TY - JOUR
T1 - Performance and bacterial community structure of a 10-years old constructed mangrove wetland
AU - Tian, Tingting
AU - Tam, Nora F.Y.
AU - Zan, Qijie
AU - Cheung, S. G.
AU - Shin, Paul K.S.
AU - Wong, Y. S.
AU - Zhang, Li
AU - Chen, Zhanghe
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/11/30
Y1 - 2017/11/30
N2 - Constructed mangrove wetland has been used for wastewater treatment but its long-term performance has not been reported. One-year monitoring of a 10-years old horizontal subsurface-flow constructed mangrove wetland consisting of three belts, two with mangrove plants and one without, revealed that the system maintained high and stable removal percentages of organic matter and nutrients, and planted belts performed better than unplanted control. Substrates in belts planted with Aegiceras corniculatum or Kandelia obovata had higher abundance of ammonifiers, nitrifiers and denitrifiers but lower total heterotrophic bacteria than unplanted substrate. Denaturing gradient gel electrophoresis showed that microbial diversity in planted substrate was significantly lower than that in unplanted one. The bacteria in substrates, irrespective to belts, were phylogenetically related to Proteobacteria (most dominant), Acidobacteria, Firmicutes, Nitrospirae, Gemmatimonadetes, Chloroflexi and Cyanobacteria. The steady performance of this 10-year old constructed mangrove wetland was affected by the abundance and diversity of bacterial community in substrate.
AB - Constructed mangrove wetland has been used for wastewater treatment but its long-term performance has not been reported. One-year monitoring of a 10-years old horizontal subsurface-flow constructed mangrove wetland consisting of three belts, two with mangrove plants and one without, revealed that the system maintained high and stable removal percentages of organic matter and nutrients, and planted belts performed better than unplanted control. Substrates in belts planted with Aegiceras corniculatum or Kandelia obovata had higher abundance of ammonifiers, nitrifiers and denitrifiers but lower total heterotrophic bacteria than unplanted substrate. Denaturing gradient gel electrophoresis showed that microbial diversity in planted substrate was significantly lower than that in unplanted one. The bacteria in substrates, irrespective to belts, were phylogenetically related to Proteobacteria (most dominant), Acidobacteria, Firmicutes, Nitrospirae, Gemmatimonadetes, Chloroflexi and Cyanobacteria. The steady performance of this 10-year old constructed mangrove wetland was affected by the abundance and diversity of bacterial community in substrate.
KW - Constructed wetlands
KW - DGGE
KW - Mangrove
KW - Microbial community
KW - Rhizosphere soil
UR - http://www.scopus.com/inward/record.url?scp=85023191213&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2017.07.005
DO - 10.1016/j.marpolbul.2017.07.005
M3 - Article
C2 - 28711288
AN - SCOPUS:85023191213
SN - 0025-326X
VL - 124
SP - 1096
EP - 1105
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 2
ER -