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Lei Y.L.,CAS Qingdao Institute of Oceanology | Li T.G.,CAS Qingdao Institute of Oceanology | Bi H.,University of Maryland Center for Environmental science | Cui W.L.,The Organization of North China Sea Monitoring Center | And 3 more authors.
Marine Pollution Bulletin | Year: 2015

The 2011 oil spill in the Bohai Sea was the largest spill event in China. Nine sediment cores were taken near the spill site and environmental factors including Polycyclic Aromatic Hydrocarbon (PAHs), oils, sulfides, organic carbon were measured 6. months later. Benthic foraminifera were separated into >150. μm (large) and 63-150. μm (small) size fractions for 2-cm depth interval of each sediment core. Statistical analyses suggested that the species composition of living foraminifera was impacted by oils, PAHs and sulfides. Large foraminifera were more sensitive to the oils than the small. Abnormal specimens were positively correlated with oils or PAHs. Small forms, however, tended to have high reproduction and mortality. Pollution-resistant and opportunistic taxa were identified to calculate a Foraminiferal Index of Environmental Impacts (FIEI). The FIEI increased from low to high oil-polluted station and from deep layer to surface sediment reflects the impact of oil pollution in this area. © 2015 The Authors. Source

Li X.,Huaihai Institute of Technology | Leng Y.,The Organization of North China Sea Monitoring Center | Dong Z.,Huaihai Institute of Technology | Liu Y.,The Organization of North China Sea Monitoring Center | And 3 more authors.
Conservation Genetics Resources | Year: 2014

The mud snail Bullacta exarata is commercially one of the most important marine snails in China, endemic to the coastlines of north-east China and west South Korea. However there is controversy regarding whether the mud snail is an invasive species or whether Laizhou Bay has a historical natural distribution, with little information available on population genetics. In this study, 14 novel polymorphic microsatellite loci were isolated from the mud snail, and characterized in wild stock from Laizhou Bay of China. The number of alleles varied between 4 and 19, and the observed and expected heterozygosity at the population level varied from 0.1875 to 1.0000 and 0.7172 to 0.9379, respectively. Five locus Bex26-166, Bex28-188, Bex29-115, Bex32-179 and Bex34-148 significantly deviated from the Hardy-Weinberg equilibrium (P < 0.01). These microsatellite markers will be useful for population genetics, alien and invasive species identification, parentage studies of this species. © 2013 Springer Science+Business Media Dordrecht. Source

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