Effects of plant species on soil microbial processes and CH4 emission from constructed wetlands.

Yanhua Wang, Hao Yang, Chun Ye, Xia Chen, Biao Xie, Changchun Huang, Jixiang Zhang, Meina Xu

School of Geography Science, Nanjing Normal University, 1 Wenyuan Road, Qixia, Nanjing 210046, PR China. wangyanhua@njnu.edu.cn

Environmental pollution (Barking, Essex : 1987) 2013 Mar

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Methane (CH(4)) emission from constructed wetland has raised environmental concern. This study evaluated the influence of mono and polyculture constructed wetland and seasonal variation on CH(4) fluxes. Methane emission data showed large temporal variation ranging from 0 to 249.29 mg CH(4) m(-2) h(-1). Results indicated that the highest CH(4) flux was obtained in the polyculture system, planted with Phragmites australis, Zizania latifolia and Typha latifolia, reflecting polyculture system could stimulate CH(4) emission. FISH analysis showed the higher amount of methanotrophs in the profile of Z. latifolia in both mono and polyculture systems. The highest methanogens amount and relatively lower methanotrophs amount in the profile of polyculture system were obtained. The results support the characteristics of CH(4) fluxes. The polyculture constructed wetland has the higher potential of global warming. Copyright © 2012 Elsevier Ltd. All rights reserved.

Citation

Yanhua Wang, Hao Yang, Chun Ye, Xia Chen, Biao Xie, Changchun Huang, Jixiang Zhang, Meina Xu. Effects of plant species on soil microbial processes and CH4 emission from constructed wetlands. Environmental pollution (Barking, Essex : 1987). 2013 Mar;174:273-8