An integrated insight into the response of sedimentary microbial communities to heavy metal contamination
- Central South University, Changsha (China). School of Minerals Processing and Bioengineering; Ministry of Education, Changsha (China). Key laboratory of Biometallurgy; DOE/OSTI
- Central South University, Changsha (China). School of Minerals Processing and Bioengineering; Ministry of Education, Changsha (China). Key laboratory of Biometallurgy
- Hunan Agricultural University, Changsha (China). College of Food Science and Technology
- Ministry of Agriculture, Beijing (China). Key Laboratory of Microbial Resources Collection and Preservation; Chinese Academy of Agricultural Sciences, Beijing (China). Institute of Agricultural Resources and Regional Planning
- Key Laboratory of Plant Nutrition and Fertilizer, Beijing (China); Chinese Academy of Agricultural Sciences, Beijing (China). Institute of Agricultural Resources and Regional Planning
- University of Oklahoma, Norman (United States). Institute for Environmental Genomics and Department of Botany and Microbiology
- Tsinghua University, Beijing (China). School of Environment; University of Oklahoma, Norman (United States). Institute for Environmental Genomics and Department of Botany and Microbiology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division
Response of biological communities to environmental stresses is a critical issue in ecology, but how microbial communities shift across heavy metal gradients remain unclear. To explore the microbial response to heavy metal contamination (e.g., Cr, Mn, Zn), the composition, structure and functional potential of sedimentary microbial community were investigated by sequencing of 16S rRNA gene amplicons and a functional gene microarray. Analysis of 16S rRNA sequences revealed that the composition and structure of sedimentary microbial communities changed significantly across a gradient of heavy metal contamination and the relative abundances were higher for Firmicutes, Chloroflexi and Crenarchaeota, but lower for Proteobacteria and Actinobacteria in highly contaminated samples. Also, molecular ecological network analysis of sequencing data indicated that their possible interactions might be enhanced in highly contaminated communities. Correspondently, key functional genes involved in metal homeostasis (e.g., chrR, metC, merB), carbon metabolism and organic remediation showed a higher abundance in highly contaminated samples, indicating that bacterial communities in contaminated areas may modulate their energy consumption and organic remediation ability. This study indicated that the sedimentary indigenous microbial community may shift the composition and structure as well as function priority and interaction network to increase their adaptability and/or resistance to environmental contamination.
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1624797
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 5; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Short-term warming increased soil heterotrophic respiration due to enhanced active microbial community
Structure, mineralogy, and microbial diversity of geothermal spring microbialites associated with a deep oil drilling in Romania
Atmospheric cloud water contains a diverse bacterial community
Journal Article
·
Tue Aug 05 20:00:00 EDT 2025
· Plant and Soil
·
OSTI ID:2586868
Structure, mineralogy, and microbial diversity of geothermal spring microbialites associated with a deep oil drilling in Romania
Journal Article
·
Sun Mar 29 20:00:00 EDT 2015
· Frontiers in Microbiology
·
OSTI ID:1260667
Atmospheric cloud water contains a diverse bacterial community
Journal Article
·
Wed Jun 15 00:00:00 EDT 2011
· Atmospheric Environment, 45(30):5399-5405
·
OSTI ID:1126381