Effects of heavy metals stress on chicken manures composting via the perspective of microbial community feedback. (1st February 2022)

• Record Type: Journal Article
• Authors: Chen, Xiaomeng; Du, Zhuang; Guo, Tong; Wu, Junqiu; Wang, Bo; Wei, Zimin; Jia, Liming; Kang, Kejia
• Is Part Of: Environmental pollution. Volume 294(2022)
• Publication Date: 2022-02-01
• Subjects: Chicken manures composting -- Heavy metals stress -- Bacterial community -- Response strategies -- Environmental implications; L low concentration stress treatment -- M medium concentration stress treatment -- H high concentration stress treatment -- F1 acid-soluble fraction -- F2 reducible fraction -- F3 oxidizable fraction -- F4 residual fraction -- OM organic matters -- RDA redundancy analysis -- VPA variance partitioning analysis -- SEMs structural equation models -- CuF1 F1 fraction of Cu -- CK-L treatment week stress treatment -- M-H treatment intense stress treatment -- Zi intra module connectivity -- Pi inter module connectivity -- avgCC average clustering coefficient -- GD average path distance -- M1 heavy metals loving bacteria -- M2 heavy metals resistant bacteria -- M3 weak resistant bacteria with poor competitiveness -- M4 sensitive bacteria -- M5 potential bacteria -- M6 highly adaptable bacteria -- M7 inert bacteria; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2021.118624
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Heavy metal pollution was the main risk during livestock manures composting, in which microorganisms played a vital role. However, response strategies of microbial community to heavy metals stress (HMS) remained largely unclear. Therefore, the objective of this study was to reveal the ecological adaptation and counter-effect of bacterial community under HMS during chicken manures composting, and evaluating environmental implications of HMS on composting. The degradation of organic matters (more than 6.4%) and carbohydrate (more than 19.8%) were enhanced under intense HMS, suggesting that microorganisms could quickly adapt to the HMS to ensure smooth composting. Meanwhile, HMS increased keystone nodes and strengthened significant positive correlation relationships between genera ( p < 0.05), indicating that bacteria resisted HMS through cooperating during composting. In addition, different bacterial groups performed various functions to cope with HMS. Specific bacterial groups responded to HMS, and certain groups regulated bacterial networks. Therefore, bacterial community had the extraordinary potential to deal with HMS and guarantee chicken manures composting even in the presence of high concentrations of heavy metals. Graphical abstract: Image 1 Highlights: Composting microorganisms could quickly adapt to heavy metals stress. Microorganisms coped with heavy metals stress through cooperating. Different bacterial groups performed various functions to cope with metals stress. Chicken manures composting could be guaranteed even under intense metals stress.