Maryam Zarghami Tariq H.Y. Al-Maliky Fatemeh Nazarhaghighi Masoomeh Sohrabi Mollayousefi Young Researchers and Elite Club, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran Department of Marine Biology, Marine Science Center, Basrah University, Basrah, Iraq Young Researchers and Elite Club, Rasht Branch, Islamic Azad University, Rasht, Iran Department of Geology, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran Proceedings of the International Academy of Ecology and Environmental Sciences ISSN 2220-8860 http://www.iaees.org/publications/journals/piaees/online-version.asp 2019 9 2 24 43 International Academy of Ecology and Environmental Sciences Hong Kong 18 February 2019 20 March 2019 1 June 2019 urban pollution foraminifera Caspian Sea total organic matter benthic The Caspian Sea has characteristics common to both seas and lakes and listed as the world's largest lake. This study investigates recent foraminifera from sediment samples collected during spring, summer, autumn and winter 2012 from 12 stations (ranging in depths 5, 10, 20 and 50 meters) in the Southern Caspian Sea from Behshahr to Ramsar. Associated factors includes: grain size, Total phosphate, Total nitrate, total organic matter and calcium carbonate concentration were also measured. The benthic environmental factors including temperature, dissolved oxygen, salinity and pH were measured by CTD during the sampling time. Recognized benthic foraminifera species belong to 6 genera of 5 families were identified. Eleven benthic foraminifer's taxa were identified from the samples. They were Ammonia beccarii caspica, Ammonia tepida, Ammonia parkinsoniana, Elphidium littorale caspicus, Elphidium excuavatum, Criboelphidium sp., Ammobaculites agglutinans, Ammotium sp., Miliammina fusca, Milliammina sp. and Cornuspira sp. The cosmopolitan Ammonia beccarii caspica was common in the studied area. The density of benthic foraminifera is significantly correlated with seasons, the highest density being observed in winter, most density of foraminifera was observed in Babolsar stations that showed a good situation for living there and we can use foraminifera such as bioindicator for pollutant area. http://www.iaees.org/publications/journals/piaees/articles/2019-9(2)/effect-of-urban-pollutants-on-distribution-of-benthic-foraminifera.pdf