Blar i forfatter "Pepi, Adam A."

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    • Can novel pest outbreaks drive ecosystem transitions in northern-boreal birch forest? 

      Vindstad, Ole Petter Laksforsmo; Jepsen, Jane Uhd; Ek, Malin; Pepi, Adam A.; Ims, Rolf Anker (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-04)
      <p>1.The boreal biome exhibits distinct alternative ecosystem states with high and low levels of tree cover. Insect outbreaks facilitated by climate warming could potentially drive transitions from high to low tree cover states. We investigated whether two key premises for such outbreak‐induced transitions – critical thresholds (tipping points) and positive feedbacks that could maintain alternative ...

    • Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest 

      Pepi, Adam A.; Vindstad, Ole Petter Laksforsmo; Ek, Malin; Jepsen, Jane Uhd (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-03)
      1. Population dynamics and interactions that vary over a species’ range are of particular importance in the context of latitudinal clines in biological diversity.Winter moth (Operophtera brumata) and autumnal moth (Epirrita autumnata) are two species of eruptive geometrids that vary widely in outbreak tendency over their range, which generally increases from south to north and with elevation. 2. ...