[1] Univ Gothenburg, Dept Plant & Environm Sci, SE-40530 Gothenburg, Sweden
[2] Univ Tromso, Fac Biosci Fisheries & Econ, Dept Arctic & Marine Biol, N-9037 Tromso, Norway
[3] Univ Ctr Svalbard, Dept Arctic Biol, Longyearbyen, Norway
[4] Univ Ctr Svalbard, Dept Arctic Geol, Longyearbyen, Norway
[5] Univ Ctr Svalbard, Dept Arctic Technol, Longyearbyen, Norway
[6] Univ Copenhagen, Dept Geog & Geol, DK-1350 Copenhagen, Denmark
[7] Univ Orebro, Sch Sci & Technol, Orebro, Sweden