The Effect of Sewage Pollutant of Bandar Imam Petrochemical Company on Benthic Macrofauna Community Using Biodiversity Indices and Bioindicators

Macrobenthos are an important part of sea-bed fauna which include Polycheata, Decapoda and Mollusca. Some species of this group are considered as biological indicators for aquatic ecosystem. Macrobenthos are mostly inhabitants without migration and they can be used as indexes of ecological crises related to water. In the present research, benthic community structure in Ghanam creek and region of Mossa creek, It is located around B.I.P.C sewage outlet were studied, eight station were selected, and water & sediment samples were collected in two season warm (September) and cold (February). Result of research indicated that station of sewage outlet around had least species and higher organic matter, on the contrary, the station far from petrochemical industry (station located in Ghanam creek) activities had higher species diversity. Also, present study showed that Polychaetes, reference of pollution bioindicators had higher aboundance. Cosequently, macrobenthic biodiversity relation with dissolved oxyqen and percentage of organic matter in the sediment.