Please use this identifier to cite or link to this item:
Title: High rates of methane oxidation in an Amazon floodplain lake
Authors: Barbosa, Pedro Maia
Farjalla, Vinícius Fortes
Melack, John M.
Amaral, João Henrique Fernandes
Silva, Jonismar S. da
Forsberg, Bruce Rider
Keywords: Annual Variation
Bottom Water
Carbon Isotope
Isotopic Fractionation
Water Surface
Water Level
Amazon Basin
Issue Date: 2018
metadata.dc.publisher.journal: Biogeochemistry
metadata.dc.relation.ispartof: Volume 137, Número 3, Pags. 351-365
Abstract: Methane (CH4) oxidation may consume large amounts of dissolved CH4 in lakes and wetlands. Here, we estimated CH4 oxidation rates in an Amazonian floodplain lake during periods representative of the annual variations in water level, using incubations and measurements of δ13C-CH4. A large fraction of the CH4 produced was oxidized (from 34 to ~ 100%, average = 80%), with volumetric CH4 oxidation rates ranging from 1 to 132 mg C m−3 d−1. Heavier values of δ13C-CH4 in surface waters when compared to bottom waters and sediment bubbles corroborates the high CH4 oxidation rates observed. The depth-integrated oxidation rates were of the same magnitude as the calculate CH4 evasion to the atmosphere, which indicates that methane oxidation is an important sink of CH4 and is likely to be important in the many similar lakes encountered in the Amazon River basin. © 2018, Springer International Publishing AG, part of Springer Nature.
metadata.dc.identifier.doi: 10.1007/s10533-018-0425-2
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.