Blar i NIVA Open Access Archive på forfatter "Hessen, Dag O"

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    • Current Browning of Surface Waters Will Be Further Promoted by Wetter Climate 

      de Wit, Heleen A.; Valinia, Salar; Weyhenmeyer, Gesa A; Futter, Martyn N.; Kortelainen, Pirkko; Austnes, Kari; Hessen, Dag O; Raike, Antti; Laudon, Hjalmar; Vournenmaa, Jussi (Journal article; Peer reviewed, 2016)
      Browning of surface waters because of increasing terrestrial dissolved organic carbon (OC) concentrations is a concern for drinking water providers and can impact land carbon storage. We show that positive trends in OC in ...

    • The role of photomineralization for CO2 emissions in boreal lakes along a gradient of dissolved organic matter 

      Allesson, Lina; Koehler, Birgit; Thrane, Jan-Erik; Andersen, Tom; Hessen, Dag O (Peer reviewed; Journal article, 2020)
      Many boreal lakes are experiencing an increase in concentrations of terrestrially derived dissolved organic matter (DOM)—a process commonly labeled “browning.” Browning affects microbial and photochemical mineralization ...

    • UV radiation affects antipredatory defense traits in Daphnia pulex 

      Eshun-Wilson, Franceen; Wolf, Raoul; Andersen, Tom; Hessen, Dag O; Sperfeld, Erik (Peer reviewed; Journal article, 2020)
      In aquatic environments, prey perceive predator threats by chemical cues called kairomones, which can induce changes in their morphology, life histories, and behavior. Predator‐induced defenses have allowed for prey, such ...