Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13633 |
Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands | |
Martins, Paula Dalcin1; Hoyt, David W.2; Bansal, Sheel3; Mills, Christopher T.4; Tfaily, Malak2; Tangen, Brian A.3; Finocchiaro, Raymond G.3; Johnston, Michael D.5; McAdams, Brandon C.5; Solensky, Matthew J.3; Smith, Garrett J.1; Chin, Yu-Ping5; Wilkins, Michael J.1,5 | |
2017-08-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Inland waters are increasingly recognized as critical sites of methane emissions to the atmosphere, but the biogeochemical reactions driving such fluxes are less well understood. The Prairie Pothole Region (PPR) of North America is one of the largest wetland complexes in the world, containing millions of small, shallow wetlands. The sediment pore waters of PPR wetlands contain some of the highest concentrations of dissolved organic carbon (DOC) and sulfur species ever recorded in terrestrial aquatic environments. Using a suite of geochemical and microbiological analyses, we measured the impact of sedimentary carbon and sulfur transformations in these wetlands on methane fluxes to the atmosphere. This research represents the first study of coupled geochemistry and microbiology within the PPR and demonstrates how the conversion of abundant labile DOC pools into methane results in some of the highest fluxes of this greenhouse gas to the atmosphere ever reported. Abundant DOC and sulfate additionally supported some of the highest sulfate reduction rates ever measured in terrestrial aquatic environments, which we infer to account for a large fraction of carbon mineralization in this system. Methane accumulations in zones of active sulfate reduction may be due to either the transport of free methane gas from deeper locations or the co-occurrence of methanogenesis and sulfate reduction. If both respiratory processes are concurrent, any competitive inhibition of methanogenesis by sulfater-educing bacteria may be lessened by the presence of large labile DOC pools that yield noncompetitive substrates such as methanol. Our results reveal some of the underlying mechanisms that make PPR wetlands biogeochemical hotspots, which ultimately leads to their critical, but poorly recognized role in regional greenhouse gas emissions. |
英文关键词 | 16S rRNA gene sequencing carbon and sulfur cycling methane emissions sediments sulfate reduction rates wetlands |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404863300014 |
WOS关键词 | SP NOV. ; BOREAL LAKES ; METHYLOTROPHIC METHANOGEN ; EMENDED DESCRIPTION ; HYDROGEN-SULFIDE ; GENOME SEQUENCE ; ORGANIC-MATTER ; EMISSIONS ; SEDIMENTS ; OXIDATION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17150 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Ohio State Univ, Microbiol Dept, Columbus, OH 43210 USA; 2.Environm Mol Sci Lab, Richland, WA 99350 USA; 3.US Geol Survey, Northern Prairie Wildlife Res Ctr, Jamestown, ND 58401 USA; 4.US Geol Survey, Crustal Geophys & Geochem Sci Ctr, Denver Fed Ctr, Bldg 20, Denver, CO 80225 USA; 5.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA |
推荐引用方式 GB/T 7714 | Martins, Paula Dalcin,Hoyt, David W.,Bansal, Sheel,et al. Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands[J]. GLOBAL CHANGE BIOLOGY,2017,23(8). |
APA | Martins, Paula Dalcin.,Hoyt, David W..,Bansal, Sheel.,Mills, Christopher T..,Tfaily, Malak.,...&Wilkins, Michael J..(2017).Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands.GLOBAL CHANGE BIOLOGY,23(8). |
MLA | Martins, Paula Dalcin,et al."Abundant carbon substrates drive extremely high sulfate reduction rates and methane fluxes in Prairie Pothole Wetlands".GLOBAL CHANGE BIOLOGY 23.8(2017). |
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