| 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 |
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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[J].湖泊科学,2012,24(3):460-465. |
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| 作者姓名： | 吴志旭 刘明亮 兰佳 何剑波 虞左明 |
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| 作者单位： | 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 |
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| 基金项目： | 杭州市科技局项目，杭州市环保局项目，浙江省自然科学基金，国家水体污染控制与治理科技重大专项项目 |
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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 cro-tonensis)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.
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| 关 键 词： | 新安江水库(千岛湖) 浮游植物 垂向分布 Water-PAM 湖泊区 |
| 收稿时间： | 5/6/2011 12:00:00 AM |
| 修稿时间： | 2011/9/16 0:00:00 |
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 Zhixu,LIU Mingliang,LAN Ji,HE Jianbo and 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].Journal of Lake Science,2012,24(3):460-465. |
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| Authors: | WU Zhixu LIU Mingliang LAN Ji HE Jianbo and YU Zuoming |
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| Institution: | 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 10-20m.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 5-10m 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 10m depth. |
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| Keywords: | Xin’anjiang Reservoir(Lake Qiandao) phytoplankon vertical distribution Water-PAM lacustrine zone |
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