1. Department of Geography and Geology, University of Copenhagen, Copenhagen, Denmark
2. Marine Biological Laboratory, Department of Biology, University of Copenhagen, Strandpromenaden 5, DK-3000 Helsingør, Denmark
3. Plant Functional Biology and Climate Change Cluster, University of Technology, Sydney PO Box 123 Broadway NSW 2007 Australia
4. The Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll, PA37 1QA, United Kingdom
5. Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, Odense M, Denmark
6. Greenland Climate Research Centre, Kivioq 2, Box 570, 3900 Nuuk Greenland
7. Department of Pharmacy and Analytical Chemistry, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark