Nitrous oxide emissions from trees planted on a closed landfill site

A. Fraser-Mcdonald; C. Boardman; T. Gladding; S. Burnley; V. Gauci

doi:10.3934/environsci.2023018

Nitrous oxide emissions from trees planted on a closed landfill site

A. Fraser-Mcdonald^*, C. Boardman, T. Gladding, S. Burnley, V. Gauci

^*Corresponding author for this work

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Abstract

Trees growing in natural and managed environments have the capacity to act as conduits for the transport of greenhouse gases produced belowground to the atmosphere. Nitrous oxide (N2O) emissions have been observed from tree stems in natural ecosystems but have not yet been measured in the context of forested former landfill sites. This research gap was addressed by an investigation quantifying stem and soil N2O emissions from a closed UK landfill and a comparable natural site. Measurements were made by using flux chambers and gas chromatography over a four-month period. Analyses showed that the average N2O stem fluxes from the landfill and non-landfill sites were 0.63 ± 0.06 µg m^–2 h^–1 and 0.26 ± 0.05 µg m^–2 h^–1, respectively. The former landfill site showed seasonal patterns in N2O stem emissions and decreasing N2O fluxes with increased stem sampling position above the forest floor. Tree stem emissions accounted for 1% of the total landfill N2O surface flux, which is lower than the contribution of stem fluxes to the total surface flux in dry and flooded boreal forests.

Original language	English
Pages (from-to)	313-324
Number of pages	12
Journal	AIMS Environmental Science
Volume	10
Issue number	2
DOIs	https://doi.org/10.3934/environsci.2023018
Publication status	Published - 14 Apr 2023

Bibliographical note

Funding Information:
The manuscript is based on thesis work which was internally funded by The Open University. We are grateful to Julie Fraser and Ben Sharp for fieldwork assistance, Fotis Sgouridis (University of Bristol) for sample analysis, and to the EGL technicians at the Open University for their support. We would also like to thank the local authorities and trusts responsible for the field sites for providing access to conduct fieldwork.

Publisher Copyright:
© 2023 the Author(s), licensee AIMS Press.

Keywords

GHG emissions
landfill
nitrogen cycle
spatial variability
temporal variability
tree stem N2O

ASJC Scopus subject areas

General Environmental Science

Access to Document

10.3934/environsci.2023018Licence: Creative Commons: Attribution (CC BY)

FraserMcDonaldA2023NitrousFinal published version, 508 KBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Nitrous oxide emissions from trees planted on a closed landfill site",

abstract = "Trees growing in natural and managed environments have the capacity to act as conduits for the transport of greenhouse gases produced belowground to the atmosphere. Nitrous oxide (N2O) emissions have been observed from tree stems in natural ecosystems but have not yet been measured in the context of forested former landfill sites. This research gap was addressed by an investigation quantifying stem and soil N2O emissions from a closed UK landfill and a comparable natural site. Measurements were made by using flux chambers and gas chromatography over a four-month period. Analyses showed that the average N2O stem fluxes from the landfill and non-landfill sites were 0.63 ± 0.06 µg m–2 h–1 and 0.26 ± 0.05 µg m–2 h–1, respectively. The former landfill site showed seasonal patterns in N2O stem emissions and decreasing N2O fluxes with increased stem sampling position above the forest floor. Tree stem emissions accounted for 1% of the total landfill N2O surface flux, which is lower than the contribution of stem fluxes to the total surface flux in dry and flooded boreal forests.",

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N2 - Trees growing in natural and managed environments have the capacity to act as conduits for the transport of greenhouse gases produced belowground to the atmosphere. Nitrous oxide (N2O) emissions have been observed from tree stems in natural ecosystems but have not yet been measured in the context of forested former landfill sites. This research gap was addressed by an investigation quantifying stem and soil N2O emissions from a closed UK landfill and a comparable natural site. Measurements were made by using flux chambers and gas chromatography over a four-month period. Analyses showed that the average N2O stem fluxes from the landfill and non-landfill sites were 0.63 ± 0.06 µg m–2 h–1 and 0.26 ± 0.05 µg m–2 h–1, respectively. The former landfill site showed seasonal patterns in N2O stem emissions and decreasing N2O fluxes with increased stem sampling position above the forest floor. Tree stem emissions accounted for 1% of the total landfill N2O surface flux, which is lower than the contribution of stem fluxes to the total surface flux in dry and flooded boreal forests.

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Nitrous oxide emissions from trees planted on a closed landfill site

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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