| 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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| 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 |
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| 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 |
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| Vertical distribution of phytoplankton and physico-chemical characteristics in the lacustrine zone of Xin'anjiang Reservoir(Lake Qiandao) in subtropic China during summer stratification |
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WU Zhixu1, LIU Mingliang2, LAN Jia1, HE Jianbo2, YU Zuoming2
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1.Chun'an Environmental Monitoring Station, Hangzhou 311700, P. R. China;2.Institute of Environmental Protection Science, Hangzhou 310014, P. R. China
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| 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 |
