Fig. 8

Macrobenthic zonation in Gröning-Watt (Königshafen Sylt) from a Puccinellia-saltmarsh down to low tide level in 1932 (schematic after Wohlenberg 1937; see Fig. 1) and 7 decades later following a rise in high water level and eutrophication (see text). 1 saltmarsh, 2 Cyanobacteria-mats, 3 Corophium volutator-belt, 4 Arenicola marina, 5 Zostera noltii, 6 Z. marina, 7 Fucus vesiculosus forma mytili anchored by mussels Mytilus edulis, 8 sandy beach, 9 filiform green algal mats of Enteromorpha spp., 10 Chaetomorpha sutoria-mats, 11 lettuce-like green algal mats of Ulva spp