| 摘要: |
| 测定和分析湖北省21个浅水湖泊沿岸带底栖藻类的现存量, 底柄硅藻的种类组成、细胞密度、多样性指数及其群落结构特征, 并结合理化指标对水质状况进行评价.结果表明:调查期间, 不同湖泊底柄藻类的现存量和底柄硅藻细胞密度分别介于1.01-40.82μg/cm2和0.09×106-14.20×106cells/cm2之间, 它们在所研究的富营养化湖泊中的含量均相对较高.在发现的181种(变种)底柄硅藻中, 极细微曲壳藻分布广泛, 是中营养、中-富营养湖泊的绝对优势种或主要优势种之一.TWINSPAN和DCA分析结果显示这些湖泊样点被分成3组, 第一组中一富营养型湖泊的主要优势种是曲壳藻属的一些种类;第二组中营养湖泊同时存在分布相对均匀的多个优势种;第三组主要是城区富营养湖泊.南湖处于超富营养水平, 小形异极藻占绝对优势(相对丰富度为43%)。 |
| 关键词: 底柄藻类 群落结构 现存量 硅藻 优势种 沿岸带 长江中游 |
| DOI：10.18307/2011.0212 |
| 分类号: |
| 基金项目:国家自然科学基金项目(30970550)资助 |
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| Community structure characters of benthic algae community on littoral zone of the lakes in the middle reaches of Yangtze River |
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PEI Guofeng1, LIU Guoxiang2
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1.Laboratory of Microorganism and Biotransformation, South-Central University for Nationalities, Wuhan 430074, P.R.China;2.Institute of Hydrobioiogy, Chinese Academy of Sciences, Wuhan 430072, P.R.China
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| Abstract: |
| Species composition, cell density, Shannon-Weaver diversity index, community structures of benthic diatoms and standing crops of benthic algae were investigated in the littoral zone of 21 shallow lakes in Hubei Province, and the water quality was evaluated combined with chemical parameters.The standing crops(Chl.a) of benthic algae and the density of benthic diatoms, with the range of 1.01-40.82μg/cm2 and 0.09 ×l06-14.20×106cells/cm2, respectively, exhibited higher values in eutrophic lakes during the studying period.Among the 181 taxa (variety) of benthic diatom observed, Achnanthes minulissima distributed widely and was absolutely dominant or sub-dominant species in mesotrophic and meso-eutrophic lakes.The results of two-way indicator species analysis and detrended correspondence analysis catalogued these lakes into three groups:the dominant species were taxa of Achnanthes genus in meso-eutrophic lakes of the first group;several dominant species existed at the same time in mesotrophic lake of the second group;the third group were the city eutrophic lakes.Nanhu was hyper-eutrophic lake, Gomphonema parvulum was dominant indictor(43% of relative abundance). |
| Key words: Benthic algae community structure standing crops diatom dominant species littoral zone middle reaches of Yangtze River |
