Fluvial Dissolved Organic Matter Quality Modulates Microbial Nitrate Transformation: Enhanced Denitrification under Low Carbon-to-Nitrate Ratio
Hohai University · Ministry of Ecology and Environment · +6 more institutions
Abstract
Dissolved organic matter (DOM), particularly the molar ratio of dissolved organic carbon (DOC) to NO3– plays a crucial role in shaping fluvial microbial NO3– transformation processes. However, the underlying mechanisms involving microbial genes remain poorly unexplored. To address this gap, six sampling campaigns were conducted in the Qingshui River, northwest China. Samples from different temporal and spatial points were categorized into three groups based on DOC:NO3– values: low (L, 3.13). Surprisingly, despite stoichiometric models suggesting that low DOC:NO3– suppresses denitrification, our results showed the highest median abundances of denitrification genes in group L, followed by M and H. Isotope…
Citation impact
- FWCI
- 18.29
- Percentile
- 100%
- References
- 60
Authors
12- XZXiang Zhu
Hohai University, Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
- FYFei Yang
Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
- QPQingqing Pang
Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
- FPFuquan Peng
Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
- BXBin Xu
Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
Topics & keywords
- Denitrification
- Dissolved organic carbon
- Nitrate
- Organic matter
- Nitrogen cycle
- Nitrogen
- Total organic carbon
- Microbial population biology