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引用本文:张佳敏,高健,杨诚,张泽慧,潘超,廖明军,赵以军,王和云,杨雨慧.以鲢、鳙养殖为主的长江中下游武山湖浮游植物群落结构特征.湖泊科学,2020,32(6):1771-1783. DOI:10.18307/2020.0617
ZHANG Jiamin,GAO Jian,YANG Chen,ZHANG Zehui,PAN Chao,LIAO Mingjun,ZHAO Yijun,WANG Heyun,YANG Yuhui.Phytoplankton community structure of Lake Wushan stocked densely with planktivorous filter-feeding bighead and silver carp, middle and lower reaches of the Yangtze River. J. Lake Sci.2020,32(6):1771-1783. DOI:10.18307/2020.0617
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以鲢、鳙养殖为主的长江中下游武山湖浮游植物群落结构特征
张佳敏, 高健, 杨诚, 张泽慧, 潘超, 廖明军, 赵以军, 王和云, 杨雨慧
湖北工业大学河湖生态修复与藻类利用湖北省重点实验室, 土木建筑与环境学院, 武汉 430068
摘要:
武山湖是紧邻长江的通江型富营养化湖泊,是国家级湿地公园.为切实了解该湖在以鲢、鳙养殖为主的情况下浮游植物结构特征,于2017年9月-2018年8月对其浮游植物群落结构特征及水质开展了监测.监测结果表明武山湖水质全年处于轻度富营养到重度富营养水平之间;12次共采集浮游植物7门100种(属),浮游植物优势种共有23种,其中蓝藻门有9种,绿藻门有8种,硅藻门和隐藻门各有3种.夏季和秋季蓝藻门优势种最多且优势度高,冬季和春季绿藻门和硅藻门优势种多且优势度高.武山湖浮游植物每月优势度最大的种类主要有蓝藻门微囊藻和细小平裂藻、绿藻门小球藻以及硅藻门小环藻.浮游植物生物量峰值出现在6月,达34.77 mg/L;丰度峰值出现在7月,达341.46×106 cells/L.冗余分析(RDA)和线性相关分析均表明浮游植物丰度和生物量与总磷、温度和pH均呈显著正相关,且蓝藻门生物量和丰度以及优势属与总磷和温度均呈显著正相关.研究结果表明武山湖浮游植物丰度和生物量在夏季均很高,发生蓝藻水华的风险较大.相对于氮,磷是更重要的限制浮游植物生长的营养元素.
关键词:  武山湖  浮游植物  群落结构    
DOI:10.18307/2020.0617
分类号:
基金项目:国家自然科学基金项目(31500378,31670367)、国家重点基础研究项目(2016YFC0401702)、湖北省科技厅重大专项(2018ZYYD037)和湖北工业大学高层次人才科研启动金项目(337301)联合资助.
Phytoplankton community structure of Lake Wushan stocked densely with planktivorous filter-feeding bighead and silver carp, middle and lower reaches of the Yangtze River
ZHANG Jiamin, GAO Jian, YANG Chen, ZHANG Zehui, PAN Chao, LIAO Mingjun, ZHAO Yijun, WANG Heyun, YANG Yuhui
Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, School of Civil and Environment, Hubei University of Technology, Wuhan 430068, P. R. China
Abstract:
Lake Wushan is a highly eutrophic, shallow lake connected to the Yangtze River, and a national wetland park. In order to study phytoplankton structural characteristics in the lake stocked densely with silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis), we conducted a field survey on the phytoplankton community and lake trophic status from September 2017 to August 2018. Trophic status indices (TLI) showed the water quality was between mesotrophic and heavy eutrophic state. A total of 100 phytoplankton species (genera) belonging seven phyla were identified; twenty-three dominant species including nine species of Cyanophyta, eight species of Chlorophyta and both three species of Bacillariophyta and of Cryptophyta were observed. The dominant groups were Cyanophyta in summer and autumn, Chlorophyta and Cryptophyta in winter and spring. The phytoplankton size distribution had a trend biased toward miniaturization. Microcystis sp., Merismopedia tenuissima, Chlorella chlorophylla, Chlorella sp., and Cyclotella sp. were the predominant species in our 2017-2018 annual survey. The peak biomass appeared in June, reaching 34.77 mg/L, and the peak abundance appeared in July, reaching 341.46×106 cells/L. Both of redundancy analyses and linear correlation analyses showed that total phosphorus, temperature and pH were positively correlated with phytoplankton abundance and biomass, and total phosphorus and temperature were also positively correlated with the biomass and abundance of Cyanophyta and the dominant genus. Our results showed that the abundance and biomass of phytoplankton were high, indicating high risks of cyanobacterial water blooms in summer months. Nitrogen was at least as important as phosphorus in limiting phytoplankton production in Wuhan lakes.
Key words:  Lake Wushan  phytoplankton  community structure  bighead carp  silver carp
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