气候变化领域集成服务门户(CCPortal): Microbial Methane From Methylphosphonate Isotopically Records Source

CCPortal

DOI	10.1029/2019GL085872
	Microbial Methane From Methylphosphonate Isotopically Records Source
	Taenzer L.; Carini P.C.; Masterson A.M.; Bourque B.; Gaube J.H.; Leavitt W.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	Methane is a potent greenhouse gas commonly supersaturated in the oxic surfaces waters of oceans and lakes, yet canonical microbial methanogens are obligate anaerobes. One proposed methane production pathway involves microbial degradation of methylphosphonate (MPn), which can proceed in the presence of oxygen. Directly tracing dissolved methane to its source in oxic waters, however, remains a challenge. To address this knowledge gap, we quantified the carbon isotopic fractionation between substrate MPn and product methane (1.3‰) in lab experiments, which was 1 to 2 orders of magnitude smaller than canonical pathways of microbial methanogenesis (20 to 100‰). Together, these results indicated that microbial catabolism of MPn is a source of methane in surface oceans and lake waters, but to differentiate sources of MPn in nature a further accounting of all sources is necessary. Methane from this pathway must be considered in constraining the marine carbon cycle and methane budget. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Biodegradation; Budget control; Carbon; Greenhouse gases; Isotopes; Lakes; Carbon isotopes; Isotopic fractionations; Marine carbon cycle; marine methane paradox; methylphosphonate; Microbial catabolisms; Microbial degradation; Surface ocean; Methane; carbon cycle; carbon isotope; catabolism; enzyme activity; greenhouse gas; isotopic fractionation; lake water; marine environment; methane; methanogenesis; microbial activity; oxic conditions; substrate
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170872
作者单位	Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; Now at Woods Hole Oceanographic Research Institution, Falmouth, MA, United States; Department of Environmental Science, University of Arizona, Tucson, AZ, United States; Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL, United States; Department of Biological Sciences, Dartmouth College, Hanover, NH, United States; Department of Chemistry, Dartmouth College, Hanover, NH, United States
推荐引用方式 GB/T 7714	Taenzer L.,Carini P.C.,Masterson A.M.,et al. Microbial Methane From Methylphosphonate Isotopically Records Source[J],2020,47(1).
APA	Taenzer L.,Carini P.C.,Masterson A.M.,Bourque B.,Gaube J.H.,&Leavitt W.D..(2020).Microbial Methane From Methylphosphonate Isotopically Records Source.Geophysical Research Letters,47(1).
MLA	Taenzer L.,et al."Microbial Methane From Methylphosphonate Isotopically Records Source".Geophysical Research Letters 47.1(2020).