Methane emissions from tree stems: a new frontier in the global carbon cycle

Barba, Josep; Bradford, Mark A.; Brewer, Paul E.; Bruhn, Dan; Covey, Kristofer; van Haren, Joost; Megonigal, J. Patrick; Mikkelsen, Teis Nørgaard; Pangala, Sunitha R.; Pihlatie, Mari; Poulter, Ben; Rivas-Ubach, Albert; Schadt, Christopher Warren; Terazawa, Kazuhiko; Warner, Daniel L.; Zhang, Zhen; Vargas, Rodrigo

doi:10.1111/nph.15582

Title: Methane emissions from tree stems: a new frontier in the global carbon cycle

Journal Article · Mon Nov 05 00:00:00 EST 2018 · New Phytologist

DOI:https://doi.org/10.1111/nph.15582· OSTI ID:1484115

Barba, Josep ^[1]; Bradford, Mark A. ^[2]; Brewer, Paul E. ^[3]; Bruhn, Dan ^[4]; Covey, Kristofer ^[5]; van Haren, Joost ^[6]; Megonigal, J. Patrick ^[3]; Mikkelsen, Teis Nørgaard ^[7]; Pangala, Sunitha R. ^[8]; Pihlatie, Mari ^[9]; Poulter, Ben ^[10]; Rivas-Ubach, Albert ^[11];

^[12]; Terazawa, Kazuhiko ^[13]; Warner, Daniel L. ^[1]; Zhang, Zhen ^[14]; Vargas, Rodrigo ^[1]

Univ. of Delaware, Newark, DE (United States)
Yale Univ., New Haven, CT (United States)
Smithsonian Environmental Research Center, Edgewater, MD (United States)
Aalborg Univ. (Denmark)
Yale Univ., New Haven, CT (United States); Skidmore College, Saratoga Springs, NY (United States)
Univ. of Arizona, Tucson, AZ (United States)
Technical Univ. of Denmark (Denmark)
Lancaster Univ., Lancaster (United Kingdom)
Univ. of Helsinki (Finland)
NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Tokyo Univ. of Agriculture (Japan)
Univ. of Maryland, College Park, MD (United States)

Tree stems from wetland, floodplain and upland forests can emit CH4. This emerging field of research has revealed a high spatial and temporal variability on CH4 stem emissions between trees and species, and within and across ecosystems, which is not completely understood. Additionally, there is no consensus on the biophysical mechanisms that could support stem CH4 emissions, including the origin of these emissions. This hinders our understanding of spatial and temporal patterns and hamper the identification of biophysical drivers. Here, we summarize up to 30 opportunities and challenges on stem CH4 emissions research in order to improve estimates of magnitudes, patterns, drivers and trace the potential origin of CH4 emissions. We propose two main challenges: the need for long-term high frequency measurements of stem CH4 emissions, and the need for a mechanistic model including passive and active transport of CH4 from the soil-tree-atmosphere continuum. The first challenge would allow to constrain magnitudes and patterns of CH4 emissions at different temporal scales, and the second would require discovery and integration of pathways and mechanisms of CH4 production and emissions to be integrated into process-base models. Addressing these challenges might improve upscaling of CH4 emissions from trees to the ecosystem scale and the quantification of the role of stem CH4 emissions for the local-to-global CH4 budget.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC05-00OR22725; AC05-76RL01830

OSTI ID:: 1484115

Alternate ID(s):: OSTI ID: 1487299; OSTI ID: 1506688

Report Number(s):: PNNL-SA-137837

Journal Information:: New Phytologist, Vol. in press, Issue none; ISSN 0028-646X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 79 works

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Title: Methane emissions from tree stems: a new frontier in the global carbon cycle

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