Blar i forfatter "Herfindal, Ivar"

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    • Bevaringsbiologi - Fjellrev i NINA 2005 

      Landa, Arild Magne; Strand, Olav; Kvaløy, Kirsti; van Dijk, Jiska Joanneke; Eide, Nina Elisabeth; Herfindal, Ivar; Linnell, John Durrus; Andersen, Roy (Research report; Forskningsrapport, 2005-11)
      Fjellrev Alopex lagopus er en av de mest utrydningstruede pattedyr i Norge og det er stort be-hov for kunnskap både om direkte og underliggende årsaker til fjellrevens tilbakegang så vel som mulige tiltak. ”Overvåkningsprosjektet”, ”GIS-analyser”, ”Fjellrev på Finse”, ”Genetikk på fjellrev” og ”Avlsprosjektet”, er alle integrerte delprosjekter i et fellesprosjekt – ”Bevaringsbiologi – fjellrev” ved ...

    • Demographic consequences of harvesting: a case study from a small and isolated moose population 

      Herfindal, Ivar; Lee, Aline Magdalena; Hamel, Sandra; Solberg, Erling Johan; Sæther, Bernt-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-13)
      Harvesting can have a substantial impact on population dynamics and individual performance in wild populations. While the direct consequences of harvest on individual survival and population growth rate are often apparent, harvesting can also have indirect and more subtle demographic consequences. Disentangling these consequences, however, requires in-depth knowledge of individual life histories of ...

    • Environmental effects on spatial population dynamics and synchrony – lessons from northern ecosystems 

      Herfindal, Ivar; Lee, Aline Magdalena; Marquez, Jonatan; Le Moullec, Mathilde; Peeters, Bart; Hansen, Brage Bremset; Henden, John-André; Sæther, Bernt-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-13)
      Environmental variation in time and space generates complex patterns in the spatial structure of temporally covarying populations. Accounting for spatial population structure is important for sustainable management and harvest, but there is a need for a better understanding of the many mechanisms affecting the spatial structure of populations. In the large-scale research project SUSTAIN, detailed ...

    • Predator co-occurrence in alpine and Arctic tundra in relation to fluctuating prey 

      Rød-Eriksen, Lars; Killengreen, Siw Turid; Ehrich, Dorothee; Ims, Rolf Anker; Herfindal, Ivar; Landa, Arild; Eide, Nina Elisabeth (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-18)
      1. Large carnivores influence ecosystem dynamics in multiple ways, for example, by suppressing meso-carnivores and providing carrions for smaller scavengers. Loss of large carnivores is suggested to cause meso-carnivore increase and expansion. Moreover, competition between meso-carnivores may be modified by the presence of larger carnivores. In tundra ecosystems, the smallest meso-carnivore, ...

    • Sustainable management of populations impacted by harvesting and climate change 

      Stenseth, Nils Christian; Ims, Rolf Anker; Sæther, Bernt-Erik; Cadahia, Luis; Herfindal, Ivar; Lee, Aline Magdalena; Whittington, Jason D; Yoccoz, Nigel (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-13)
      The sustainable use of natural resources is critical for addressing the global challenges of today. Strategies for sustainable harvesting need to consider not only harvested species, but also other non-harvested species interacting with them in the same ecosystem. In addition, environmental variation needs to be considered, with climate change currently being one of the main sources of this ...