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General Session 4: Marine environment, ecosystem & sustainability |
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Spatial and temporal distribution of microplastic pollution in tributary of the Three Gorges Reservoir—a case study in Xiangxi River
Monday 9th @ 1155-1215
Room 1
Kai Zhang* , City University of Hong Kong; Institute of Hydrobiology, CAS
Hongjuan Hu, Institute of Hydrobiology, CAS
Xiong Xiong, Institute of Hydrobiology, CAS
Tiancui Li, Institute of Hydrobiology, CAS
Liangyu Wu, Institute of Hydrobiology, CAS
Chenxi Wu, Institute of Hydrobiology, CAS
Paul K. S. Lam, City University of Hong Kong
Presenter Email: zhangkaibill@foxamil.com
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| There is growing concern over microplastic pollution in fresh water system. One of the longest tributary in the TGR – Xiangxi River was seriously polluted by microplastics according to our survey. 7 sampling sites along the river were set. During April 2015 to January 2016, the microplastic surveys were conducted once three months and a total of 28 samples were collected via trawl sampling with a 112 μm mesh net in the surface water of Xiangxi river. Water samples were collected as well to determine the abundance of plankton in the same area. The highest abundance of micoplastics reached 3.4 x 107 particles/km2 and the lowest abundance was as high as 7.8 x 104 particles/km2. The detected microplastics were made of polyethylene, polypropylene, and polystyrene. Generally, it had a higher abundance in downstream of spatial distribution and had a higher abundance in lower water level in July of temporal distribution. According to the analysis of CCA, microplastics have a lower optima value compared to other plankton species with respect to the environmental variables. |
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