globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.05.017
Scopus记录号: 2-s2.0-85053276828
论文题名:
Morphospecies-dependent disaggregation of colonies of the cyanobacterium Microcystis under high turbulent mixing
作者: Li M.; Xiao M.; Zhang P.; Hamilton D.P.
刊名: Water research
ISSN: 18792448
出版年: 2018
卷: 141
起始页码: 340
结束页码: 348
语种: 英语
英文关键词: Artificial mixing ; Colony formation ; Kolmogorov scale ; Microcystis ; Morphospecies ; Turbulent dissipation rate
Scopus关键词: eutrophication ; Microcystis ; water pollutant ; Eutrophication ; Microcystis ; Water Pollutants
英文摘要: Preventing formation of large colonies and reducing colony size of the cyanobacterium Microcystis may lead to reductions in bloom formation. Here we investigated the effects of artificial mixing on morphology and disaggregation dynamics of Microcystis colonies in vivo, using a stirring device and a laser particle analyzer. The turbulent dissipation rate (ε) was varied from 0.020 to 0.364 m2 s-3. We hypothesized that colonies of M. aeruginosa and M. ichthyoblabe would be more susceptible to disaggregation from turbulent mixing than colonies of M. wesenbergii. Our results showed that colony size of M. aeruginosa and M. ichthyoblabe decreased with increased turbulence intensity and duration of stirring for ε > 0.094 m2 s-3, while M. wesenbergii showed less obvious changes in colony size with mixing. Spherical M. wesenbergii colonies exposed to high turbulence intensities for 30 min gradually transitioned to colony morphologies similar to M. ichthyoblabe and M. aeruginosa-like colonies (irregular, elongated or lobed, with distinct holes). Our results suggest that turbulent mixing is an important factor driving morphological changes of Microcystis colonies, and artificial mixing may effectively reduce colony size of Microcystis, thereby preventing bloom formation. Copyright © 2018 Elsevier Ltd. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112681
Appears in Collections:气候减缓与适应

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作者单位: College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, PR China; Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project, Nanyang Normal University, Nanyang, 473061, PR China; Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia; School of Environment, Griffith University, Nathan, QLD 4111, Australia; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, PR China; School of Civil Engineering, University of Queensland, St Lucia, QLD 4072, Australia; Australian Rivers Institute, Griffith University, NathanQLD 4111, Australia

Recommended Citation:
Li M.,Xiao M.,Zhang P.,et al. Morphospecies-dependent disaggregation of colonies of the cyanobacterium Microcystis under high turbulent mixing[J]. Water research,2018-01-01,141
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