Recruitment-promoting of dormant Microcystis aeruginosa by three benthic bacterial species

Harmful Algae
Wansheng ZouYuande Peng

Abstract

The frequent occurrence of Microcystis aeruginosa blooms benefit from the dormant Microcystis cells, which will be recruited from sediment into overlying water to form a dominant population and algal blooms when external environmental conditions are suitable. Previous studies have unveiled factors involved in M. aeruginosa recruitment and bloom initiation, including nutrition, illumination, temperature, and hydrodynamic force. In this study, three dominant benthic bacterial species isolated from Lake Chongtian with frequent blooms-forming were identified through next generation sequencing (NGS) techniques, and laboratory experiments were conducted on the recruitment of dormant M. aeruginosa cells via co-culture with these bacteria at 10 °C, 15 °C, 20 °C and 25 °C. The results showed that the bacterial strains in sediment proliferated quickly before recruitment of dormant M. aeruginosa cells, subsequently significantly promoted the recruitment of dormant M. aeruginosa via allelochemical (metabolite) production, lower N:P values and lower dissolved oxygen concentrations in the sediment-water interface, and enhanced photosynthesis of M. aeruginosa cells. Furthermore, dormant M. aeruginosa was recruited from sediment at 10 °C when ...Continue Reading

Citations

Dec 8, 2020·Frontiers in Microbiology·Hui JinZhong Hua Cai
Jun 23, 2021·The Science of the Total Environment·Mohammad Hassan RanjbarFernanda Helfer

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