Microplastic pollution is widely distributed from surface water to sediments to groundwater vertically and from land to the ocean horizontally.This study collected samples from surface water,groundwater,and sediments ...Microplastic pollution is widely distributed from surface water to sediments to groundwater vertically and from land to the ocean horizontally.This study collected samples from surface water,groundwater,and sediments from upper to lower reaches and then to the estuary in 16 typical areas in the Jinjiang River Basin,Fujian Province,China.Afterward,it determined the components and abundance of the microplastics and analyzed the possible microplastic sources through principal component analysis(PCA).As a result,seven main components of microplastics were detected,i.e.,polyethylene(PE),polypropylene(PP),polyvinyl chloride(PVC),polyethylene terephthalate(PET),polyformaldehyde(POM),nylon 6(PA6),and polystyrene(PS).Among them,PE and PP were found to have the highest proportion in the surface water and sediments and in the groundwater,respectively.The surface water,groundwater,and sediments had average microplastic abundance of 1.6 n/L,2.7 n/L and 33.8 n/kg,respectively.The microplastics in the sediments had the largest particle size,while those in the groundwater had the smallest particle size.Compared with water bodies and sediments in other areas,those in the study area generally have medium-low-level microplastic abundance.Three pollution sources were determined according to PCA,i.e.,the dominant agriculture-forestry-fishery source,domestic wastewater,and industrial production.This study can provide a scientific basis for the control of microplastics in rivers.展开更多
[Objective]The paper was to provide a scientific basis for protection and utilization of sinipercine fish resources in Jinjiang River,the national resources protection area. [Method]A total of 171 specimens of siniper...[Objective]The paper was to provide a scientific basis for protection and utilization of sinipercine fish resources in Jinjiang River,the national resources protection area. [Method]A total of 171 specimens of sinipercine were collected from Jinjiang River and its branches,identified and statistically counted.[Result]There were three species of wild sinipercine,including Siniperca scherzeri,Coreoperca whiteheadi and Siniperca kneri,with occurrence frequencies of100%,66. 7% and 50%,respectively. They were common species in the river,and S. scherzeri was dominant. The total allowable catch(TAC) of the three species was not big,and the individuals captured were generally small,and with rare mature individuals. [Conclusion]The resources of sinipercine had a preliminary recovery in the region after the foundation of the national resources protection area for aquatic resources in Jinjiang River in 2009.展开更多
Six evaluation factors were selected to evaluate the susceptibility level of the Xixi Watershed to geological disasters such as collapse and landslide, namely formation lithology, rainfall, gradient, aspect, vegetatio...Six evaluation factors were selected to evaluate the susceptibility level of the Xixi Watershed to geological disasters such as collapse and landslide, namely formation lithology, rainfall, gradient, aspect, vegetation and buffer zone. The results showed that Longmen Town, Gongqiao Town, Lianhua Town, and Chengxiang Town in the lower reaches of the Xixi Watershed were more susceptible to geological disasters in case of rainstorm because of the easily-collapsed formation lithology; riverbank erosion by runoff was enhanced during rainstorm, thus both sides of the rivers in Chengxiang Town at the estuary of the Xixi Watershed were most susceptible to geological disasters; in case of rainstorm, geological disaster monitoring in location areas of Longmen Town, Guanqiao Town, Lianhua Town, Chengxiang Town in the lower reaches, particularly trunk streams in Chengxiang Town, should be enhanced. By evaluating environmental geo-disasters of the Xixi Watershed, the blank in the environmental geo-disaster evaluation of the local area will be filled in, and scientific support will be provided for the future prevention of environmental geodisaster.展开更多
基金funded by National Natural Science Foundation of China(41907175 and 41902259)China Geological Survey project(DD20190303).
文摘Microplastic pollution is widely distributed from surface water to sediments to groundwater vertically and from land to the ocean horizontally.This study collected samples from surface water,groundwater,and sediments from upper to lower reaches and then to the estuary in 16 typical areas in the Jinjiang River Basin,Fujian Province,China.Afterward,it determined the components and abundance of the microplastics and analyzed the possible microplastic sources through principal component analysis(PCA).As a result,seven main components of microplastics were detected,i.e.,polyethylene(PE),polypropylene(PP),polyvinyl chloride(PVC),polyethylene terephthalate(PET),polyformaldehyde(POM),nylon 6(PA6),and polystyrene(PS).Among them,PE and PP were found to have the highest proportion in the surface water and sediments and in the groundwater,respectively.The surface water,groundwater,and sediments had average microplastic abundance of 1.6 n/L,2.7 n/L and 33.8 n/kg,respectively.The microplastics in the sediments had the largest particle size,while those in the groundwater had the smallest particle size.Compared with water bodies and sediments in other areas,those in the study area generally have medium-low-level microplastic abundance.Three pollution sources were determined according to PCA,i.e.,the dominant agriculture-forestry-fishery source,domestic wastewater,and industrial production.This study can provide a scientific basis for the control of microplastics in rivers.
基金Supported by Natural Science Foundation of Guizhou Provincial Department of Education"Research on Fish Resources in Sinipercinae in Fanjing Mountain and Neighboring Regions(QJK 010081)Key Support Disciplinary Projects of Colleges and Universities in Guizhou Province"Protection and Utilization of Wild Fauna and Flora"[QJHZDZCXK(2011)232]Featured Laboratory Construction Projects of Guizhou Provincial Department of Education"Key Laboratory of Special Wildlife Resources in Fanjing Mountain"[QJH KY(2011)232]
文摘[Objective]The paper was to provide a scientific basis for protection and utilization of sinipercine fish resources in Jinjiang River,the national resources protection area. [Method]A total of 171 specimens of sinipercine were collected from Jinjiang River and its branches,identified and statistically counted.[Result]There were three species of wild sinipercine,including Siniperca scherzeri,Coreoperca whiteheadi and Siniperca kneri,with occurrence frequencies of100%,66. 7% and 50%,respectively. They were common species in the river,and S. scherzeri was dominant. The total allowable catch(TAC) of the three species was not big,and the individuals captured were generally small,and with rare mature individuals. [Conclusion]The resources of sinipercine had a preliminary recovery in the region after the foundation of the national resources protection area for aquatic resources in Jinjiang River in 2009.
基金Sponsored by 2015 Production Safety and Major Accident Prevention Technology Program of State Administration of Work Safety(Shandong-0052-2015AQ)Scientific Research Foundation of Binzhou University(BZXYG1414)+1 种基金Key Research and Development Program of Shandong Province(2015GNC111018)Natural Science Foundation of Shandong Province(ZR2014BP012)
文摘Six evaluation factors were selected to evaluate the susceptibility level of the Xixi Watershed to geological disasters such as collapse and landslide, namely formation lithology, rainfall, gradient, aspect, vegetation and buffer zone. The results showed that Longmen Town, Gongqiao Town, Lianhua Town, and Chengxiang Town in the lower reaches of the Xixi Watershed were more susceptible to geological disasters in case of rainstorm because of the easily-collapsed formation lithology; riverbank erosion by runoff was enhanced during rainstorm, thus both sides of the rivers in Chengxiang Town at the estuary of the Xixi Watershed were most susceptible to geological disasters; in case of rainstorm, geological disaster monitoring in location areas of Longmen Town, Guanqiao Town, Lianhua Town, Chengxiang Town in the lower reaches, particularly trunk streams in Chengxiang Town, should be enhanced. By evaluating environmental geo-disasters of the Xixi Watershed, the blank in the environmental geo-disaster evaluation of the local area will be filled in, and scientific support will be provided for the future prevention of environmental geodisaster.
