Trees as methane sources: A case study of West Siberian South taiga

5th International field symposium "West Siberian Peatlands and Carbon Cycle: Past and Present" and the International conference "Carbon Balance of Western Siberian Mires in the Context of Climate Change"

Churkina, A.I.^1,2 ; Mochenov, S Yu^1 ; Sabrekov, S.F.^2,3 ; Glagolev, M.V.^1,2,3,4 ; Il'Yasov, D.V.^2,4 ; Terentieva, I.E.^5 ; Maksyutov, S.S.^5

Faculty of Soil Science, Moscow State University, 1 Leninskie gory, Moscow

119991, Russia^1

Water Problems Institute of RAS, 3 Gubkina, Moscow

119991, Russia^2

UNESCO Department 'Environmental Dynamics and Global Climate Changes', Yugra State University, Khanty-Mansiysk

628012, Russia^3

Institute of Forest Science Russian Academy of Sciences, Moscow Region, Russia^4

Center for Global Environmental Research, National Institute for Environmental Studies, Nishi Odori Street, Tsukuba

305-8506, Japan^5

关键词: Active zone;    Forested bog;    Ground area;    Methane emissions;    Methane fluxes;    Per unit;    Trunk diameters;    Western siberia;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/138/1/012002/pdf
DOI  :  10.1088/1755-1315/138/1/012002

来源: IOP

【 摘 要 】

Within this study, we were measuring methane emission from the tree trunks, leaves and branches in the seasonally flooded forest and in the forested bogs (pine-shrub-sphagnum ecosystems or "ryams") in south taiga zone of Western Siberia. Our results suggest that the tree trunks may act as a methane conductor from the soil to the atmosphere bypassing the methanotrophically active zones of soil. The tree methane flux depends on a trunk diameter and an ecosystem type. The average methane emission from tree trunks was 0.0061±0.0003 mg CH4•m-2•h-1per unit of ground area. The methane emission from branches and leaves was zero.