Multi-source ecological water replenishment reshapes microbial community assembly and network stability in a water-scarce river
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Le résumé fourni par la source
• EWR decreased microbial α diversity and presented β diversity heterogeneity. • Stochastic process dominated the microbial community assembly. • NH 4 + -N in water and pH in sediment governed ecological process changes. • Under the influence of EWR, the complexity of microbial networks supported stability. Ecological water replenishment (EWR) has been an essential strategy to alleviate water scarcity and restore ecological functions in degraded rivers. However, the ecological consequences of multi-source replenishment, particularly how diverse water inputs jointly reshape microbial communities, assembly processes and network stability, remain largely underexplored. Here, we investigated the Yongding River Basin, a representative water-scarce river system in northern China that receives inflows including natural surface runoff, inter-basin transfers from Yellow River and South-to-North Water Diversion Project (SNWD), and reclaimed municipal wastewater. Through integrated analysis of bacterioplankton and bacteriobenthos communities, we found a progressive decline in alpha diversity and significant shifts in beta diversity from upstream to downstream sections with increasing engineered inputs. Stochastic processes dominated the assembly of both bacterioplankton and bacteriobenthos, although their relative importance varied with replenishment source. Compared with natural runoff, the proportions of dispersal limitation and homogeneous selection for bacterioplankton decreased under Yellow River and mixed replenishment, whereas bacteriobenthos assembly exhibited little overall change. Network analysis further revealed that EWR reduced the resilience of bacterioplankton network but enhanced that of bacteriobenthos. Across the entire aquatic ecosystem, microbial network complexity was strongly and positively associated with ecological stability. More, community assembly process affected network stability not only directly but also indirectly through their regulation of microbial diversity. These findings advance the mechanistic understanding of how large-scale, multi-source EWR reshapes microbial ecology and network structure, providing valuable insights for optimizing water input allocation, enhancing the functional recovery of aquatic microbial ecosystems, and supporting the sustainable management of water resources.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Multi-source ecological water replenishment reshapes microbial community assembly and network stability in a water-scarce river
- Date Crossref
- 01/12/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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State Key Joint Laboratory of Environment Simulation and Pollution Control pays non établi dans la noticeStructure de recherche
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Tsinghua University Center for Ecological Civilization pays non établi dans la noticeUniversité ou école supérieure
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Guilin University of Technology pays non établi dans la noticeUniversité ou école supérieure
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China Agricultural University pays non établi dans la noticeUniversité ou école supérieure
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School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control pays non établi dans la noticeUniversité ou école supérieure
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College of Environmental Science and Engineering pays non établi dans la noticeUniversité ou école supérieure
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College of Resources and Environmental Sciences Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation pays non établi dans la noticeUniversité ou école supérieure
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Yongding River Investment Co. pays non établi dans la noticeOrganisation à but non lucratif
State Key Joint Laboratory of Environment Simulation and Pollution Control, Center for Ecological Civilization — Tsinghua University et Guilin University of Technology, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.