Oligochaetes in reduced or low salinity gravel or coarse sand shores
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Coarse sands and gravel are often associated with the lower shore river channel in estuaries where the sediment is coarse and mobile due to strong river flow and subject to a reduced salinity. There is usually very little mud in the sediment. Oligochaetes, including Heterochaeta costata and enchytraeid oligochaetes dominate the infaunal assemblage with a few polychaetes being recorded in most cases. Other species that may be found, but only sporadically include Bathyporeia spp., Hediste (Nereis) diversicolor, Nephtys hombergii, Scolelepis squamata, Corophium volutator and Hydrobia spp. Depending on the degree of mobility, any pebbles and small cobbles that are present may have Enteromorpha attached. This biotope is restricted in mid and upper estuary situations to areas where finer material is consistently washed out by draining water or river flow.|
|Has Current Version||1|
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