Succession of Aphanizomenon flos-aquae and Microcystis aeruginosa in direct co-culture experiments at different temperatures and biomasses

Cyanobacterial blooms have become a serious global environmental issue due to their potential risk for releasing detrimental secondary metabolites into aquatic ecosystems, posing a great threat to water quality management for public health authorities. Aphanizomenon , a common filamentous cyanobacte...

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Bibliographic Details
Published in:Journal of oceanology and limnology 2022-09, Vol.40 (5), p.1819-1828
Main Authors: Wen, Qianzhi, Xiao, Peng, Li, Hua, Li, Wenke, Yu, Gongliang, Li, Renhui
Format: Article
Language:English
Subjects:
Aquatic ecosystems
Biomass
Blooms
Cell culture
Cell size
Competitiveness
Earth and Environmental Science
Earth Sciences
Growth rate
Lakes
Metabolites
Microcystis
Oceanography
Public health
Quality management
Secondary metabolites
Strategic management
Temperature effects
Water quality
Water quality management
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Summary:Cyanobacterial blooms have become a serious global environmental issue due to their potential risk for releasing detrimental secondary metabolites into aquatic ecosystems, posing a great threat to water quality management for public health authorities. Aphanizomenon , a common filamentous cyanobacterial genus belonging to Nostocales, is under particular concern because its several members are able to form harmful blooms. Furthermore, succession of bloom between A. flos-aquae and Microcystis occurs in many natural lakes. To evaluate the competitiveness of A. flos-aquae vs. M. aeruginosa , two sets of experiments at different ratios of biomass at 15 °C and 25 °C were conducted. Results show that at 15 °C, the two species were able to coexist, and A. flos-aquae showed a specific higher growth rate, and its growth was promoted by the presence of M. aeruginosa . At 25 °C, the growth of A. flos-aquae was inhibited by the biomass of M. aeruginosa , and M. aeruginosa suppressed A. flos-aquae in competition. Additionally, the vegetative cell size of A. flos-aquae was significantly influenced by the co-culture with M. aeruginosa , whereas the filament length of A. flos-aquae was not significantly affected. This study confirms that temperature is the dominating factor on the succession of A. flos-aquae and M. aeruginosa of a different biomass.
ISSN:2096-5508
2523-3521
DOI:10.1007/s00343-022-2041-1