Most urban rivers play an important role in urban flood control and drainage in China,but pollution is fast becoming an issue of greater importance in water management.In this study,63 zooplankton species were recorde...Most urban rivers play an important role in urban flood control and drainage in China,but pollution is fast becoming an issue of greater importance in water management.In this study,63 zooplankton species were recorded in four downtown rivers in Shanghai between November 2007 and October 2008.Of these,44 species belonged to the Rotifera,13 to Cladocera,and six to Copepoda.The three most frequently occurring zooplankton(Brachionus calyciflorus,Microcyclops leuckarti,and Asplanchna priodonta)accounted for 80.00%,76.84%,and 53.68%,respectively.Rotifera were found to be dominant,comprising86.26%of total zooplankton,while cladoceran and copepod abundance amounted to 5.08%and 8.67%,respectively.Water temperature,salinity,electrical conductivity,and total nitrogen were of the greatest significance in the occurrence of zooplankton.Two species(Schmackeria forbesi and Lepadella ovalis)were notably more sensitive to environmental factors such as salinity and electrical conductivity than other species.The population size and community were inversely correlated with the increasing nutrient levels of the four rivers,suggesting that the water quality of the four rivers had been gradually recovering from a severe eutrophic state and that water conditions of the rivers had been gradually improved.展开更多
目的探索上海城区住区与绿地环境成蚊侵害状况,并分析其产生的公共卫生影响。方法选取上海中心城区不同住区与绿地环境类型设置8个CO2捕蚊机监测点,于2013年4-11月进行224 d连续性成蚊监测。结果住区与绿地环境的最优势蚊种分别为白纹...目的探索上海城区住区与绿地环境成蚊侵害状况,并分析其产生的公共卫生影响。方法选取上海中心城区不同住区与绿地环境类型设置8个CO2捕蚊机监测点,于2013年4-11月进行224 d连续性成蚊监测。结果住区与绿地环境的最优势蚊种分别为白纹伊蚊和淡色库蚊,密度差异显著,住区的白纹伊蚊密度及构成比均显著高于绿地环境[11.90 vs 2.18只/(d·机器),72.4%vs 18.9%,P值均<0.01)],绿地的淡色库蚊密度及构成比显著高于住区环境[8.28 vs 4.21只/(d·机器),73.9%vs 25.6%,P值均<0.01];趋势分析显示,住区环境的白纹伊蚊侵害最为显著[有13个旬的密度超过10只/(d·机器)],白天时段与傍晚时段住区环境成蚊密度亦均显著高于绿地环境(t=-6.493,P=0.000;t=-4.275,P=0.000)。结论住区与绿地环境蚊虫种群构成及侵害状况明显不同,造成的公共卫生影响亦有差别,在蚊虫防治措施的制定上需要因地制宜,有的放矢。展开更多
基金Supported by the National Natural Science Foundation of China(Nos.30700064,41372365)the Key Project of Shanghai Municipal Science and Technology Commission(Nos.08DZ1203102,09DZ120010A)+1 种基金the Natural Science Foundation of Shanghai City(No.13ZR1413100)the Fundamental Research Funds for the Central Universities
文摘Most urban rivers play an important role in urban flood control and drainage in China,but pollution is fast becoming an issue of greater importance in water management.In this study,63 zooplankton species were recorded in four downtown rivers in Shanghai between November 2007 and October 2008.Of these,44 species belonged to the Rotifera,13 to Cladocera,and six to Copepoda.The three most frequently occurring zooplankton(Brachionus calyciflorus,Microcyclops leuckarti,and Asplanchna priodonta)accounted for 80.00%,76.84%,and 53.68%,respectively.Rotifera were found to be dominant,comprising86.26%of total zooplankton,while cladoceran and copepod abundance amounted to 5.08%and 8.67%,respectively.Water temperature,salinity,electrical conductivity,and total nitrogen were of the greatest significance in the occurrence of zooplankton.Two species(Schmackeria forbesi and Lepadella ovalis)were notably more sensitive to environmental factors such as salinity and electrical conductivity than other species.The population size and community were inversely correlated with the increasing nutrient levels of the four rivers,suggesting that the water quality of the four rivers had been gradually recovering from a severe eutrophic state and that water conditions of the rivers had been gradually improved.
文摘目的探索上海城区住区与绿地环境成蚊侵害状况,并分析其产生的公共卫生影响。方法选取上海中心城区不同住区与绿地环境类型设置8个CO2捕蚊机监测点,于2013年4-11月进行224 d连续性成蚊监测。结果住区与绿地环境的最优势蚊种分别为白纹伊蚊和淡色库蚊,密度差异显著,住区的白纹伊蚊密度及构成比均显著高于绿地环境[11.90 vs 2.18只/(d·机器),72.4%vs 18.9%,P值均<0.01)],绿地的淡色库蚊密度及构成比显著高于住区环境[8.28 vs 4.21只/(d·机器),73.9%vs 25.6%,P值均<0.01];趋势分析显示,住区环境的白纹伊蚊侵害最为显著[有13个旬的密度超过10只/(d·机器)],白天时段与傍晚时段住区环境成蚊密度亦均显著高于绿地环境(t=-6.493,P=0.000;t=-4.275,P=0.000)。结论住区与绿地环境蚊虫种群构成及侵害状况明显不同,造成的公共卫生影响亦有差别,在蚊虫防治措施的制定上需要因地制宜,有的放矢。
