Native European flat oyster (Ostrea edulis) reefs have strongly declined in the Dutch Delta, motivating restoration efforts that use engineered substrates to support settlement and early reef development. In Lake Veere, Project Asta tests the Mother Reef concept: biodegradable clay blocks that are conditioned …

The restoration of native flat oyster (Ostrea edulis) reefs in Lake Veere is a key ecological goal of the Oyster Heaven project. However, successful reef development may be hindered by predation. The European green crab *(Carcinus maenas),* a known bivalve predator in Lake Veere. This study investigated …

Blue mussels (Mytilus edulis) create niches in the Wadden Sea and therefore they are important for the Wadden Sea. Because there are less mussel beds in the Wadden Sea than would be expected and because of their important role, they are monitored since the mid-nineties. It was found that some beds were …