IOCAS-IR  > 海洋生物分类与系统演化实验室
The Study of Hydrogeochemical Environments and Microbial Communities along a Groundwater Salinity Gradient in the Pearl River Delta, China
Sang, Shilei1,4; Dai, Heng2,3; Hu, Bill X.1; Hao, Yanru1; Zhou, Tong5; Zhang, Jin1
2019-04-01
Source PublicationWATER
ISSN2073-4441
Volume11Issue:4Pages:18
Corresponding AuthorDai, Heng(heng.dai@jnu.edu.cn) ; Hu, Bill X.(Bill.x.hu@gmail.com)
AbstractThe salinization of groundwater is an issue in coastal areas because it causes the deterioration of freshwater resources, significantly impacting human livelihoods and ecosystems. This study integrated isotopic geochemical measurements with high-throughput sequencing of 16S rRNA gene amplicons to evaluate the source of groundwater salinity and the influence of hydrogeochemical variations on microbial communities under different salinity gradients in the Pearl River Delta of China. Results showed that the groundwater salinity in this area varied from fresh water in the inland area to brackish water, and then to saline water close to the southeast shoreline. The major ions (Na+, K+, Ca2+, Mg2+, Cl-, NO3-, SO42-, and HCO3-) and isotope analyses (H-2, H-3, O-18, and C-14) indicated that the groundwater in the confined aquifer was recharged by local precipitation and seawater. A further C-14 analysis showed that the salinity of the groundwater was likely attributed to the Holocene transgression. Analysis of the microbial community showed that -proteobacteria were frequently observed in all the groundwater samples, while the other main microbial community at class level varied greatly, from -proteobacteria in the freshwater wells to epsilon-proteobacteria in the brackish wells and to Bacilli in the saline wells. Exiguobacterium and Acinetobacter were dominant in saline water and the brackish water sample of Q144, while Sulfuricurvum dominated in the brackish water sample of Q143. Aeromonas, no rank Gallionellaceae, no rank Methylophilaceae, Acidovorax, and Comamonas unevenly thrived in the freshwater samples collected from different locations. Therefore, the distribution of microbial communities reflected the salinity and hydrogeochemical characteristics of a groundwater aquifer, and can be regarded as a potential environmental indicator in the groundwater.
Keywordisotope geochemistry seawater intrusion environmental indicators 16S rDNA gene sequencing
DOI10.3390/w11040804
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology[2016YFC0402805] ; Western Light-western region leading scientists supporting project, Chinese Academy of Sciences[2018-XBYJRC-002] ; Regional collaborative innovation project for Xinjiang Uygur Autonomous Region (Shanghai cooperation organization science and technology partnership project)[2017E01029] ; National Natural Science Foundation of China[41807182] ; National Natural Science Foundation of China[U1603343] ; National Natural Science Foundation of China[41601595] ; GuangzhouWater Technology Project[400117017]
WOS Research AreaWater Resources
WOS SubjectWater Resources
WOS IDWOS:000473105700174
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/161996
Collection海洋生物分类与系统演化实验室
Corresponding AuthorDai, Heng; Hu, Bill X.
Affiliation1.Jinan Univ, Inst Groundwater & Earth Sci, Guangzhou 510632, Guangdong, Peoples R China
2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China
3.Chinese Acad Sci, Cele Natl Stn Observat & Res Desert Grassland Eco, Xinjiang Inst Ecol & Geog, Cele 848300, Peoples R China
4.Jinan Univ, Dept Ecol, Guangzhou 510632, Guangdong, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny, Qingdao 266071, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Sang, Shilei,Dai, Heng,Hu, Bill X.,et al. The Study of Hydrogeochemical Environments and Microbial Communities along a Groundwater Salinity Gradient in the Pearl River Delta, China[J]. WATER,2019,11(4):18.
APA Sang, Shilei,Dai, Heng,Hu, Bill X.,Hao, Yanru,Zhou, Tong,&Zhang, Jin.(2019).The Study of Hydrogeochemical Environments and Microbial Communities along a Groundwater Salinity Gradient in the Pearl River Delta, China.WATER,11(4),18.
MLA Sang, Shilei,et al."The Study of Hydrogeochemical Environments and Microbial Communities along a Groundwater Salinity Gradient in the Pearl River Delta, China".WATER 11.4(2019):18.
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