Differential microbiome features in lake–river systems of Taihu basin in response to water flow disturbance

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: Sept. 30, 2024

Introduction In riverine ecosystems, dynamic interplay between hydrological conditions, such as flow rate, water level, and rainfall, significantly shape the structure function of bacterial microeukaryotic communities, with consequences for biogeochemical cycles ecological stability. Lake Taihu, one China’s largest freshwater lakes, frequently experiences cyanobacterial blooms primarily driven by nutrient over-enrichment changes, posing severe threats to quality, aquatic life, surrounding human populations. This study explored how varying disturbances influence microbial diversity community assembly within interconnected river–lake systems East South Taihu (ET&ST). The Taipu River in ET region accounts nearly one-third Taihu’s outflow, while ST includes Changdougang Xiaomeigang rivers, which act inflow rivers. These two rivers not only channel into but can also cause backflow lake creating distinct subjected different intensities disturbances. Methods Utilizing high-throughput sequencing, we selected 22 sampling sites river-lake conducted seasonally assessments dynamics. We then compared differences diversity, assembly, co-occurrence networks regions under regimes. Results discussion demonstrated that intensity temperature influenced structure, niches, coexistence eukaryotic microbes. region, where were stronger, richness increased, phylogenetic relationships closer, yet variations greater than experienced milder Additionally, migration dispersal rates microbes along impact limitations, higher region. High notably reduced niche width overlap, decreasing complexity stability networks. Moreover, path analysis indicated communities exhibited a stronger response communities. Our findings underscore critical need consider effects disturbance on when developing strategies manage protect particularly efforts control Taihu.

Language: Английский

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Similar but different assembly processes of bacterial and micro-eukaryotic communities in an urban river

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 26, 2025

Bacteria and micro-eukaryotes play important roles in river ecological systems. The processes that govern bacterial micro-eukaryotic communities urban rivers are still uncertain. spatiotemporal characteristics assembly of the Xiangjianghe River were explored using 16 S 18 rRNA gene amplicon sequencing present study. results indicate community composition exhibited distinct temporal spatial variation. topological co-occurrence networks demonstrate coexistence patterns vary significantly between four seasons. Water temperature (WT) oxidation-reduction potential (ORP) detected as most critical factors affecting structure. stochastic process (dispersal limitation) was dominant for bacteria all Deterministic influenced differently. Compared to bacteria, values niche breadth relatively lower, proportion deterministic higher micro-eukaryotes. These expand our understanding patterns, mechanisms, influencing rivers.

Language: Английский

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Geographical and Environmental Factors Differentially Shape Planktonic Microbial Community Assembly and Resistomes Composition in Urban Rivers

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

ABSTRACT Global urbanization accelerates pollution challenges in urban rivers, including increased transmission of bacterial antibiotic resistance genes (ARGs), severely threatening the health aquatic ecosystems and human health. Yet, systematic knowledge differences distribution community assembly patterns across rivers at a continental scale is still insufficient. In this study, we conducted extensive sampling nine representative China. We used amplicon shotgun metagenomic sequencing, state‐of‐the‐art bioinformatics, multivariate statistics to investigate mechanisms planktonic microbiomes (i.e., bacterioplankton microeukaryotes), their resistomes, i.e., ARGs metal (MRGs). Geographical environmental factors played pivotal role shaping vs. resistomes studied rivers. Phylogenetic‐bin‐based null model analysis (iCAMP) indicated that microbiomes, dominated by dispersal limitation drift, tend toward spatial heterogeneity. contrast, driven deterministic processes, display more similar patterns. Cross‐validated Mantel tests revealed geographical geographic distance) were primary regulators microbial assembly, while temperature) control processes resistomes. Our findings provide crucial insights into driving biogeographical entities scale, offering valuable implications for mitigating managing spread from environment humans.

Language: Английский

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Seasonal Dynamics of Eukaryotic Microbial Communities in the Water-Receiving Reservoir of the Long-Distance Water Diversion Project, China

Microorganisms, Journal Year: 2024, Volume and Issue: 12(9), P. 1873 - 1873

Published: Sept. 11, 2024

Inter-basin water transfer projects, such as the Yellow River to Qingdao Water Diversion Project (YQWD), are essential for addressing scarcity, but impact local aquatic ecosystems. This study investigates seasonal characteristics of eukaryotic microbial communities in Jihongtan Reservoir, main water-receiving body YQWD, over a one-year period using 18S rDNA amplicon sequencing. The results showed that diversity did not exhibit significant variation (

Language: Английский

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Spatiotemporal Distributions of Bacterioplankton Communities in the Qiantang River (Hangzhou Section), China

Journal of Ocean University of China, Journal Year: 2024, Volume and Issue: 23(4), P. 1102 - 1114

Published: July 2, 2024

Language: Английский

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