Motr

In aqutic ecosystems,plants and animals live in water.These species are adapted to live in different types of aquatic habibates.The special abiotic features are its physical aspects such as the quality of the water ,which includes it s clarity,salinity,Oxygen content and rate of flow .aquatic ecosytems may be classified as being stagnant ecosystems or running water ecosystems.The mud gravel or rocks that form the bed of the aquatic ecosystems are also classified in to freshwater,brackish and marine ecosystems,which are based on the slaianity levels.
The fresh water ecosystems that have running water are streams and rivers.Ponds,tanks and lakes are ecosystems where water does not flow .wetlands are special ecosystems in which the water level fluctures dramtically in different seasons .They have expenses of shallow water with aquatic vegetation,which forms an ideal habitat for fish,crustaceans and water birds.
Marine ecosystems are highly saline,while brajcish areas have less sline water such as in river deltas.Coral reefs are very rich in species and are found in only a few shallow tropical seas .The richest coral reefs in India are around the Andaman and Nicobar Islands and in the Gulf of Kutch .
Brackish water ecosystems in river deltas are covered by mangrove forests and are among the worlds most productive ecosystems in items of biomass production.The largest manganore swamps are in the sunderbans in the delta of the Ganges river