycles created by this mechanism should disappear when the productive habitats, capable of supporting resident predators, become fragmented and embedded in a vast unsuitable area.