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Authors Fu, GP; Han, JY; Yu, TY; Huangshen, LK; Zhao, L
Author Full Name Fu, Guiping; Han, Jingyi; Yu, Tianyu; Huangshen, Linkun; Zhao, Lin
Title The structure of denitrifying microbial communities in constructed mangrove wetlands in response to fluctuating salinities
Source JOURNAL OF ENVIRONMENTAL MANAGEMENT
Language English
Document Type Article
Author Keywords Constructed wetland; Aerobic denitrifying bacteria; Heterotrophic nitrifying-aerobic denitrifying bacteria; Saline sewage
Keywords Plus WASTE-WATER; NITROGEN REMOVAL; HETEROTROPHIC NITRIFICATION; AEROBIC DENITRIFICATION; PHOSPHORUS REMOVAL; DISSOLVED-OXYGEN; ORGANIC-MATTER; SP NOV.; PERFORMANCE; BACTERIUM
Abstract In this study, the experimental vertical-flow constructed wetland (CW) systems planted with the salt-tolerant mangrove species Kandelia candel were established to investigate the influence of salinity fluctuations on the denitrification performance and denitrifying microbial community structure of the CWs. The high-throughput sequencing analysis showed that 10-13 genera aerobic microbes had been enriched in the upper layer of wetland matrix in the depth of 10-25 cm, with the relative abundance accounting for 19.1 +/- 7.9%. Although the ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) were inhibited significantly in the CW systems with salinity levels in the range of 0.9-1.8%, the aerobic denitrifying (AD) bacteria including Pseudomonas, Acinetobacter and Aeromonas, removed 99% of ammonia nitrogen from the influent by hetero-trophic nitrification (HN) functions, and conducted denitrification at the same time to remove 90% of the TN in the system, indicating that the wetland test system successfully enriched a variety of aerobic denitrifying bacterial communities under different salinity conditions. Not only the nitrogen removal efficiency but also the adaptability of the wetland system to salinity fluctuations had been improved by the enriched HN-AD bacteria. In addition, HN-AD bacterial communities can conduct both nitrification and denitrification in the middle and upper layers of the vertical flow wetland, hereby saving the reaction space of the constructed wetland and reducing the construction cost.
Author Address [Fu, Guiping; Han, Jingyi; Yu, Tianyu; Huangshen, Linkun; Zhao, Lin] Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen Key Lab Marine Bioresource & Ecoenvironm, Shenzhen 518060, Peoples R China
Reprint Address Fu, GP (reprint author), Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen Key Lab Marine Bioresource & Ecoenvironm, Shenzhen 518060, Peoples R China.
E-mail Address fugp@szu.edu.cn
Funding Agency and Grant Number Shenzhen Science and Technology Key Project [JSGG20171013091238230]
Funding Text This study was supported by Shenzhen Science and Technology Key Project (JSGG20171013091238230).
Times Cited 3
Total Times Cited Count (WoS, BCI, and CSCD) 3
Publisher ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publisher City LONDON
Publisher Address 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
ISSN 0301-4797
29-Character Source Abbreviation J ENVIRON MANAGE
ISO Source Abbreviation J. Environ. Manage.
Publication Date MAY 15
Year Published 2019
Volume 238
Beginning Page 1
Ending Page 9
Digital Object Identifier (DOI) 10.1016/j.jenvman.2019.02.029
Page Count 9
Web of Science Category Environmental Sciences
Subject Category Environmental Sciences & Ecology
Document Delivery Number HT1AM
Unique Article Identifier WOS:000464296400001
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