Carbon stable isotopic fractionation associated with biosynthesis of fatty acids by marine microalgae under the stress of oil spills
LIU Yu1, YAO Jing-yuan1, LI Ying2, FENG Tian-shu1
1. College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China;
2. Environmental Information Institute, Dalian Maritime University, Dalian 116026, China
Abstract：In order to realize the effects of oil spill on marine microalgae growth, we studied the carbon stable isotope composition (δ13C) of Chaetoceros gracilis under the stress of different content of water accommodated fraction (WAF) of No.180 fuel oil. The result shows that the rate of fatty acid synthesis are affected by different degree of the stress of WAF in the process of microalgae growth, especially there are approximately linear relationships between the δ13C values of unsaturated fatty acids (16:1 and 18:4) and WAF, which may result from the kinetic stable isotope fractionation effect. Therefore parts of unsaturated fatty acids such as 16:1 may be used as an alternative biomarker for estimating the pollution degree of oil spills.
LIU Yu,YAO Jing-yuan,LI Ying et al. Carbon stable isotopic fractionation associated with biosynthesis of fatty acids by marine microalgae under the stress of oil spills[J]. Marine Environmental Science, 2015, 34(1): 54-57,65.
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