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引用本文:吴洁,钱天鸣,虞左明.西湖叶绿素a周年动态变化及藻类增长潜力试验.湖泊科学,2001,13(2):143-148. DOI:10.18307/20010207
WU Jie,QIAN Tianming,YU Zuoming.The Annual Fluctuation of Chlorophyll-a and the Algal Growth Potential Test in West Lake, Hangzhou. J. Lake Sci.2001,13(2):143-148. DOI:10.18307/20010207
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西湖叶绿素a周年动态变化及藻类增长潜力试验
吴洁1, 钱天鸣1, 虞左明2
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
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41.16- 191.26mg/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2.08mg/L,总磷年均值为0.121mg/L,N:P大于17,水体中磷对藻类增长的促进作用比氮更为明显
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
DOI:10.18307/20010207
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The Annual Fluctuation of Chlorophyll-a and the Algal Growth Potential Test in West Lake, Hangzhou
WU Jie1, QIAN Tianming1, YU Zuoming2
1.Hangzhou Environmental Monitoring Center, Hangzhou 310007, P. R. China;2.Environmental Protection Institute of Hangzhou, Hangzhou 310005, P. R. China
Abstract:
The annual fluctuation of chlo rophyll-a concent rations and some chemical indicators were measured in the main areas of West Lake, Hangzhou during January-December 1999.The algal grow th potential test in water from West Lake were made.The relations between the chlo rophylla concent rations and various ecolog ical factors were discussed.The experimental results are as follows.The concent rations of chlorophyll-a in main Lake-areas appear in the same level.The range was 41.16-191.26mg/m3 and the annual average concent ration was 99.98mg/m3.The concentrations of chlo rophyll-a showed marked seasonal variation the highest in summer and early autumn and the low est in winter.The concent ration of chlorophyll-a has close relation with water temperature and TP.The West Lake is a typical Cyanophyta-pat tern lake in which the annual average concent rations of TN and TP were 2.08mg/L and 0.121mg/L respect ively.The ratio of TN to TP is more than 17 in West Lake, indicating TP's domination in the stimulation of algal growth.
Key words:  West Lake(Hangzhou)  Chlorophyll-a  algal  ecological facto rs  annual fluctuation  algal growth potential test
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