[1] Univ Essex, Dept Biol Sci, Colchester CO4 3SQ, Essex, England
[2] Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA
[3] Rutgers State Univ, Inst Marine & Coastal Sci, New Brunswick, NJ 08901 USA
[4] Rutgers State Univ, Dept Geol, New Brunswick, NJ 08901 USA
[5] Boston Univ, Dept Biol, Boston, MA 02215 USA
[6] Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England
[7] Univ Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, Scotland
[8] Univ Maryland, Horn Point Lab, Cambridge, MD 21613 USA
[9] Inst Meereskunde, D-24105 Kiel, Germany
[10] Univ Illinois, Dept Crop Sci, Urbana, IL 61801 USA
[11] Natl Univ Ireland Univ Coll Dublin, Dept Bot, Dublin 4, Ireland
[12] Fisheries & Oceans Canada, Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada
[13] Max Planck Inst Biogeochem, D-07743 Jena, Germany
[14] Univ Dundee, Dept Biol Sci, Dundee DD1 4HN, Scotland
[15] Duke Univ, Dept Bot, Durham, NC 27708 USA
[16] Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany
[17] Dalhousie Univ, Halifax, NS B3H 4J1, Canada
[18] W Virginia Univ, Dept Biol, Morgantown, WV 26506 USA
[19] Univ Wyoming, Dept Bot, Laramie, WY 82071 USA
[20] Univ Wales, Sch Ocean Sci, Menai Bridge PP59 5EY, Gwynedd, Wales