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Trees are major conduits for methane egress from tropical forested wetlands

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Trees are major conduits for methane egress from tropical forested wetlands. / Pangala, Sunitha Rao; Moore, Sam; Hornibrook, Edward R. C. et al.
In: New Phytologist, Vol. 197, No. 2, 01.2013, p. 524-531.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Pangala, SR, Moore, S, Hornibrook, ERC & Gauci, V 2013, 'Trees are major conduits for methane egress from tropical forested wetlands', New Phytologist, vol. 197, no. 2, pp. 524-531. https://doi.org/10.1111/nph.12031

APA

Pangala, S. R., Moore, S., Hornibrook, E. R. C., & Gauci, V. (2013). Trees are major conduits for methane egress from tropical forested wetlands. New Phytologist, 197(2), 524-531. https://doi.org/10.1111/nph.12031

Vancouver

Pangala SR, Moore S, Hornibrook ERC, Gauci V. Trees are major conduits for methane egress from tropical forested wetlands. New Phytologist. 2013 Jan;197(2):524-531. Epub 2012 Dec 18. doi: 10.1111/nph.12031

Author

Pangala, Sunitha Rao ; Moore, Sam ; Hornibrook, Edward R. C. et al. / Trees are major conduits for methane egress from tropical forested wetlands. In: New Phytologist. 2013 ; Vol. 197, No. 2. pp. 524-531.

Bibtex

@article{f72c4e23ba8945c1848435891003eced,
title = "Trees are major conduits for methane egress from tropical forested wetlands",
abstract = "Wetlands are the largest source of methane to the atmosphere, with tropical wetlands comprising the most significant global wetland source component. The stems of some wetland-adapted tree species are known to facilitate egress of methane from anoxic soil, but current ground-based flux chamber methods for determining methane inventories in forested wetlands neglect this emission pathway, and consequently, the contribution of tree-mediated emissions to total ecosystem methane flux remains unknown. In this study, we quantify in situ methane emissions from tree stems, peatland surfaces (ponded hollows and hummocks) and root-aerating pneumatophores in a tropical forested peatland in Southeast Asia. We show that tree stems emit substantially more methane than peat surfaces, accounting for 62-87% of total ecosystem methane flux. Tree stem flux strength was controlled by the stem diameter, wood specific density and the amount of methane dissolved in pore water. Our findings highlight the need to integrate this emission pathway in both field studies and models if wetland methane fluxes are to be characterized accurately in global methane budgets, and the discrepancies that exist between field-based flux inventories and top-down estimates of methane emissions from tropical areas are to be reconciled.",
author = "Pangala, {Sunitha Rao} and Sam Moore and Hornibrook, {Edward R. C.} and Vincent Gauci",
year = "2013",
month = jan,
doi = "10.1111/nph.12031",
language = "English",
volume = "197",
pages = "524--531",
journal = "New Phytologist",
issn = "0028-646X",
publisher = "Wiley",
number = "2",

}

RIS

TY - JOUR

T1 - Trees are major conduits for methane egress from tropical forested wetlands

AU - Pangala, Sunitha Rao

AU - Moore, Sam

AU - Hornibrook, Edward R. C.

AU - Gauci, Vincent

PY - 2013/1

Y1 - 2013/1

N2 - Wetlands are the largest source of methane to the atmosphere, with tropical wetlands comprising the most significant global wetland source component. The stems of some wetland-adapted tree species are known to facilitate egress of methane from anoxic soil, but current ground-based flux chamber methods for determining methane inventories in forested wetlands neglect this emission pathway, and consequently, the contribution of tree-mediated emissions to total ecosystem methane flux remains unknown. In this study, we quantify in situ methane emissions from tree stems, peatland surfaces (ponded hollows and hummocks) and root-aerating pneumatophores in a tropical forested peatland in Southeast Asia. We show that tree stems emit substantially more methane than peat surfaces, accounting for 62-87% of total ecosystem methane flux. Tree stem flux strength was controlled by the stem diameter, wood specific density and the amount of methane dissolved in pore water. Our findings highlight the need to integrate this emission pathway in both field studies and models if wetland methane fluxes are to be characterized accurately in global methane budgets, and the discrepancies that exist between field-based flux inventories and top-down estimates of methane emissions from tropical areas are to be reconciled.

AB - Wetlands are the largest source of methane to the atmosphere, with tropical wetlands comprising the most significant global wetland source component. The stems of some wetland-adapted tree species are known to facilitate egress of methane from anoxic soil, but current ground-based flux chamber methods for determining methane inventories in forested wetlands neglect this emission pathway, and consequently, the contribution of tree-mediated emissions to total ecosystem methane flux remains unknown. In this study, we quantify in situ methane emissions from tree stems, peatland surfaces (ponded hollows and hummocks) and root-aerating pneumatophores in a tropical forested peatland in Southeast Asia. We show that tree stems emit substantially more methane than peat surfaces, accounting for 62-87% of total ecosystem methane flux. Tree stem flux strength was controlled by the stem diameter, wood specific density and the amount of methane dissolved in pore water. Our findings highlight the need to integrate this emission pathway in both field studies and models if wetland methane fluxes are to be characterized accurately in global methane budgets, and the discrepancies that exist between field-based flux inventories and top-down estimates of methane emissions from tropical areas are to be reconciled.

U2 - 10.1111/nph.12031

DO - 10.1111/nph.12031

M3 - Journal article

VL - 197

SP - 524

EP - 531

JO - New Phytologist

JF - New Phytologist

SN - 0028-646X

IS - 2

ER -