Blar i forfatter "Carroll, Jolynn"

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    • Effects of mortality changes on biomass and production in Calanus spp. populations 

      Skardhamar, Jofrid; Reigstad, Marit; Carroll, Jolynn; Eiane, Ketil; Wexels Riser, Christian; Slagstad, Dag (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-04-28)
      Calanus species are the main link between primary producers and higher trophic-level organisms in the Barents Sea. The natural mortality rate is an essential parameter for determining the standing stock of Calanus, but it is also one of the most uncertain parameters in present knowledge. The level of human activity, and the associated risk of pollution, is increasing in the Barents Sea, and knowledge ...

    • Experimental studies of reproduction and feeding for two Arctic-dwelling Calanus species exposed to crude oil 

      Jensen, Louise Kiel; Carroll, Jolynn (Journal article; Tidsskriftartikkel; Peer reviewed, 2010-09-30)
      Copepods of the genus Calanus are keystone species in the transfer of energy from lower to higher trophic levels of the Arctic/sub-Arctic food web. We performed experimental tests on the reproduction and feeding of Calanus spp. exposed to the water-soluble fraction (WSF) of crude oil. Fecal pellet and egg production were examined for females of C. glacialis exposed to WSF (16 EPA) concentrations of ...

    • Spatio-temporal patterns of PAHs, PCBs and HCB in sediments of the western Barents Sea 

      Zaborska, Agata; Carroll, Jolynn; Pazdro, Ksenia; Pempkowiak, Janusz (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-11-25)
      We examine the composition and levels of organic contaminants (PAHs, PCB, HCB) in four sediment cores collected from the Barents Sea. We assess the influence of temporal variations in contaminant supplies and post-depositional reworking on contaminant distribution. Anthropogenic levels of ∑ 12PAH reached 95 ng g<sup>−1</sup>, higher inventories dominated by BKF were observed at southern stations, ...