title: Microbial abundance and community in subsurface flow constructed wetland microcosms: role of plant presence.
abstract: In this research, the role of plants in improving microorganism growth conditions in subsurface flow constructed wetland (CW) microcosms was determined. In particular, microbial abundance and community were investigated during summer and winter in Phragmites australis-planted CW microcosms (PA) and unplanted CW microcosms (control, CT). Results revealed that the removal efficiencies of pollutants and microbial community structure varied in winter with variable microbial abundance. During summer, PA comprised more dominant phyla (e.g., Proteobacteria, Actinobacteria, and Bacteroidetes), whereas CT contained more Cyanobacteria and photosynthetic bacteria. During winter, the abundance of Proteobacteria was >40 % in PA but dramatically decreased in CT. Moreover, Cyanobacteria and photosynthetic bacterial dominance in CT decreased. In both seasons, bacteria were more abundant in root surfaces than in sand. Plant presence positively affected microbial abundance and community. The potential removal ability of CT, in which Cyanobacteria and photosynthetic bacteria were abundant during summer, was more significantly affected by temperature reduction than that of PA with plant presence.
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Environmental Research Institute, Shandong University, Jinan, 250100, China.
authors.forename: Huijun
authors.initials: H
authors.lastname: Xie
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, Ultimo, NSW, 2007, Australia.
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, Ultimo, NSW, 2007, Australia.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China. zhangjian00@sdu.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Mathematics and Statistics, Texas Tech University, Broadway and Boston, Lubbock, TX, 79409-1042, USA.
authors.forename: Cui
authors.initials: C
authors.lastname: Liu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liang
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Zhongchen
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Congcong
authors.initials: C
authors.lastname: Zhao
mesh_terms: D000458:Cyanobacteria / Q000254:growth & development*; D059013:Microbial Consortia; D006109:Poaceae / Q000254:growth & development*; D020560:Proteobacteria / Q000254:growth & development*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D014874:Water Pollutants, Chemical
keywords: Constructed wetland; Microbial abundance; Microbial community; Summer; Winter