西湖叶绿素a周年动态变化及藻类增长潜力试验  

The Annual Fluctuation of Chlorophyll-a and the Algal Growth Potential Test in West Lake, Hangzhou

作　　者：吴洁[1] 钱天鸣[1] 虞左明[2] 

机构地区：[1]杭州市环境监测中心站,杭州310007 [2]杭州市环境保护研究所,杭州310005

出　　处：《湖泊科学》2001年第2期143-148,共6页Journal of Lake Sciences

摘　　要：通过 1999年 1- 12月对杭州西湖主要湖区叶绿素a含量及水质理化指标的逐月测定 ,分析了西湖主要湖区叶绿素a含量周年动态变化特征及各种环境生态因子对叶绿素a的影响 ,并对湖水进行了藻类增长潜力试验 .研究结果表明 ,西湖主要湖区叶绿素a含量总体保持在同一水平 ,年变化在 4 1.16 - 191.2 6mg/m3之间 ,年均值为 99.98mg/m3.叶绿素a含量有明显的季节变化特征 ,夏季和初秋为高峰 ,冬季最低 .水体总磷浓度与叶绿素a年周期动态变化一致 ,叶绿素a含量的季节变化与水温变化呈显著正相关 .西湖为典型的蓝藻型湖泊 ,总氮年均值为 2 .0 8mg/L ,总磷年均值为 0 .12 1mg/L ,N∶P大于 17。The annual fluctuation of chlorophyll a concentrations and some chemical indicators were measured in the main areas of West Lake, Hangzhou during January December 1999. The algal growth potential test in water from West Lake were made. The relations between the chlorophyll a concentrations and various ecological factors were discussed. The experimental results are as follows. The concentrations of chlorophyll a in main Lake areas appear in the same level. The range was 41.16-191.26mg/m 3 and the annual average concentration was 99.98mg/m 3. The concentrations of chlorophyll a showed marked seasonal variation the highest in summer and early autumn and the lowest in winter. The concentration of chlorophyll a has close relation with water temperature and TP. The West Lake is a typical Cyanophyta pattern lake in which the annual average concentrations of TN and TP were 2.08mg/L and 0.121mg/L respectively. The ratio of TN to TP is more than 17 in West Lake, indicating TP's domination in the stimulation of algal growth.

关 键 词：西湖 叶绿素A 藻类 生态因子 周年动态变化 藻类增长潜力试验 磷 氮 

分 类 号：X173[环境科学与工程—环境科学]