Microbially-driven sulfur cycling microbial communities in different mangrove sediments

被引：59

作者：

Li, Mingyue ^{[1
]}

Fang, Anqi ^{[1
]}

Yu, Xiaoli ^{[1
]}

Zhang, Keke ^{[1
]}

He, Zhili ^{[1
,2
]}

Wang, Cheng ^{[1
]}

Peng, Yisheng ^{[1
]}

Xiao, Fanshu ^{[1
]}

Yang, Tony ^{[1
]}

Zhang, Wei ^{[1
]}

Zheng, Xiafei ^{[1
]}

Zhong, Qiuping ^{[1
]}

Liu, Xingyu ^{[1
]}

Yan, Qingyun ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Environm Microbi Res Ctr, Sch Environm Sci & Engn, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Guangzhou 510006, Peoples R China

[2] Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China

来源：

CHEMOSPHERE | 2021年 / 273卷

基金：

中国国家自然科学基金;

关键词：

Mangrove ecosystem; Sulfur-oxidization; Sulfate-reduction; Functional gene; SIMULTANEOUS BIOLOGICAL REMOVAL; SONNERATIA-APETALA; SULFATE REDUCTION; OXIDIZING BACTERIA; SULFIDE OXIDATION; ORGANIC-MATTER; WASTE-WATER; CARBON; DIVERSITY; LAKE;

D O I：

10.1016/j.chemosphere.2020.128597

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microbially-driven sulfur cycling is a vital biogeochemical process in the sulfur-rich mangrove ecosystem. It is critical to evaluate the potential impact of sulfur transformation in mangrove ecosystems. To reveal the diversity, composition, and structure of sulfur-oxidizing bacteria (SOB) and sulfate-reducing bacteria (SRB) and underlying mechanisms, we analyzed the physicochemical properties and sediment microbial communities from an introduced mangrove species (Sonneratia apetala), a native mangrove species (Kandelia obovata) and the mudflat in Hanjiang River Estuary in Guangdong (23.27 degrees N, 116.52 degrees E), China. The results indicated that SOB was dominated by autotrophic Thiohalophilus and chemoautotrophy Chromatium in S. apetala and K. obovata, respectively, while Desulfatibacillum was the dominant genus of SRB in K. obovata sediments. Also, the redundancy analysis indicated that temperature, redox potential (ORP), and SO42- were the significant factors influencing the sulfur cycling microbial communities with elemental sulfur (ES) as the key factor driver for SOB and total carbon (TC) for SRB in mangrove sediments. Additionally, the morphological transformation of ES, acid volatile sulfide (AVS) and SO42- explained the variation of sulfur cycling microbial communities under sulfur-rich conditions, and we found mangrove species-specific dominant Thiohalobacter, Chromatium and Desulfatibacillum, which could well use ES and SO42-, thus promoting the sulfur cycling in mangrove sediments. Meanwhile, the change of nutrient substances (TN, TC) explained why SOB were more susceptible to environmental changes than SRB. Sulfate reducing bacteria produces sulfide in anoxic sediments at depth that then migrate upward, toward fewer reducing conditions, where it's oxidized by sulfur oxidizing bacteria. This study indicates the high ability of SOB and SRB in ES, SO42-,S-2(-) and S2- generation and transformation in sulfur-rich mangrove ecosystems, and provides novel insights into sulfur cycling in other wetland ecosystems from a microbial perspective. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：12

共 90 条

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