Changes of the denitrifying communities in a multi-stage free water surface constructed wetland
Jing Li, Jun-Tao Wang, Hang-Wei Hu, Zhang-Jie Cai, Yin-Ru Lei, Wei Li, Man-Yin Zhang, Zong-Ming Li, Yi-Nuo Zhu, Li-Juan Cui
Science of the Total Environment | Elsevier | Published : 2019
Microorganisms play crucial roles in the nitrogen removal processes of wetlands. However, the key functional genes and microbes related to the nitrogen removal remain largely unknown in the free water surface constructed wetland (FWS CW). Here we studied the abundances of denitrifiers by targeting the key functional genes (nirS, nirK and nosZ) and investigated the community compositions of denitrifiers and their correlations with the abiotic variables in a FWS CW. The increase of nosZ/(nirS + nirK) and nirS/nirK ratios in the outlet indicated a shift of denitrifiers' communities which tended to release less nitrous oxide at the genetic potential level. The denitrifiers dominated the bacteria..View full abstract
Awarded by National Key R&D Program of China
Awarded by National Natural Science Foundation of China
This work was funded by National Key R&D Program of China (2017YFC0506200) and National Natural Science Foundation of China (41601577). We are grateful for proofread by Dr. Phillip Chalk.