TY - JOUR
T1 - Investigation of microbial community structure in constructed mangrove microcosms receiving wastewater-borne polycyclic aromatic hydrocarbons (PAHs) and polybrominated diphenyl ethers (PBDEs)
AU - Wang, Ya Fen
AU - Wu, Yan
AU - Pi, Na
AU - Tam, Nora Fung Yee
N1 - Funding Information:
The work described in this paper was supported by the State Key Laboratory in Marine Pollution, City University of Hong Kong and the Grant from the Science, Technology and Innovation Committee of the Shenzhen Municipality, China .
PY - 2014/4
Y1 - 2014/4
N2 - The study aims to examine relationships between microbial community structure and mixed pollutants of polycyclic aromatic hydrocarbons (PAHs) and polybrominated diphenyl ethers (PBDEs) in constructed wetland microcosms, planted with Excoecaria agallocha or Kandelia obovata, two common mangrove plant species, and under two tidal regimes, everyday tidal (Te) and no tidal flooding (Tn). Results showed both microbial community structure and the retained amounts of pollutants were significantly determined by tidal regime, while the effect of plant species was small. Higher amounts of PAHs but lower amounts of PBDEs were always retained in sediments under Te than Tn regimes. Accordingly, temporal and vertical distributions of microbial community structure differed greatly between the two tidal regimes. Redundancy analysis further revealed significant correlation between a subgroup of the mixed PAHs and PBDEs with variation in microbial community structure. The findings will help to propose specific strategies to improve the bioremediation efficiency of constructed wetland.
AB - The study aims to examine relationships between microbial community structure and mixed pollutants of polycyclic aromatic hydrocarbons (PAHs) and polybrominated diphenyl ethers (PBDEs) in constructed wetland microcosms, planted with Excoecaria agallocha or Kandelia obovata, two common mangrove plant species, and under two tidal regimes, everyday tidal (Te) and no tidal flooding (Tn). Results showed both microbial community structure and the retained amounts of pollutants were significantly determined by tidal regime, while the effect of plant species was small. Higher amounts of PAHs but lower amounts of PBDEs were always retained in sediments under Te than Tn regimes. Accordingly, temporal and vertical distributions of microbial community structure differed greatly between the two tidal regimes. Redundancy analysis further revealed significant correlation between a subgroup of the mixed PAHs and PBDEs with variation in microbial community structure. The findings will help to propose specific strategies to improve the bioremediation efficiency of constructed wetland.
KW - Mangrove microcosms
KW - Microbial community structure
KW - PAHs and PBDEs
KW - Tidal regime
UR - http://www.scopus.com/inward/record.url?scp=84893447394&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2014.01.003
DO - 10.1016/j.envpol.2014.01.003
M3 - Article
C2 - 24487304
AN - SCOPUS:84893447394
SN - 0269-7491
VL - 187
SP - 136
EP - 144
JO - Environmental Pollution
JF - Environmental Pollution
ER -