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DOI	10.1007/s10533-020-00650-1
	Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake
	Barbosa P.M.; Melack J.M.; Amaral J.H.F.; MacIntyre S.; Kasper D.; Cortés A.; Farjalla V.F.; Forsberg B.R.
发表日期	2020
ISSN	0168-2563
起始页码	129
结束页码	151
卷号	148 期号:2
英文摘要	Large uncertainties in estimates of methane (CH4) emissions from tropical inland waters reflect the paucity of information at appropriate temporal and spatial scales. CH4 concentrations, diffusive and ebullitive fluxes, and environmental parameters in contrasting aquatic habitats of Lake Janauacá, an Amazon floodplain lake, measured for two years revealed patterns in temporal and spatial variability related to different aquatic habitats and environmental conditions. CH4 concentrations ranged from below detection to 96 µM, CH4 diffusive fluxes from below detection to 2342 µmol m−2 h−1, and CH4 ebullitive fluxes from 0 to 190 mmol m−2 d−1. Vegetated aquatic habitats had higher surface CH4 concentrations than open water habitats, and no significant differences in diffusive CH4 fluxes, likely due to higher k values measured in open water habitats. CH4 emissions were enhanced after a prolonged low water period, when the exposed sediments were colonized by herbaceous plants that decomposed after water levels rose, possibly fueling CH4 production. Statistical models indicated the importance of variables related to CH4 production (temperature, dissolved organic carbon) and consumption (dissolved nitrogen, oxygenated water column), as well as maximum depth, in controlling surface water CH4 concentrations. © 2020, Springer Nature Switzerland AG.
英文关键词	Amazon floodplain; Carbon cycle; CH4 emission; Wetlands
语种	英语
scopus关键词	carbon cycle; concentration (composition); diffusion; emission; environmental factor; estimation method; floodplain; herb; inland sea; lake water; methane; spatiotemporal analysis; uncertainty analysis
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153161
作者单位	Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil; Earth Research Institute, University of California, Santa Barbara, CA, United States; Coordenação de Dinâmica Ambiental, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil; Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
推荐引用方式 GB/T 7714	Barbosa P.M.,Melack J.M.,Amaral J.H.F.,et al. Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake[J],2020,148(2).
APA	Barbosa P.M..,Melack J.M..,Amaral J.H.F..,MacIntyre S..,Kasper D..,...&Forsberg B.R..(2020).Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake.Biogeochemistry,148(2).
MLA	Barbosa P.M.,et al."Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake".Biogeochemistry 148.2(2020).