[1] Univ Rostock, Inst Biowissensch, Abt Pflanzenphysiol & Okol, D-18059 Rostock, Germany
[2] Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, NL-1018 WS Amsterdam, Netherlands
[3] Univ Rostock, Inst Pathol, Elektronenmikroskop Zentrum, D-18055 Rostock, Germany
[4] Netherlands Inst Ecol, Ctr Limnol, Dept Foodweb Studies, NL-3631 AC Nieuwersluis, Netherlands
[5] Swiss Fed Inst Aquat Sci & Technol, Ctr Ecol Evolut & Biogeochem, CH-6047 Kastanienbaum, Switzerland