1. Norwegian Geotechnical Institute (NGI), P.O. Box 3930 Ullevål Stadium, N-0806 Oslo, Norway
2. , Stockholm University, 10691 Stockholm, Sweden
3. Department of Plant and Environmental Sciences, University of Life Sciences, Ås, Norway
4. Department of Geosciences, Oslo University, Oslo, Norway
5. Department of Systems Ecology, Stockholm University, 106 91 Stockholm, Sweden
6. Department of Contaminant Research, Swedish Museum of Natural History, 104 05 Stockholm, Sweden
7. Marine Bunndyr AS, Trondheim, Norway