生态环境学报Issue(5)：838-844,7.DOI:10.16258/j.cnki.1674-5906.2015.05.018
枯水期鄱阳湖及其滨湖水体氮磷等污染物分布与藻华风险研究
Study on Distribution of N and P Pollutants and Risk of Cyanobacteria Bloom in Poyang Lake and Waters around the Lake during Drought Periods
摘要
Abstract
The water quality and phytoplankton in Poyang Lake and waters around the lake, which including fiver major rivers in Jiangxi, were investigated during drought periods were investigated. Data were analyzed systematically with principal component analysis and Pearson's correlation. The results demonstrated that nutrient content such as TN and TP in the water was high in both Poyang Lake and waters around it. Average TP in Poyang Lake and five major rivers reached 0.22 and 0.12 mg·L-1 respectively. TN and TP in the south region of Poyang Lake was higher than in the north due to mainly polluted inflow from Ganjiang River and Rao River. Average TP in the south region was 0.29 mg·L-1 and was only 0.14 mg·L-1 in the north. The results of principal component analysis demonstrated that water quality in the lakes was mainly affected by TP, TN, temperature and pH. And water quality of inflowing rivers was mainly affected by TN, NH3-N, temperature, pH and water clarity. The water quality of Zhelin Lake was the finest of all the lakes and it has the function of purifying the water of Xiu River water before it went into Poyang Lake. Water quality in small rivers was much better than the five major rivers especially the heavily polluted Ganjiang River and Rao River. Cyannobacteria bloom broke out in both Aixi Lake in Nanchang and Poyang Lake during the dry season, and the dominant species in the bloom of Poyang Lake was Microcystis. The microcystins concentration in the blooming waters of Poyang Lake reached 1.60μg·L-1, including MC-RR (92.6%), MC-LR (5.2%), MC-YR (0.4%) and other mirocystin variant (1.4%), indicating a relatively low cyanobacterial toxin risk. The high temperature of autumn, high TN and COD content were probably the main cause of the cyanobacteria bloom.关键词
鄱阳湖/滨湖水体/水污染/蓝藻水华/蓝藻毒素Key words
Poyang Lake/waters around Poyang Lake/water quality/cyanobacteria bloom/microcystin分类
资源环境引用本文复制引用
戴国飞,张伟,彭宁彦,楼倩,钟家有..枯水期鄱阳湖及其滨湖水体氮磷等污染物分布与藻华风险研究[J].生态环境学报,2015,(5):838-844,7.基金项目
国家自然科学基金项目（31400405）；中国博士后科学基金面上资助项目（2014M561875）；江西省水利科技项目 （）
