title: Effects of chemically enhanced water-accommodated fraction of Iranian heavy crude oil on periphytic microbial communities in microcosm experiment.
abstract: Exposure experiments were conducted to determine the effects of an oil spill on a periphytic microbial community with the chemically enhanced water-accommodated fraction (CEWAF) of Iranian Heavy Crude oil in a microcosm containing artificial benthic substrates. Bacteria and heterotrophic nano-flagellates (HNF) grew well in all the treatments, except for the 100% CEWAF exposure. However, periphyton did not adapt to concentrations of CEWAF ≥ 20%. Among the periphyton, Cylindrotheca spp. dominated under treatment conditions, and the response of Cylindrotheca spp. to CEWAF (i.e., particularly 10%) closely followed the changes in chlorophyll a concentration. The concentrations of petroleum hydrocarbons from 10% and 20% CEWAF seemed to have a negative effect on periphyton and a growth-promoting effect on bacteria and HNF, respectively.
authors: Department of South Sea Environmental Research, Korea Institute of Ocean Science and Technology (KIOST), Geoje 656-834, Republic of Korea. baeksh@kiost.ac
authors: Seung Ho
authors: SH
authors: Baek
authors: Moonho
authors: M
authors: Son
authors: Won Joon
authors: WJ
authors: Shim
mesh_terms: D001419:Bacteria / Q000187:drug effects; D018441:Biofilms / Q000187:drug effects*; D017753:Ecosystem; D005658:Fungi / Q000187:drug effects; D007492:Iran; D008954:Models, Biological; D008956:Models, Chemical; D010578:Petroleum / Q000633:toxicity*; D059392:Petroleum Pollution; D014871:Water Microbiology
chemical_list: D010578:Petroleum