Patterns of succession between bloom-forming cyanobacteria Aphanizomenon flos-aquae and Microcystis and related environmental factors in large, shallow Dianchi Lake, China

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• 作者：Yanlong Wu ; Lin Li ; Lingling Zheng ; Gongyuan Dai ; Haiyan Ma ; Kun Shan…
• 关键词：Cyanobacterial bloom ; Succession ; Microcystis ; Aphanizomenon flos ; aquae ; Dianchi Lake
• 刊名：Hydrobiologia
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：765
• 期：1
• 页码：1-13
• 全文大小：1,330 KB
• 参考文献：APHA, 1995. Standard Methods for the Examination of Water and Wastewater (19th edn). American Public Health Association, American Water Works Association, Water Environment Federation.
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• 作者单位：Yanlong Wu (1) (2)
  Lin Li (1)
  Lingling Zheng (1)
  Gongyuan Dai (3)
  Haiyan Ma (1)
  Kun Shan (1) (2)
  Huadong Wu (1)
  Qichao Zhou (1) (2)
  Lirong Song (1)
  
  1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, Hubei, People鈥檚 Republic of China
  2. University of Chinese Academy of Sciences, Beijing, 100049, People鈥檚 Republic of China
  3. Yichang Maritime Safety Administration, Yichang, 443008, Hubei, People鈥檚 Republic of China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Hydrobiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5117

文摘

The succession amongst different cyanobacteria genera remains understudied and poorly understood as much of the focus has been on mono-specific blooms. The spring鈥搒ummer succession between Aphanizomenon flos-aquae and Microcystis and its underlying mechanism were investigated from 2009 to 2012 in hypereutrophic Dianchi Lake in China. Regularly, A. flos-aquae grows rapidly and forms bloom in March at water temperatures around 15掳C, followed by Microcystis blooming around 18掳C in April. Since 2010, the pattern of succession has changed, featuring an increase of Microcystis but decrease of A. flos-aquae biovolume, leading to near disappearance of A. flos-aquae in 2012. Coincidently, there was a sharp increase of nitrogen concentration in 2010, going up to 5.67 mg/l in 2011, and a big increase in the mass ratio of TN to TP from 13.6 in 2009 to 21.1 in 2011. We hypothesized that temperature is the most influential factor governing the initiation of rapid growth and succession between A. flos-aquae and Microcystis, while increase of TN and/or ratio of TN to TP may trigger the decline and disappearance of A. flos-aquae, time of recruitment, and the population dynamics of Microcystis. Our findings are not only meaningful to the understanding of the cyanobacterial bloom mechanism but also to the management of shallow eutrophic lakes. Keywords Cyanobacterial bloom Succession Microcystis Aphanizomenon flos-aquae Dianchi Lake