Cyanobacterium Microcystis Bloom in a Eutrophicated Regulating Reservoir

Yoshinaga, Ikuo; Hitomi, Tadayoshi; Miura, Asa; Shiratani, Eisaku; Miyazaki, Tatsuo

doi:10.6090/jarq.40.283

Cited by 17 publications

(11 citation statements)

References 16 publications

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“…The RDA ordination diagram showed high values of WT, pH and Zeu/Zmix when dominated by M group, indicating its good adaptability to the water column stratification conditions in summer influenced by weak WLF. Many factors promote Microcystis dominance, including resource competition, light conditions, pH/CO 2 conditions, buoyancy, high-temperature tolerance, avoidance by herbivores, superior cellular nutrient storage, ammonium nitrogen exploitation, competition for trace elements and water exchange (Yoshinaga et al 2006). In this study, M. aeruginosa dominated when the temperature varied between 25.21 and 27.41°C.…”

Section: Discussionmentioning

confidence: 90%

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Wang

Cai

et al. 2010

Aquat Ecol

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In reservoirs, water level fluctuations strongly influence phytoplankton development. However, studies on the response of phytoplankton in the reservoir-bay to water level fluctuations are very scarce, especially in the highly dynamic reservoir system, for instance, the Three Gorges Reservoir (TGR) on the Yangtze River in China. Therefore, we carried out weekly monitoring in a typical tributary bay-Xiangxi Bay of the TGR from March 2008 to March 2009 analyze the dynamics of phytoplankton functional groups, as well as their response to the water level fluctuations and other environmental conditions. The phytoplankton functional groups G (short, nutrient-rich water columns with high light and without nutrient deficiency), M (dielly mixed layers of small eutrophic, low latitude with high insolation and without flushing and low total light) and Lo (summer epilimnia in mesotrophic lakes with segregated nutrients and without prolonged or deep mixing) were the most important in biomass, mainly represented by Pandorina morum and Eudorina elegans, Microcystis aeruginosa, Peridiniopsis niei and Ceratium hirundinella, respectively. The dominant functional groups had close relationships with the water level fluctuations, light and nutrient, etc. Principal components analysis and redundancy analysis indicated that phytoplankton functional groups in Xiangxi Bay were restricted by the mixing regime and other abiotic variables under the influences of the mixing regime. In Xiangxi Bay, the water level fluctuation showed significant correlations with many physicochemical variables, including the mixing depth (r = 0.97, p \ 0.001) and the relative water column stability (r = -0.80, p \ 0.001). The study implied that water level fluctuations had complex influence on environmental changes and selecting for phytoplankton functional groups in a highly dynamic reservoir-bay. The important characteristics of the dominant phytoplankton functional groups in Xiangxi Bay were also discussed.

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Section: Discussionmentioning

confidence: 90%

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Wang

Cai

et al. 2010

Aquat Ecol

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“…In addition, the growth of toxic cyanobacteria produces bad smell and scum, which prevents recreational use of water bodies, hampers the treatment of water for drinking and clogs irrigation pipes (Yoshinaga et al . ).…”

Section: Introductionmentioning

confidence: 97%

Occurrence of toxic cyanobacterial blooms for the first time in Lake Karaoun, Lebanon

Atoui¹,

Hafez

Slim

2012

Water & Environment J

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The increasing occurrence of cyanobacterial bloom in freshwaters worldwide is of great importance because of public health risks. In addition, they are very likely to have negative impact on ecological and economic aspects. In this study, the seasonal succession of phytoplankton population in Lake Karaoun in Lebanon was monitored from May 2009 to June 2011. The physicochemical parameters of lake water were then monitored for 1 year, from June 2010 until June 2011, to correlate the physicochemical parameters with the phytoplankton population in the lake. Our results showed, for the first time in Lebanon, that the eutrophied Lake Karaoun has been under the invasion of toxic cyanobacterial blooms since May 2009. The cyanobacterial bloom was persistent from late spring (May) until late fall (December) for 2 consecutive years. The high water temperature in the summer season is the main factor that has been affecting the growth of the cyanobacteria. The most frequently encountered bloom‐forming species were Microcystis aeruginosa and Aphanizomenon ovalisporum, which were either present individually or coexistent. The obtained results showed that during the period of cyanobacterial bloom, a deterioration of water quality defined by low levels of dissolved oxygen, total dissolved solids, and electric conductivity was reported. During cyanobacterial bloom period, the concentration of the orthophosphate–P (PO4‐P) was very minimal. The measured high value of chlorophyll‐a concentration during cyanobacterial bloom period (48.6 μg/L) was attributed to high photosynthetic activity. Cyanobacterial blooms can cause a variety of water‐quality problems in Lake Karaoun in addition to human health risk.

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“…The Microcystis-dominated cyanobacterial blooms frequently occur in shallow lakes in tropical and subtropical regions with adequate nutrient supply, high temperature and high water stability usually associated with stratified conditions (Neilan et al, 1994;Sedmak and Kosi, 1998;Dokulil and Teubner, 2000;Xie et al, 2003;Yoshinaga et al, 2006;Xu Y. et al, 2008). Anabaena, which is another significant bloom-forming cyanobacterial genus, is well known for its ability to produce geosmin, a taste/odor (T/O) compound with earthy or moldy smell (Izaguirre et al, 1982;Hayes and Burch, 1989;Saadoun et al, 2001;Tsujimura and Okubo, 2003;Wang et al, 2005).…”

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confidence: 99%

Cyanobacterial population and harmful metabolites dynamics during a bloom in Yanghe Reservoir, North China

Yang

et al. 2010

Harmful Algae

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Cyanobacterium Microcystis Bloom in a Eutrophicated Regulating Reservoir

Cited by 17 publications

References 16 publications

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Occurrence of toxic cyanobacterial blooms for the first time in Lake Karaoun, Lebanon

Cyanobacterial population and harmful metabolites dynamics during a bloom in Yanghe Reservoir, North China

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