Affiliation:
1. Key Laboratory of Aquatic-Ecology and Aquaculture of Tianjin, Department of Fisheries Sciences, Tianjin Agricultural University, Tianjin 300384, China
Abstract
Abstract
To further understand the role of attached bacteria in the formation of Microcystis colonies, we conducted a field investigation in Chentaizi River in Tianjin, China, which frequently suffers Microcystis blooms in summer. The results showed the average cell density of Microcystis was 2.31 × 107 cell/L from July 19 to July 27, 2021. Free-living and attached bacteria communities shared similar phylum diversity, but the abundance changed obviously. The colony size of Microcystis and attached bacterial number in the colony showed an increasing trend during the whole sampling period. There was a significant positive correlation between Microcystis colonial size and attached bacterial density (P < 0.01), indicating attached bacteria could contribute the colony formation of Microcystis. The genus composition in attached bacterial community varied in colonies of different sizes. The relative abundance of Acinetobacter, Cloacibacterium, Sphingobacterium, and Ralstonia in >90 μm colonies were significantly higher than those in 8–20 μm and 20–90 μm colonies (P < 0.05). These genera might have positive effects on the colony formation of Microcystis during sampling.
Funder
National Natural Science Foundation of China
the Fundamental Research Funds of Tianjin Universities
Gansu Science and Technology Project for People's Livelihood
Special Project for Science and Technology Development of Local (Tianjin) under the Guidance of the Central Government
Freshwater Aquaculture Industrial Technology Research System Innovation Team of Tianjin
Subject
Water Science and Technology,Environmental Engineering
Cited by
3 articles.
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