2. Données et outils
  3. Rechercher un habitat
  4. MA5-25 - Sable vaseux médiolittoral dominé par des polychètes ou des bivalves en Atlantique
  5. Description
MA5-25 - Sable vaseux médiolittoral dominé par des polychètes ou des bivalves en Atlantique

Polychaete/bivalve-dominated Atlantic littoral muddy sand
MA5-24 - Sable fin médiolittoral dominé par les polychètes/amphipodes en Atlantique

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Muddy sand or fine sand, often occurring as extensive intertidal flats on open coasts and in marine inlets. The sediment generally remains water-saturated during low water. The habitat may be subject to variable salinity conditions in marine inlets. An anoxic layer may be present below 5 cm of the sediment surface, sometimes seen in the worm casts on the surface. The infauna consists of a diverse range of amphipods, polychaetes, bivalves and gastropods.
Situation: Muddy sand communities are found predominantly on the mid and lower shore, though they may span the entire intertidal. Fine sand or mobile sand communities may be present on the upper shore with muddy sand communities present lower down. In sheltered mid estuarine conditions, muddy sand communities may be present on the upper part of the shore with mid estuarine muddy shore communities (MA6-22) lower down.

Bibliographie

European Topic Centre on Biological Diversity 2022. EUNIS marine habitat classification 2022 including crosswalks. Table Excel. (Source)