Environmental
conditions such as the type of sediment, salinity and depth below the
surface, giving a very large variety of regional areas of the ocean
floor kedaerah other oceans. so do not mngherankan if it menyebabkanberbedanya types of fauna in different areas. In fact benthic fauna are often found in groups that have distinctive properties known as communities. Where does this relate to the specific environmental conditions. Biasanyan
community dominated by one or two jnis fauna (species) of which they
are known, are accompanied by organisms that are subdominant. For
example venus communities, which are often found in the sand in the
offshore environment is dominated by bivalve molluscs venus striatula. Biasanyan
they can be found together with sea-urchin Echinodermata cordatum, as
well as other bivalves, worms and amphipod crustasea polychete. Amphiura
community environment found in mud off the coast, has two species,
namely the dominance of bristle brissopsis lyrifera and amphiura
chiajei. Subdominant fauna that live together they are some classes of bivalve molluscs and polychaete.Community
of certain animals often found widely scattered provided that suitable
environmental conditions of his life, even though they are in a
different geographic location. For
example, a community dominated by bivalves Macoma, which are shallow
and low salinity waters at a depth of about 10-60 mter in some parts of
the world. Mya types of shellfish Cardium and cacaing polychaete Arenicola usually live together with them. Nevertheless, the fact Macoma species and other animals that live together, divided into different geographical areas:Naguta Macoma, Macoma is a member of the dominant society of the region off the coast of the Pacific in North America. They are accompanied by animals Arenaria Mya, Cardium Corbis and Arenicola claparedei.Macoma calcarea dominated areas in the arctic marine animals diserti with Mya truncatum and Cardium ciatiatum.Macoma balthica holds a dominating role in the animal community in the north east Atlantic ocean. Animals subdominant which menyaertai they are Mya Arenaria, Cardium edule and Arenicola marina.
