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Water periods impact the structure and metabolic potential of the nitrogen-cycling microbial communities in rivers of arid and semi-arid regions.
Pang, Qingqing; Zhao, Guohua; Wang, Dan; Zhu, Xiang; Xie, Lei; Zuo, Dezhi; Wang, Longmian; Tian, Linfeng; Peng, Fuquan; Xu, Bin; He, Fei; Ding, Jing; Chu, Wenhai.
Afiliación
  • Pang Q; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; National Joint Research Center for Ecological Conservation and High Quality Development of the Yellow River Basin, Beijing 100012, PR China.
  • Zhao G; School of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, PR China.
  • Wang D; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
  • Zhu X; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
  • Xie L; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China.
  • Zuo D; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
  • Wang L; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; National Joint Research Center for Ecological Conservation and High Quality Development of the Yellow River Basin, Beijing 100012, PR China. Electronic address: wlmian@sina.com.
  • Tian L; Ecological Environment Monitoring Center of Ningxia Hui Autonomous Region, Yinchuan 750000, PR China; Environmental Monitoring Station of Shizuishan, Shizuishan 753000, PR China.
  • Peng F; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; National Joint Research Center for Ecological Conservation and High Quality Development of the Yellow River Basin, Beijing 100012, PR China.
  • Xu B; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China; National Joint Research Center for Ecological Conservation and High Quality Development of the Yellow River Basin, Beijing 100012, PR China.
  • He F; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China.
  • Ding J; Ecological Environment Monitoring Center of Ningxia Hui Autonomous Region, Yinchuan 750000, PR China.
  • Chu W; College of Environmental Science and Engineering, Tongji University, Shanghai 20082, PR China. Electronic address: 1world1water@tongji.edu.cn.
Water Res ; 267: 122472, 2024 Sep 17.
Article en En | MEDLINE | ID: mdl-39305525
ABSTRACT
This study examined the influence of water periods on river nitrogen cycling by analysing nitrogen functional genes and bacterial communities in the Qingshui River, an upstream tributary of the Yellow River in China. Nitrate nitrogen predominated as inorganic nitrogen during the low-flow seasons, whereas salinity was highest during the high-flow seasons. Overall, the functional gene abundance increased with decreasing water volume, and nitrogen concentrations were determined by various specific gene groups. The relative abundance of bacteria carrying these genes varied significantly across water periods. The abundance of Pseudomona, Hydrogenophaga (carrying narGHI and nirB genes), and Flavobacterium (carrying nirK, norBC, and nosZ genes) significantly increased during the low-flow seasons. Nitrogen transformation bacteria exhibited both symbiotic and mutualistic relationships. Microbial network nodes and sizes decreased with decreasing water volume, whereas modularity increased. Additionally, the water period affected the functional microbial community structure by influencing specific environmental factors. Among them, SO42- primarily determined the denitrification, dissimilatory nitrate reduction to ammonium, and assimilatory nitrate reduction to ammonium communities, whereas NO2--N and Mg2+ were the main driving factors for the nitrogen-fixing and nitrifying communities, respectively. These findings have substantial implications for better understanding the reduction in river nitrogen loads in arid and semi-arid regions during different water periods.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido