A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Impact of marine-subsidized predators on lemming-plant oscillations
Tekijät: Oksanen T, Oksanen L, Söderbacka G, Hoset KS, Ruffino L, Tuomi M
Kustantaja: EVOLUTIONARY ECOLOGY LTD
Kustannuspaikka: UNIV ARIZONA, 321 BIOSCIENCES WEST, TUCSON, AZ 85721 USA
Julkaisuvuosi: 2013
Journal: Evolutionary Ecology Research
Tietokannassa oleva lehden nimi: EVOLUTIONARY ECOLOGY RESEARCH
Lehden akronyymi: EVOL ECOL RES
Numero sarjassa: 1
Vuosikerta: 15
Numero: 1
Aloitussivu: 1
Lopetussivu: 24
Sivujen määrä: 24
ISSN: 1522-0613
Tiivistelmä
Predictions: 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. The predicted predator-lemming relationship is thus mutualistic rather than exploitative. In heath-type tundra, the predicted positive impact of summer predation on lemmings is even stronger because, without intense summer predation, the predicted oscillations are violent enough to lead to local extinctions. In tundra areas with such dynamics, natural selection should favour lemmings that react to high population densities by emigrating.
Predictions: 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. The predicted predator-lemming relationship is thus mutualistic rather than exploitative. In heath-type tundra, the predicted positive impact of summer predation on lemmings is even stronger because, without intense summer predation, the predicted oscillations are violent enough to lead to local extinctions. In tundra areas with such dynamics, natural selection should favour lemmings that react to high population densities by emigrating.
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