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Browsing NIBIO Brage by Author "Bjerke, Jarle W."

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    • High tolerance of a high-arctic willow and graminoid to simulated ice encasement 

      Bjerke, Jarle W.; Elverland, Ellen; Jaakola, Laura; Lund, Leidulf; Zagajewski, Bogdan; Bochenek, Zbigniew; Kłos, Andrzej; Tømmervik, Hans (Journal article; Peer reviewed, 2018-12-17)
      Climate change-induced snow thaw and subsequent accumulation of ice on the ground is a potential, major threat to snow-dominated ecosystems. While impacts of ground-ice on arctic wildlife are well explored, the impacts on ...
    • Impact of Multiple Ecological Stressors on a Sub-Arctic Ecosystem: No Interaction Between Extreme Winter Warming Events, Nitrogen Addition and Grazing 

      Bokhorst, Stef; Berg, Matty P.; Edvinsen, Guro Kristine; Ellers, Jacintha; Heitman, Amber; Jaakola, Laura; Mæhre, Hanne K; Phoenix, Gareth K.; Tømmervik, Hans; Bjerke, Jarle W. (Journal article; Peer reviewed, 2018-11-30)
      Climate change is one of many ongoing human-induced environmental changes, but few studies consider interactive effects between multiple anthropogenic disturbances. In coastal sub-arctic heathland, we quantified the impact ...
    • Low impact of dry conditions on the CO2 exchange of a Northern-Norwegian blanket bog 

      Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Engelsen, Ola; Hansen, Georg Heinrich; Parmentier, Frans-Jan W.; Powell, Thomas; Silvennoinen, Hanna Marika; Sottocornola, Matteo; Tømmervik, Hans; Weldon, Simon Mark; Rasse, Daniel (Journal article; Peer reviewed, 2015)
      Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra ...
    • Springtime grazing by Arctic-breeding geese reduces first- and second-harvest yields on sub-Arctic agricultural grasslands 

      Bjerke, Jarle W.; Tombre, Ingunn; Hanssen, Marvell; Olsen, Anne Kari Bergjord (Peer reviewed; Journal article, 2021-06-22)
      Large population increases of Arctic-breeding waterfowls over recent decades have intensified the conflict with agricultural interests in both Eurasia and North America. In the spring-staging region Vesterålen in sub-Arctic ...
    • Vulnerability and resilience of the carbon exchange of a subarctic peatland to an extreme winter event 

      Parmentier, Frans-Jan; Rasse, Daniel P.; Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Weldon, Simon Mark; Tømmervik, Hans; Hansen, Georg Heinrich (Journal article; Peer reviewed, 2018-06-01)
      Extreme winter events that damage vegetation are considered an important climatic cause of arctic browning—a reversal of the greening trend of the region—and possibly reduce the carbon uptake of northern ecosystems. ...
    • Vulnerability and resilience of the carbon exchange of a subarctic peatland to an extreme winter event 

      Parmentier, Frans-Jan W.; Rasse, Daniel; Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Weldon, Simon Mark; Tømmervik, Hans; Hansen, Georg Heinrich (Journal article; Peer reviewed, 2018)
      Extreme winter events that damage vegetation are considered an important climatic cause of arctic browning—a reversal of the greening trend of the region—and possibly reduce the carbon uptake of northern ecosystems. ...
    • Yield reductions in agricultural grasslands in Norway after springtime grazing by pink-footed geese 

      Olsen, Anne Kari Bergjord; Bjerke, Jarle W.; Tombre, Ingunn (Journal article; Peer reviewed, 2017-04-03)
      1.A large population increase of the Svalbard-breeding pink-footed goose Anser brachyrhynchus over recent decades has intensified the conflict with agriculture at the spring-staging sites in Norway. Knowledge of the yield ...

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