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Updated: Jan 31, 2026

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
Published on: February 25, 2021
[Dynamic Changes of Nitrogen-Transforming and Phosphorus-Accumulating Bacteria Along with the Formation of
Yu-Ke Peng1, Jun-Ling Lu1, Hui-Ping Chen1
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Abstract:
In order to reveal the dynamic changes of nitrogen-transforming and phosphorus-accumulating bacteria in the process of cyanobacterial bloom formation, bacterial community structure and functional genes associated with nitrogen cycling were analyzed using high-throughput sequencing and real-time quantitative PCR (qPCR). The high-throughput sequencing results showed that the diversity of bacterial communities decreased during cyanobacterial blooms, and the lacustrine free-living and bloom-attached bacterial communities varied with increased bloom density. With increasing density of cyanobacteria, the relative abundance of Actinobacteria and Bacteroidetes decreased, whereas that of Firmicutes increased. Moreover, the growth of phosphate-accumulating organisms was increased in the phycosphere of cyanobacterial blooms, while that of nitrifiers was inhibited. Denitrifiers increased significantly under moderate blooms. The qPCR data also revealed that the abundance of nitrification and denitrification genes decreased or disappeared with the development of cyanobacterial blooms, indicating that the nitrogen transformation process might be inhibited, which showed a positive feedback of bacterial community to the development of Microcystis blooms by satisfying the needs of the nutrients budget.
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