1. Bigelow Laboratory for Ocean Sciences, P.O. Box 475, 180 McKown Point Road, West Boothbay Harbor, ME 04575, USA
2. Culture Collection of Algae and Protozoa, Scottish Association for Marine Science, Scottish Marine Institute, Dunstaffnage Marine Laboratory, Dunbeg, Oban, Argyll, PA37 1QA, Scotland, UK
3. Department of Biology, College of William and Mary, Williamsburg, VA 23187, USA
4. School of Botany, University of Melbourne, Parkville, Victoria 3010, Australia
5. Department of Biological Sciences, Old Dominion University, Norfolk VA 23529, USA
6. Institute of Biological Sciences – Applied Ecology, University of Rostock, Albert-Einstein-Strasse 3, D-18057 Rostock, Germany