Abstract
Abstract − To improve sediment quality in eutrophic coastal areas using benthic microalgae, we examined theeffects of temperature and salinity on the growth of benthic microalgae Achnanthes sp., Amphora sp., Naviculasp. and Nitzschia sp. isolated from Sujeong Bay, Korea, using batch cultures. The maximum growth rates wereobtained under the combined temperature and salinity conditions of 25 o C and 25 psu for Achnanthes sp. (0.60/day), 15 o C and 25 psu for Amphora sp. (0.56 /day), 20 and 30 psu for Navicula sp. (0.53 /day), 20 o C and25 psu for Nitzschia sp. (0.48 /day). Considering these results of temperature and salinity conditions requiredfor optimum growth (≥ 70% of maximum specific growth rate), Amphora sp. Navicula sp. and Nitzschia sp.were characterized as eurythermal and euryhaline species, while Achnanthes sp., which exhibited extremely lowsurvival at low temperature. In conclusion, Amphora sp., Navicula sp. and Nitzschia sp. may be useful speciesfor phytoremediation, to control eutrophication and hypoxic water and thus improve environmental conditionsof polluted coastal areas.Keywords: Benthic microalgae(저서미세조류), Achnanthes sp., Amphora sp., Navicula sp., Nitzschia sp.,Growth(성장), Temperature(수온), Salinity(염분), Phytoremediation(식물환경복원 )
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