论文
论文标题: Succession of Aphanizomenon flos-aquae and Microcystis aeruginosa in direct co-culture experiments at different temperatures and biomasses
作者: Wen, Qianzhi; Xiao, Peng; Li, Hua; Li, Wenke; Yu, Gongliang; Li, Renhui
出版刊物: JOURNAL OF OCEANOLOGY AND LIMNOLOGY
出版日期: SEP
出版年份: 2022
卷/期:
DOI: 10.1007/s00343-022-2041-1
论文摘要: 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 degrees C and 25 degrees C were conducted. Results show that at 15 degrees 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 degrees 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.
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