Collaborative Innovation Center for Intelligent Fishery, Higher Vocational College of Fujian Province, Xiamen Ocean Vocational College, Xiamen, China.
Xiamen Cloud Whale Ecological Environment Co., LTD, Xiamen, China.
PLoS One. 2024 Oct 25;19(10):e0312283. doi: 10.1371/journal.pone.0312283. eCollection 2024.
The tidal barrage at Wuyuan Bay effectively mitigated the odor from the tidal flat during ebb tide, however, its effect on bacterial community structure in waters are still unclear. In this study, high-throughput sequencing was used to analyze the structure of the microbial community in waters inside and outside the tidal barrage during flood and ebb tides. Results showed bacterial diversity was higher in water outside the barrage during flood tide. The dominated species at phylum and genus levels were various in waters inside and outside the tidal barrage during flood and ebb tides. The water inside during ebb tide (E1) were dominated by two cyanobacterial genera, Cyanobium_PCC-6307 (42.90%) and Synechococcus_CC9902 (12.56%). The microbial function, such as porphyrin and chlorophyll metabolism and photosynthesis, were increased in E1. Norank_f__Nitriliruptoraceae was identified as differential microorganism in waters inside the barrage. Inorganic nitrogen and nonionic ammonia were significantly high in E1, and were negatively correlated with norank_f__Nitriliruptoraceae. These results suggest tidal barrage blocks water exchange, resulting in the accumulation of nutrients in Wuyuan Bay. Consequently, the environment became favorable for the growth of cyanobacteria, leading to the dominance of algae in the water inside the barrage and posing the risk of cyanobacterial bloom. Higher Nitriliruptoraceae inside the barrage might be a cue for the change of water quality.
在落潮时，位于梧园湾的潮汐坝有效地减轻了潮滩的气味，但它对水域细菌群落结构的影响尚不清楚。本研究采用高通量测序技术分析了涨潮和落潮时潮汐坝内外水域的微生物群落结构。结果表明，涨潮时坝外水域的细菌多样性较高。在涨潮和落潮时，坝内外水域的优势种在门和属水平上各不相同。落潮时（E1）的坝内水域主要由两个蓝细菌属组成，分别为 Cyanobium_PCC-6307（42.90%）和 Synechococcus_CC9902（12.56%）。E1 中微生物功能如卟啉和叶绿素代谢以及光合作用增加。在坝内水域中鉴定出的差异微生物为 Norank_f__Nitriliruptoraceae。E1 中无机氮和非离子氨含量显著升高，与 Norank_f__Nitriliruptoraceae 呈负相关。这些结果表明，潮汐坝阻止了水交换，导致梧园湾的营养物质积累。因此，环境变得有利于蓝藻的生长，导致坝内水域藻类占优势，并存在蓝藻水华的风险。坝内较高的 Nitriliruptoraceae 可能是水质变化的一个线索。
