摘要
分别利用内梅罗指数法和底栖动物完整性指数法评价2008～2012年太湖水质和水生生物健康状况．结果表明，太湖全湖水质受到污染，水生生物健康基本处于亚健康状态．水质评价和水生生物评价结果在较大的尺度上呈现相同的趋势：从全湖尺度上看，水质和水生生物评价都显示东太湖的水生态健康状况总体上好于太湖其他部分．从时间上看，2008～2012年太湖水质等级和水生生物健康状况均低于20世纪60年代的水平．两种评价结果在短时间尺度和某些点位间存在差异，这是由于：①两种评价方法关注的时间尺度有所差异；②水生生物健康不仅与水质有关，还与水体生境有关．有机污染物和过剩营养盐是影响太湖水质和水生生物健康状况的主要因素，因此降低太湖及其人湖河流中有机污染物和营养盐的浓度是改善太湖水质和水生态功能的有效方法．
Nemerow index method and benthic index of biological integrity method have been used to evaluate the water quality and the health status of aquatic organisms in Taihu Lake during 2008-2012, respectively. The results showed that the water in the whole Taihu Lake was polluted, and the aquatic organisms were basically kept in sub-health state. The results of the water quality and aquatic biological assessment exhibited generally the same trend at a large scale. In the view of the whole lake, the water quality and aquatic health status in East Taihu Lake were better than those of the other parts. In the view of time, the water quality and aquatic health status during 2008-2010 were worse than those of the lake in the 1960s. The results observed from the two assessment methods were not the same during short periods of time and in some special sample points, which were attributed to the following reasons： （1） the two assessment methods focused on different time scales and （2） the aquatic biological health status was related to the water quality as well as the environmental habitat. Since organic pollutants and excessive nutrients were the main factors influencing the water quality and aquatic health status, reducing the concentrations of the organic pollutants and inorganic nutrients should be a feasible method to improve the water quality and the ecological function of Taihu Lake.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2014年第1期271-278,共8页
Environmental Science
基金
国家水体污染控制与污染治理科技重大专项(2012ZX07506-004)
江苏省博士后基金项目(1202061C)
关键词
水质评价
水生生物健康评价
内梅罗指数法
底栖动物完整性指数法
太湖
water quality assessment
aquatic biological assessment
nemerow index method
benthic index of biological integrity method
Taihu Lake
