Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium <italic style="font-style: italic">Microcystis</italic>

Qiang HE; Zhiming LIU; Ming LI

doi:0.1007/s00343-024-4096-7

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Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium Microcystis

Special Section: Scientific control of cyanobacterial blooms and their secondary hazards | Updated：2024-12-24

- Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium Microcystis
- Journal of Oceanology and Limnology Vol. 42, Issue 6, Pages: 1827-1838(2024)
- Affiliations：
  
  1.College of Natural Resources and Environment, Northwest A&F University, Yangling712100, China
  2.College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling712100, China
- Author bio：
  
  zmliu@nwafu.edu.cn
- Funds：
- DOI：0.1007/s00343-024-4096-7
  CLC：
- Received：25 March 2024，
  
  Published：01 November 2024
- Accepted：
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HE Qiang,LIU Zhiming,LI Ming.Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium Microcystis[J].Journal of Oceanology and Limnology,2024,42(06):1827-1838.
DOI：

HE Qiang,LIU Zhiming,LI Ming.Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium Microcystis[J].Journal of Oceanology and Limnology,2024,42(06):1827-1838. DOI： 0.1007/s00343-024-4096-7.

摘要

Abstract

Aeration induced turbulence was considered as an important measure to control the occurrence of cyanobacterial blooms in many lakes. Different aeration intensities were set for the culture of

Microcystis

aeruginosa

based on the formation of

Microcystis

colony at high iron conce

ntrations. The turbulent dissipation rate was calculated using a computational fluid dynamics (CFD) model to evaluate the intensity of turbulence. The effects of turbulence on the formation of

Microcystis

colony and the release of microcystin were analyzed. Results show that turbulence produced by aeration promoted the growth of

Microcystis

compared to that in stagnant water. Low intensity turbulence (4×10

-8

–1×10

-7

) promoted the formation of

Microcystis

colonies

but high intensity turbulence (1.28×10

-6

–1.8×10

-5

) did not. The increase in the number of cells per colony was slower than that in total biomass

indicating that the low intensity turbulence induced colony formation via cell division

while the high level turbulence disaggregated colonies formed by both cell division and cell adhesion. Low aeration intensity induced more production of reactive oxygen species (ROS) and malondialdehyde (MDA) in the cells of

Microcystis

than those in high aeration intensity. In addition

the content of microcystin (MC)-LR in the cells was positively correlated with turbulence intensity

showing that turbulence affected not only the growth and aggregation of

Microcystis

colonies but also their toxin production. These findings provide a better understanding of the cyanobacterial bloom formation mechanisms and help to propose feasible methods to prevent the formation of

Microcystis

colonies in a natural environment.

关键词

Keywords

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⁰

Effects of aeration induced turbulence on colonial morphology and microcystin release of the bloom-forming cyanoabcterium Microcystis

DOI：0.1007/s00343-024-4096-7

摘要

Abstract

关键词

Keywords

references