Spatial distribution and assembly processes of bacterial communities in riverine and coastal ecosystems of a rapidly urbanizing megacity in China

Liang，Hebin1; Huang，Jin1; Xia，Yu2; Yang，Ying3,4; Yu，Yang5,6; Zhou，Kai7; Lin，Lin1; Li，Xiaoyan1; Li，Bing1

2024-07-15

10.1016/j.scitotenv.2024.173298

Science of the Total Environment   影响因子和分区

0048-9697

1879-1026

Rapid urbanization has precipitated significant anthropogenic pollution (nutrients and pathogens) in urban rivers and their receiving systems, which consequentially disrupted the compositions and assembly of bacterial community within these ecosystems. However, there remains scarce information regarding the composition and assembly of both planktonic and benthic bacterial communities as well as pathogen distribution in such environments. In this study, full-length 16S rRNA gene sequencing was conducted to investigate the bacterial community composition, interactions, and assembly processes as well as the distribution of potential pathogens along a riverine-coastal continuum in Shenzhen megacity, China. The results indicated that both riverine and coastal bacterial communities were predominantly composed of Gammaproteobacteria (24.8 ± 12.6 %), Alphaproteobacteria (16.1 ± 9.8 %), and Bacteroidota (14.3 ± 8.6 %), while sedimentary bacterial communities exhibited significantly higher diversity compared to their planktonic counterparts. Bacterial community patterns exhibited significant divergences across different habitats, and a significant distance-decay relationship of bacterial community similarity was particularly observed within the urban river ecosystem. Moreover, the urban river ecosystem displayed a more complex bacterial co-occurrence network than the coastal ecosystem, and a low ratio of negative:positive cohesion suggested the inherent instability of these networks. Homogeneous selection and dispersal limitation emerged as the predominant influences on planktonic and sedimentary bacterial communities, respectively. Pathogenic genera such as Vibrio, Bacteroides, and Acinetobacter, known for their roles in foodborne diseases or wound infection, were also identified. Collectively, these findings provided critical insights into bacterial community dynamics and their implications for ecosystem management and pathogen risk control in riverine and coastal environments impacted by rapid urbanization.

Assembly process Bacterial community Full-length 16S rRNA gene sequencing Pathogen distribution Urbanization

SCI ; EI

英语

其他

20242116112408

Assembly ; Bacteria ; Genes ; Pathogens ; River pollution ; Rivers ; RNA ; Sedimentology

Water Pollution:453 ; Ecology and Ecosystems:454.3 ; Biological Materials and Tissue Engineering:461.2 ; Biology:461.9 ; Geology:481.1

ENVIRONMENT/ECOLOGY

2-s2.0-85193253867

Scopus

1.State Environmental Protection Key Laboratory of Microorganism Application and Risk Control,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,518055,China
2.School of Environmental Science and Engineering,College of Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Marine Sciences,Sun Yat-Sen University,Zhuhai,519082,China
4.Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai,519000,China
5.National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria,South China Agricultural University,Guangzhou,510642,China
6.Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation,South China Agricultural University,Guangzhou,510642,China
7.Shenzhen Institute of Respiratory Disease,Shenzhen People's Hospital (the First Affiliated Hospital,Southern University of Science and Technology; the Second Clinical Medical College,Jinan University),Shenzhen,518020,China

Liang，Hebin,Huang，Jin,Xia，Yu,et al. Spatial distribution and assembly processes of bacterial communities in riverine and coastal ecosystems of a rapidly urbanizing megacity in China[J]. Science of the Total Environment,2024,934.

Liang，Hebin.,Huang，Jin.,Xia，Yu.,Yang，Ying.,Yu，Yang.,...&Li，Bing.(2024).Spatial distribution and assembly processes of bacterial communities in riverine and coastal ecosystems of a rapidly urbanizing megacity in China.Science of the Total Environment,934.

Liang，Hebin,et al."Spatial distribution and assembly processes of bacterial communities in riverine and coastal ecosystems of a rapidly urbanizing megacity in China".Science of the Total Environment 934(2024).