The following taxa were considered as the key species (habitat-forming species) in the study area:
Fucus vesiculosus, Furcellaria lumbricalis, Zostera marina, other higher plants (Stuckenia pectinata, Potamogeton spp., Ruppia sp., Zannichellia palustris, Myriophyllum spicatum, Ranunculus baudotii, etc.), charophytes, bivalves, and cirripeds (Mytilus trossulus, Dreissena polymorpha, Macoma balthica, Mya arenaria, and Amphibalanus improvisus).