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Fauna and standing crop of freshwater mussels in Poyang Lake, China

Chinese Journal of Oceanology and Limnology 2012年第1期30卷 124-135页

作者： XIONG Liufeng OUYANG Shan WU Xiaoping College of Life Sciences and Food Engineering Nanchang UniversityNanchang 330031China College of Animal Science and Technology Jiangxi Agricultural UniversityNanchang 330045China

freshwater mussels are a major component of the zoobenthos and they therefore play an important role in freshwater ecosystems. The community composition and the standing crop of freshwater mussels in Poyang Lake, the largest freshwater lake in China and one of two lakes connected to the Changjiang （Yangtze） River, were investigated from February 2008 to May 2009. mussels were sampled in hydrologically and geographically distinct sampling areas. A total of 42 species and 13 genera were identified, of which 32 species were endemic to China. Two species, Unio douglasiae and Lamprotula caveata, dominated all sampling areas. The number of genera and species, and the number of species within each genus, differed significantly among sampling areas. freshwater mussels were very abundant, with an overall density of 0.28±0.22 ind./m-＇ and biomass of 4.08±3.96 g/m^2. Significant variation observed among sampling areas and among genera was probably due to the variety of habitats among the areas sampled and to the adaptability of different freshwater mussels to environments. This study suggests that Poyang Lake and other freshwater lakes in the region are important sites of freshwater mussel biodiversity and conservation.

关键词： fauna standing crop freshwater mussels freshwater lake Poyang Lake conservation

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Occurrence and fate of chlorinated methylsiloxanes in surrounding aqueous systems of Shengli oilfield, China

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Journal of Environmental Sciences 2023年第3期125卷 332-339页

作者： Nannan Liu Jie Zhang Xudan He Lin Xu Yaqi Cai School of Environmental and Municipal Engineering Tianjin Chengjian UniversityTianjin 300384China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental ScienceChinese Academy of SciencesBeijing 100085China Institute of Resources and Environment Beijing Academy of Science and TechnologyBeijing 100089China School of Environment Hangzhou Institute for Advanced StudyUCASHangzhou 330106China University of Chinese Academy of Sciences Beijing 100049China

Mono-chlorinated products of cyclic volatile methylsiloxanes(cVMS),i.e.,Monochlormethylheptamethylcyclotetrasiloxane[D3D(CH_(2)Cl)],monochlormethylnonamethylcyclopentasiloxane[D4D(CH_(2)Cl)],and monochlormethylundemethylcyclohexasiloxane[D5D(CH_(2)Cl)],were detected in water[freshwater mussels(n=1050)collected from six lakes,concentrations of chloro-cVMS ranged from 9.8-998 ng/g dw in Anodonta woodiana and 8.4-970 ng/g dw in Corbicula *** with parent cVMS,chloro-cVMS had 1.1-1.5 times larger biota-sediment accumulation factors(2.1-3.0)and 1.1-1.7 times longer half-lives(13-42 days).Their stronger persistence in sediment and bioaccumulation in freshwatermussels suggested that environmental emission,distribution and risks of chloro-cVMS deserve further attention.

关键词： Chlorinated methylsiloxanes Oilfield Sediment freshwater mussels Bioaccumulation

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