[1] NGI, N-0806 Oslo, Norway
[2] Stockholm Univ, Appl Environm Sci ITM, S-10691 Stockholm, Sweden
[3] Univ Life Sci, Dept Plant & Environm Sci, As, Norway
[4] Univ Oslo, Dept Geosci, Oslo, Norway
[5] Stockholm Univ, Dept Syst Ecol, S-10691 Stockholm, Sweden
[6] Swedish Museum Nat Hist, Dept Contaminant Res, S-10405 Stockholm, Sweden
[7] Marine Bunndyr AS, Trondheim, Norway