Blar i Divisjon for bioteknologi og plantehelse på forfatter "Skarpaas, Olav"
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Generic Ecological Impact Assessment of Alien Species (GEIAA): the third generation of assessments in Norway
Sandvik, Hanno; Hilmo, Olga; Finstad, Anders Gravbrøt; Hegre, Hanne; Moen, Toril Loennechen; Rafoss, Trond; Skarpaas, Olav; Elven, Reidar; Sandmark, Helge; Gederaas, Lisbeth (Journal article; Peer reviewed, 2019-06-25)The Generic Ecological Impact Assessment of Alien Species (GEIAA) is described. It comprises a set of criteria and an assessment procedure. The set of criteria consists of three criteria that quantify invasion potential, ... -
Trees Wanted—Dead or Alive! Host Selection and Population Dynamics in Tree-Killing Bark Beetles
Kausrud, Kyrre Linné; Grégoire, Jean-Claude; Skarpaas, Olav; Erbilgin, Nadir; Gilbert, Marius; Økland, Bjørn; Stenseth, Nils Christian (Journal article; Peer reviewed, 2011-05-25)Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may ...