title: Effect of plant species compositions on performance of lab-scale constructed wetland through investigating photosynthesis and microbial communities.
abstract: This study focused on the effects of plant compositions on removal rates of pollutants in microcosms through investigating rhizosphere microbial populations, photosynthetic efficiency and growth characteristics. Mixed-culture groups improved the removal efficiency of TN and TP significantly but exhibited lower COD removal rates. Total plant biomasses were improved as the species richness increased, but the N/P content in the plants was mainly affected by the type of species. The mixed-culture groups showed lower photosynthesis rates and oxygen supply generated from roots under high irradiation. Microbial communities of the cultured groups in the rhizosphere exhibited significant differences. According to principal component analysis (PCA), the fungi were the typical microbes of SPA, SPAB, and SPABC, resulted in improvement in nutrient accumulation. These results demonstrated that a mixed culture strategy can represent the overyielding of biomass, promote the photo-protection mechanism, and will further increase the removal rates of pollutants in a constructed wetland.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
authors.forename: Shishu
authors.initials: S
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
authors.forename: Xiaochen
authors.initials: X
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China. Electronic address: stephen6949@hit.edu.cn.
authors.forename: Shih-Hsin
authors.initials: SH
authors.lastname: Ho
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
authors.forename: Jixian
authors.initials: J
authors.lastname: Yang
mesh_terms: D029023:Acorus / Q000502:physiology; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D002681:China; D031323:Iris Plant / Q000502:physiology; D059013:Microbial Consortia / Q000502:physiology*; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D010788:Photosynthesis / Q000502:physiology*; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D010944:Plants; D025341:Principal Component Analysis; D058441:Rhizosphere; D014865:Waste Disposal, Fluid / Q000379:methods*; D053833:Wetlands
chemical_list: D010758:Phosphorus; D009584:Nitrogen
keywords: Constructed wetland; Microbial communities; Photosynthesis; Plant species richness; Pollutant removal