Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments
Li, Yingdong1; Zheng, Liping2; Zhang, Yue2; Liu, Hongbin1; Jing, Hongmei2

Mangrove forests are widespread along the subtropical and tropical coasts. They provide a habitat for a wide variety of plants, animals and microorganisms, and act as a buffer zone between the ocean and land. Along with other coastal environments, mangrove ecosystems are under increasing pressure from human activities, such as excessive input of nutrients and toxic pollutants. Despite efforts to understand the diversity of microbes in mangrove sediments, their metabolic capability in pristine and contaminated mangrove sediments remains largely unknown. By using metagenomic approach, we investigated the metabolic capacity of microorganisms in contaminated (CMS) and pristine (PMS) mangrove sediments at subtropical and tropical coastal sites. When comparing the CMS with PMS, we found that the former had a reduced diazotroph abundance and nitrogen fixing capability, but an enhanced metabolism that is related to the generation of microbial greenhouse gases via increased methanogenesis and sulfate reduction. In addition, a high concentration of heavy metals (mainly Zn, Cd, and Pb) and abundance of metal/antibiotic resistance encoding genes were found in CMS. Together, these data provide evidence that contamination in mangrove sediment can markedly change microbial community and metabolism; however, no significant differences in gene distribution were found between the subtropical and tropical mangrove sediments. In summary, contamination in mangrove sediments might weaken the microbial metabolisms that enable the mangrove ecosystems to act as a buffer zone for terrestrial nutrients deposition, and induce bioremediation processes accompanied with an increase in greenhouse gas emission.

Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41776147] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06010202] ; Training Program of the Major Research Plan of the National Natural Science Foundation of China[91751116]
WOS KeywordTricarboxylic-acid Cycle ; Heavy-metal Contamination ; Autotrophic Co2 Fixation ; 16s Ribosomal-rna ; Dinitrogen Fixation ; Acetylene-reduction ; Single-cell ; Soil ; Bacteria ; Diversity
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000463482800078
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Document Type期刊论文
Corresponding AuthorLiu, Hongbin; Jing, Hongmei
Affiliation1.Hong Kong Univ Sci & Technol, Div Life Sci, Kowloon, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya, Peoples R China
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Li, Yingdong,Zheng, Liping,Zhang, Yue,et al. Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments[J]. SCIENTIFIC REPORTS,2019,9(1):11.
APA Li, Yingdong,Zheng, Liping,Zhang, Yue,Liu, Hongbin,&Jing, Hongmei.(2019).Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments.SCIENTIFIC REPORTS,9(1),11.
MLA Li, Yingdong,et al."Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments".SCIENTIFIC REPORTS 9.1(2019):11.
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