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引用本文:高亚,潘继征,李勇,何尚卫,吴晓东.江苏滆湖北部区整治后浮游植物时空分布及环境因子变化规律.湖泊科学,2015,27(4):649-656. DOI:10.18307/2015.0413
GAO Ya,PAN Jizheng,LI Yong,HE Shangwei,WANG Xiaodong.Spatio-temporal distribution of phytoplankton and environmental factors in the north part of Lake Gehu(Jiangsu) after muti-treatment. J. Lake Sci.2015,27(4):649-656. DOI:10.18307/2015.0413
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江苏滆湖北部区整治后浮游植物时空分布及环境因子变化规律
高亚1,2,3, 潘继征2, 李勇1,3, 何尚卫1,2,3, 吴晓东2,4
1.苏州科技学院环境科学与工程学院, 苏州 215009;2.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;3.江苏省环境科学与工程重点实验室, 苏州 215009;4.中国科学院大学, 北京 100049
摘要:
滆湖是我国长江中下游典型的浅水型湖泊,为了解其治理后浮游植物群落时空分布规律,2013年112月对其北部区浮游植物及环境因子进行调查.调查期间共检出浮游植物7门43属61种,春、冬季以栅藻(Scenedesmus)和小环藻(Cyclotella)为主要优势种属,夏、秋季以微囊藻(Microcystis)和颗粒直链藻(Melosira granulata)为主要优势种属,采样期间浮游植物生物量最高值为90.6mg/L,出现在8月份,铜绿微囊藻(Microcystis aeruginosa)占绝对优势.浮游植物平均密度呈现由西向东递减的趋势,植被覆盖区低于敞水区.环境因子分析表明:总氮浓度、总磷浓度、水温是影响滆湖北部区浮游植物密度和生物量的主要因子.比较相同月份湖区内部菱角芦苇区和未治理的敞水区的平均生物量,菱角区生物量较敞水区低约72.7%~91.1%,芦苇区生物量较敞水区低约63.9%~83.7%.在8、9月湖区内敞水区暴发水华时菱角区浮游植物生物量仅为敞水区的14.6%,芦苇区为敞水区的30.3%.
关键词:  滆湖  浮游植物  群落结构  时空分布  环境因子
DOI:10.18307/2015.0413
分类号:
基金项目:国家水体污染控制与治理科技重大专项(2012ZX07101-007)和江苏高校水处理技术与材料协同创新中心项目联合资助.
Spatio-temporal distribution of phytoplankton and environmental factors in the north part of Lake Gehu(Jiangsu) after muti-treatment
GAO Ya1,2,3, PAN Jizheng2, LI Yong1,3, HE Shangwei1,2,3, WANG Xiaodong2,4
1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, P.R.China;2.State Key Laboratory of Lake Science and Eenvironment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 210008, P.R.China;3.Key Laboratory of Environmental Science and Engineering of Jiangsu Province, Suzhou 215009, P.R.China;4.University of Chinese Academy of Sciences, Beijing 100049, P.R.China
Abstract:
Lake Gehu is a representative shallow lake located in the downstream of Yangtze River in China. To identify the phytoplankton community distribution after its treatment, a survey was conducted on the phytoplanktonic community and environmental factors in its north part from January to December in 2013. According to the survey, there were altogether seven phylum, fourty-three genus and sixty-one species of phytoplankton, mainly with Scenedesmus and Cyclotella in spring and winter, Microcystis and Melosira granulata in summer and autumn. The maximum phytoplankton biomass during sampling period was 90.6mg/L in August, mainly with Microcystis aeruginosa. The average density of phytoplankton showed a decreasing trend from west to east, with lower vegetation coverage in the open water area. The environmental factor analysis indicated that total nitrogen, total phosphorus and water temperature were key factors that influence the phytoplanktonic density and biomass in this area. Comparing with the average biomass in the water chestnut area and reed area with that in the untreated open water area in the same month, we found that the water chestnut area decreased with the range of 72.7%-91.1%, and 63.9%-83.7% in the reed area. In August and September when algal bloom occurred in the open water area, the biomass in the chestnut area and in the reed area was only 14.6% and 30.3% of that in the water area, respectively.
Key words:  Lake Gehu  phytoplankton  community structure  spatial and temporal distribution  environmental factors
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