In:
New Phytologist, Wiley, Vol. 238, No. 2 ( 2023-04), p. 584-597
Abstract:
Trees are known to be atmospheric methane (CH 4 ) emitters. Little is known about seasonal dynamics of tree CH 4 fluxes and relationships to environmental conditions. That prevents the correct estimation of net annual tree and forest CH 4 exchange. We aimed to explore the contribution of stem emissions to forest CH 4 exchange. We determined seasonal CH 4 fluxes of mature European beech ( Fagus sylvatica ) stems and adjacent soil in a typical temperate beech forest of the White Carpathians with high spatial heterogeneity in soil moisture. The beech stems were net annual CH 4 sources, whereas the soil was a net CH 4 sink. High CH 4 emitters showed clear seasonality in their stem CH 4 emissions that followed stem CO 2 efflux. Elevated CH 4 fluxes were detected during the vegetation season. Observed high spatial variability in stem CH 4 emissions was neither explicably by soil CH 4 exchange nor by CH 4 concentrations, water content, or temperature studied in soil profiles near each measured tree. The stem CH 4 emissions offset the soil CH 4 uptake by up to 46.5% and on average by 13% on stand level. In Central Europe, widely grown beech contributes markedly to seasonal dynamics of ecosystem CH 4 exchange. Its contribution should be included into forest greenhouse gas flux inventories.
Type of Medium:
Online Resource
ISSN:
0028-646X
,
1469-8137
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
208885-X
detail.hit.zdb_id:
1472194-6