[1] Univ British Columbia, Dept Bot, Vancouver, BC V6T 1Z4, Canada
[2] Alfred Wegener Inst Polar & Marine Res, Biol Anstalt Helgoland, D-27498 Helgoland, Germany
[3] Forschungsinst Senckenberg, Deuzench Zentrum Marine Biodiversitat, Wadden Sea Stn Sylt, D-25992 List Auf Sylt, Germany
[4] Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn Sylt, D-25992 List Auf Sylt, Germany
[5] Koeman Bijkerk BV, Haren, Netherlands
[6] Natl Acad Sci Ukraine, NG Kholodnyi Bot Inst, UA-01001 Kiev, Ukraine
[7] Univ Cologne, CCAC, D-50931 Cologne, Germany
[8] Univ Jena, Inst Ernahrungswissensch, D-07743 Jena, Germany