水生生物学报2026，Vol.50Issue(7)：78-89,12.DOI:10.3724/1000-3207.2026.2026.0004
乌梁素海黄苔暴发时期的微生物群落特征及互作机制
MICROBIAL COMMUNITY CHARACTERISTICS AND INTERACTION MECHANISMS DURING THE OUTBREAK OF HUANGTAI ALGAE IN ULANSUHAI LAKE
摘要
Abstract
As the largest shallow lake in the Yellow River basin,Ulansuhai Lake is characterized by periodic blooms of Huangtai algae,which have become a prominent indicator of ecosystem degradation.This study focused on the micro-bial community characteristics,functional mechanisms,and potential risks of Huangtai algae.Using metagenomic sequencing,co-occurrence network analysis and redundancy analysis(RDA),we systematically analyzed its species composition,functional characteristics,algae-bacteria interaction patterns,and environmental response mechanisms.The results showed that bacteria were the absolutely dominant group(accounting for more than 98%),with the core dominant phyla being Cyanobacteriota,Pseudomonadota,and Bacteroidota,while eukaryotic microalgae accounted for less than 1%.The community structure showed obvious successive changes:Cyanobacteriota accounted for 66.8%at the initial bloom stage(May);the relative abundances of Pseudomonadota and Bacteroidota increased significantly at the middle stage(July);and Planctomycetota became the dominant at the late stage(September).RDA showed that community structure was significantly correlated with environmental factors such as water temperature and nutrients(the first two axes explained 84.23%of the total variation).Functional annotation indicated that the biosynthesis of other secondary metabolites(ko01110)was significantly enriched,and the total contribution rate of Cyanobacteriota,Pseudomonadota,and Bacteroidota to functional characteristics reached 88.26%.Co-occurrence network analysis revealed that algae-bacteria interaction was the core driving mechanism for the continuous outbreak of Huangtai algae.The staged succession of functional modules and keystone nodes supported the whole life cycle of the algal community,with ko01110 as the key functional pathway throughout.Huangtai algae blooms also pose multiple potential risks to the aquatic ecosystem.This study clarifies the mechanism of Huangtai algae blooms from a microbiological perspective and provides a theoretical basis for the ecological control of filamentous algal aggregates in shallow eutrophic lakes.关键词
乌梁素海/黄苔暴发/宏基因组学/蓝藻/藻-菌互作Key words
Ulansuhai Lake/Outbreak of Huangtai algae/Metagenomics/Cyanobacteria/Bacteria-algae symbiosis分类
生物科学引用本文复制引用
丛龙辉,李国文,黎佳茜,赵戈,刘雪瑜,张娟娟,王志超..乌梁素海黄苔暴发时期的微生物群落特征及互作机制[J].水生生物学报,2026,50(7):78-89,12.基金项目
中央引导地方科技发展资金项目(2024ZY0123)资助[Supported by the Central Government Guided Local Science and Techno-logy Development Fund Project(2024ZY0123)] （2024ZY0123）
