Blar i forfatter "Langeland, Knut"

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    • Beregning av produksjon og tap i reindriften 

      Tveraa, Torkild; Ballesteros, Manuel; Bårdsen, Bård-Jørgen; Fauchald, Per; Lagergren, Madeleine; Langeland, Knut; Pedersen, Elisabeth; Stien, Audun (Research report; Forskningsrapport, 2013-05)
      En økning i rovdyrbestandene i reinbeiteområdene regnes av næringen som den viktigste enkeltfaktoren som forårsaker lav kalvetilgang, store tap av dyr og derigjennom lav produksjon i tamreinflokkene i Norge. Endringer i reintall og klimatiske forhold er imidlertid også viktige faktorer som påvirker reproduksjon og overlevelse hos rein. Gitt at predasjon har stor innvirkning på reinens demografi ...

    • Estimating the cumulative impact and zone of influence of anthropogenic features on biodiversity 

      Niebuhr, Bernardo Brandão; Van Moorter, Bram; Stien, Audun; Tveraa, Torkild; Strand, Olav; Langeland, Knut; Sandstrom, Per; Alam, Moudud; Skarin, Anna; Panzacchi, Manuela (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-02)
      1. The concept of cumulative impacts is widespread in policy documents, regu-lations and ecological studies, but quantification methods are still evolving. Infrastructure development usually takes place in landscapes with preexist-ing anthropogenic features. Typically, their impact is determined by computing the distance to the nearest feature only, thus ignoring the potential cumulative impacts of ...

    • How spatial variation in areal extent and configuration of labile vegetation states affect the riparian bird community in Arctic Tundra 

      Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker; Langeland, Knut (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      The Arctic tundra is currently experiencing an unprecedented combination of climate change, change in grazing pressure by large herbivores and growing human activity. Thickets of tall shrubs represent a conspicuous vegetation state in northern and temperate ecosystems, where it serves important ecological functions, including habitat for wildlife. Thickets are however labile, as tall shrubs respond ...

    • Phenology and cover of plant growth forms predict herbivore habitat selection in a high latitude ecosystem 

      Iversen, Marianne; Fauchald, Per; Langeland, Knut; Ims, Rolf Anker; Yoccoz, Nigel Gilles; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      The spatial and temporal distribution of forage quality is among the most central factors affecting herbivore habitat selection. Yet, for high latitude areas, forage quantity has been found to be more important than quality. Studies on large ungulate foraging patterns are faced with methodological challenges in both assessing animal movements at the scale of forage distribution, and in assessing ...