1. Sustainability Research Center (artec) & Department of Resilient Energy Systems; University of Bremen; Enrique-Schmidt-Str. 7, D-28359 Bremen Germany
2. Integrative Ecophysiology Section; Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research; Am Handelshafen 12, D-27570 Bremerhaven Germany
3. Department of Theoretical Ecology and Modelling; Leibniz Center for Tropical Marine Ecology; (ZMT), Fahrenheitstr. 6, D-28359 Bremen Germany
4. Faculty of Biology and Chemistry; University of Bremen; Postfach 33 04 40, D-28334 Bremen Germany