Blar i forfatter "Wiedmann, Magnus Aune"

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    • Does juvenile herring (Clupea harengus) affect the capelin (Mallotus villosus) recruitment in the Barents Sea? - A model study for the years 2001 - 2003 focusing on capelin larvae mortality, spawning sites and drift patterns 

      Wiedmann, Magnus Aune (Master thesis; Mastergradsoppgave, 2010-06-04)
      Barents Sea capelin (Mallotus villosus) year class strength is thought to be determined during the first months after egg hatching. The now widely accepted Hamre’s hypothesis states that young herring (Clupea harengus) present in the southern Barents Sea potentially may cause poor capelin recruitment. This hypothesis was presently tested through model scenarios, by simulating a realistic spatio-temporal ...

    • Functional diversity of the Barents Sea fish community 

      Wiedmann, Magnus Aune; Aschan, Michaela; Certain, Gregoire; Dolgov, Andrey V.; Greenacre, Michael; Johannesen, Edda; Planque, Benjamin; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      This paper provides the first assessment of the functional diversity (FD) of the Barents Sea fish community. FD is recognized as an important driver of ecosystem functions and, thus, governs the adaptability of ecosystems in the face of disturbance. We integrate ecosystem survey data with an extensive trait matrix and show that fish FD displayed large spatial variation. The study period (2004 to ...

    • A trait-based assessment of the Barents Sea fish community: implications for vulnerability under environmental change 

      Wiedmann, Magnus Aune (Doctoral thesis; Doktorgradsavhandling, 2014-06-06)
      SUMMARY This is a study of the fish community in the Barents Sea and its vulnerability to disturbance such as fishing and climate change. The vulnerability of the fish community depends on its sensitivity to, and adaptability under, stress. To assess these two components of vulnerability, I have combined survey data from the Barents Sea with information about the species properties (i.e., ...