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引用本文:吴志旭,刘明亮,兰佳,何剑波,虞左明.新安江水库(千岛湖)湖泊区夏季热分层期间垂向理化及浮游植物特征.湖泊科学,2012,24(3):460-465. DOI:10.18307/2012.0319
WU Zhixu,LIU Mingliang,LAN Jia,HE Jianbo,YU Zuoming.Vertical distribution of phytoplankton and physico-chemical characteristics in the lacustrine zone of Xin'anjiang Reservoir(Lake Qiandao) in subtropic China during summer stratification. J. Lake Sci.2012,24(3):460-465. DOI:10.18307/2012.0319
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新安江水库(千岛湖)湖泊区夏季热分层期间垂向理化及浮游植物特征
吴志旭1, 刘明亮2, 兰佳1, 何剑波2, 虞左明2
1.淳安县环境保护监测站, 杭州 311700;2.杭州市环境保护科学研究院, 杭州 310014
摘要:
2010年7月对亚热带特大型水库——新安江水库湖泊区水体的垂向物理、化学参数以及浮游植物群落进行了观测研究,并应用Water-PAM对水体浮游植物垂向光合作用参数进行了测定.研究结果表明:夏季该水库湖泊区在水下10~20 m处形成明显的温跃层,垂向pH值、溶解氧及浊度的变化同叶绿素a浓度呈现高度一致;夏季浮游植物群落以硅藻占绝对优势,水体表层以梅尼小环藻(Cyclotella meneghiniana)为主,表层以下其它各层均以巴豆叶脆杆藻(Fragilaria crotonensis)为绝对优势种,垂向分布表现为5~10 m区间为浮游植物高密度区域,温跃层以下浮游植物密度显著下降,水温分层可能是决定浮游植物垂向分布的重要因素之一.浮游植物最大光合效率从表层向下层逐步降低,实际光合效率最大值出现在垂向10 m区域.
关键词:  新安江水库(千岛湖)  浮游植物  垂向分布  Water-PAM  湖泊区
DOI:10.18307/2012.0319
分类号:
基金项目:杭州市科技局项目(20100834M42);杭州市环保局项目(201006);浙江省自然科学基金项目(Y5110314);国家水体污染控制与治理科技重大专项项目(2009ZX07528-003-04-02)联合资助
Vertical distribution of phytoplankton and physico-chemical characteristics in the lacustrine zone of Xin'anjiang Reservoir(Lake Qiandao) in subtropic China during summer stratification
WU Zhixu1, LIU Mingliang2, LAN Jia1, HE Jianbo2, YU Zuoming2
1.Chun'an Environmental Monitoring Station, Hangzhou 311700, P. R. China;2.Institute of Environmental Protection Science, Hangzhou 310014, P. R. China
Abstract:
The investigation on vertical distribution of phytoplankton and physical-chemical characteristics was conducted in the lacustrine zone during summer stratification in Xin'anjiang Reservoir(Lake Qiandao). The Water-PAM Chlorophyll Fluorometer was used to obtain vertical profiles of phytoplankton photosynthesis. The results showed that depth of thermocline appeared between 10-20 m. Besides, the vertical profiles of pH, dissolved oxygen and turbidity were in agreement with chlorophyll-a. In summer, the phytoplankton was dominated by Bacillariophyta, C. meneghiniana was dominant in surface layer, while F. crotonensis was absolutely dominant below the surface layer. High-density of phytoplankton was found around 5-10 m below the water surface. However, a sharp decline was observed for phytoplankton density below thermocline layer. Therefore, the thermal stratification might affect the vertical distribution of phytoplankton population. Phytoplankton maximum photosynthetic efficiency had a negative relationship with water depth and the actual maximum value of photosynthetic efficiency was determined at 10 m depth.
Key words:  Xin'anjiang Reservoir(Lake Qiandao)  phytoplankon  vertical distribution  Water-PAM  lacustrine zone
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