1. Section Functional Ecology; Department Seaweed Biology; Alfred-Wegener-Institute Helmholtz Centre for Polar and Marine Research; Am Handelshafen 12 Bremerhaven 27570 Germany
2. Section Functional Ecology; Department Seaweed Biology; Alfred-Wegener-Institute Helmholtz Centre for Polar and Marine Research; Biologische Anstalt Helgoland Helgoland 27498 Germany
3. Biocenter Klein Flottbek; University Hamburg; Ohnhorststr. 18 Hamburg 22609 Germany