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Root oxygen mitigates methane fluxes in tropical peatlands

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Root oxygen mitigates methane fluxes in tropical peatlands. / Girkin, N.T.; Vane, C.H.; Turner, B.L. et al.
In: Environmental Research Letters, Vol. 15, No. 6, 064013, 27.05.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Girkin, NT, Vane, CH, Turner, BL, Ostle, NJ & Sjögersten, S 2020, 'Root oxygen mitigates methane fluxes in tropical peatlands', Environmental Research Letters, vol. 15, no. 6, 064013. https://doi.org/10.1088/1748-9326/ab8495

APA

Girkin, N. T., Vane, C. H., Turner, B. L., Ostle, N. J., & Sjögersten, S. (2020). Root oxygen mitigates methane fluxes in tropical peatlands. Environmental Research Letters, 15(6), Article 064013. https://doi.org/10.1088/1748-9326/ab8495

Vancouver

Girkin NT, Vane CH, Turner BL, Ostle NJ, Sjögersten S. Root oxygen mitigates methane fluxes in tropical peatlands. Environmental Research Letters. 2020 May 27;15(6):064013. doi: 10.1088/1748-9326/ab8495

Author

Girkin, N.T. ; Vane, C.H. ; Turner, B.L. et al. / Root oxygen mitigates methane fluxes in tropical peatlands. In: Environmental Research Letters. 2020 ; Vol. 15, No. 6.

Bibtex

@article{087853c370424c848e9dda7e6d42268b,
title = "Root oxygen mitigates methane fluxes in tropical peatlands",
abstract = "Tropical peatlands are a globally important source of methane, a potent greenhouse gas. Vegetation is critical in regulating fluxes, providing a conduit for emissions and regular carbon inputs. However, plant roots also release oxygen, which might mitigate methane efflux through oxidation prior to emission from the peat surface. Here we show, using in situ mesocosms, that root exclusion can reduce methane fluxes by a maximum of 92% depending on species, likely driven by the significant decrease in root inputs of oxygen and changes in the balance of methane transport pathways. Methanotroph abundance decreased with reduced oxygen input, demonstrating a likely mechanism for the observed response. These first methane oxidation estimates for a tropical peatland demonstrate that although plants provide an important pathway for methane loss, this can be balanced by the influence of root oxygen inputs that mitigate peat surface methane emissions.",
keywords = "methane, methanogenesis, methanotrophy, oxygen, tropical peat, Greenhouse gases, Oxygen, Peat, Tropics, Wetlands, Methane emissions, Methane fluxes, Methane loss, Methane oxidation, Methanotrophs, Plant roots, Situ mesocosms, Transport pathways, Methane, bacterium, carbon emission, greenhouse gas, mesocosm, oxidation, peatland, reduction, root system, tropical region",
author = "N.T. Girkin and C.H. Vane and B.L. Turner and N.J. Ostle and S. Sj{\"o}gersten",
year = "2020",
month = may,
day = "27",
doi = "10.1088/1748-9326/ab8495",
language = "English",
volume = "15",
journal = "Environmental Research Letters",
issn = "1748-9326",
publisher = "IOP Publishing Ltd",
number = "6",

}

RIS

TY - JOUR

T1 - Root oxygen mitigates methane fluxes in tropical peatlands

AU - Girkin, N.T.

AU - Vane, C.H.

AU - Turner, B.L.

AU - Ostle, N.J.

AU - Sjögersten, S.

PY - 2020/5/27

Y1 - 2020/5/27

N2 - Tropical peatlands are a globally important source of methane, a potent greenhouse gas. Vegetation is critical in regulating fluxes, providing a conduit for emissions and regular carbon inputs. However, plant roots also release oxygen, which might mitigate methane efflux through oxidation prior to emission from the peat surface. Here we show, using in situ mesocosms, that root exclusion can reduce methane fluxes by a maximum of 92% depending on species, likely driven by the significant decrease in root inputs of oxygen and changes in the balance of methane transport pathways. Methanotroph abundance decreased with reduced oxygen input, demonstrating a likely mechanism for the observed response. These first methane oxidation estimates for a tropical peatland demonstrate that although plants provide an important pathway for methane loss, this can be balanced by the influence of root oxygen inputs that mitigate peat surface methane emissions.

AB - Tropical peatlands are a globally important source of methane, a potent greenhouse gas. Vegetation is critical in regulating fluxes, providing a conduit for emissions and regular carbon inputs. However, plant roots also release oxygen, which might mitigate methane efflux through oxidation prior to emission from the peat surface. Here we show, using in situ mesocosms, that root exclusion can reduce methane fluxes by a maximum of 92% depending on species, likely driven by the significant decrease in root inputs of oxygen and changes in the balance of methane transport pathways. Methanotroph abundance decreased with reduced oxygen input, demonstrating a likely mechanism for the observed response. These first methane oxidation estimates for a tropical peatland demonstrate that although plants provide an important pathway for methane loss, this can be balanced by the influence of root oxygen inputs that mitigate peat surface methane emissions.

KW - methane

KW - methanogenesis

KW - methanotrophy

KW - oxygen

KW - tropical peat

KW - Greenhouse gases

KW - Oxygen

KW - Peat

KW - Tropics

KW - Wetlands

KW - Methane emissions

KW - Methane fluxes

KW - Methane loss

KW - Methane oxidation

KW - Methanotrophs

KW - Plant roots

KW - Situ mesocosms

KW - Transport pathways

KW - Methane

KW - bacterium

KW - carbon emission

KW - greenhouse gas

KW - mesocosm

KW - oxidation

KW - peatland

KW - reduction

KW - root system

KW - tropical region

U2 - 10.1088/1748-9326/ab8495

DO - 10.1088/1748-9326/ab8495

M3 - Journal article

VL - 15

JO - Environmental Research Letters

JF - Environmental Research Letters

SN - 1748-9326

IS - 6

M1 - 064013

ER -