Nitrous Oxide consumption potentials of well-drained forest soils in Southern Québec, Canada

Rebeccah Frasier; Sami Ullah; Tim R. Moore

doi:10.1080/01490450903232199

Nitrous Oxide consumption potentials of well-drained forest soils in Southern Québec, Canada

Rebeccah Frasier, Sami Ullah^*, Tim R. Moore

^*Corresponding author for this work

Geography

Research output: Contribution to journal › Article › peer-review

Abstract

To establish the major controls on N₂O consumption by forest soils, we conducted laboratory incubations of 16 samples from four soil types, two organic and two mineral, varying in overlying forest vegetation (sugar maple, American beech and eastern hemlock). The fastest potential consumption of N₂O occurred under anoxic conditionswith little soil nitrate and under elevated headspaceN2O concentration. Potential N₂O consumption rates were fastest in organic soils under hemlock and beech trees (111 and 75 ng N₂O-N g^-1 d^-1, respectively) compared to mineral soils under beech and maple trees (45 and 41 ng N₂O-N g^-1 d^-1). Organic soils showed faster N₂O consumption rates than mineral soils, possibly due to larger organic C levels and higher C:N ratios. Acetylene treatment confirmed that denitrificationwas the process underlying N₂O consumption. These results suggest that soils regularly consume N₂O with varying magnitude, most likely in anoxic microsites throughout the soil profile and that the potential for N₂O consumption is larger in organic than in mineral forest soils.

Original language	English
Pages (from-to)	53-60
Number of pages	8
Journal	Geomicrobiology Journal
Volume	27
Issue number	1
DOIs	https://doi.org/10.1080/01490450903232199
Publication status	Published - Jan 2010

Bibliographical note

Funding Information:
Many thanks to Mike Dalva and Hélène Lalande for laboratory assistance and to Dr. M. Lechowicz and Benoît Hamel at Gault Nature Reserve, Mont St. Hilaire and Dr. J. Fyles and Christina Izdiak at Morgan Arboretum for access to forest sites. The research was supported by grants from the Canadian Foundation for Climate and Atmospheric Sciences, the Natural Sciences and Engineering Research Council of Canada and the Faculty of Science, McGill University.

Keywords

Denitrification
Forest soils
N cycling
NO consumption
NO fluxes
NO production
Nitrification

ASJC Scopus subject areas

Microbiology
Environmental Chemistry
General Environmental Science
Earth and Planetary Sciences (miscellaneous)

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title = "Nitrous Oxide consumption potentials of well-drained forest soils in Southern Qu{\'e}bec, Canada",

abstract = "To establish the major controls on N2O consumption by forest soils, we conducted laboratory incubations of 16 samples from four soil types, two organic and two mineral, varying in overlying forest vegetation (sugar maple, American beech and eastern hemlock). The fastest potential consumption of N2O occurred under anoxic conditionswith little soil nitrate and under elevated headspaceN2O concentration. Potential N2O consumption rates were fastest in organic soils under hemlock and beech trees (111 and 75 ng N2O-N g-1 d-1, respectively) compared to mineral soils under beech and maple trees (45 and 41 ng N2O-N g-1 d-1). Organic soils showed faster N2O consumption rates than mineral soils, possibly due to larger organic C levels and higher C:N ratios. Acetylene treatment confirmed that denitrificationwas the process underlying N2O consumption. These results suggest that soils regularly consume N2O with varying magnitude, most likely in anoxic microsites throughout the soil profile and that the potential for N2O consumption is larger in organic than in mineral forest soils.",

keywords = "Denitrification, Forest soils, N cycling, NO consumption, NO fluxes, NO production, Nitrification",

author = "Rebeccah Frasier and Sami Ullah and Moore, {Tim R.}",

note = "Funding Information: Many thanks to Mike Dalva and H{\'e}l{\`e}ne Lalande for laboratory assistance and to Dr. M. Lechowicz and Beno{\^i}t Hamel at Gault Nature Reserve, Mont St. Hilaire and Dr. J. Fyles and Christina Izdiak at Morgan Arboretum for access to forest sites. The research was supported by grants from the Canadian Foundation for Climate and Atmospheric Sciences, the Natural Sciences and Engineering Research Council of Canada and the Faculty of Science, McGill University.",

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AU - Frasier, Rebeccah

AU - Ullah, Sami

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N2 - To establish the major controls on N2O consumption by forest soils, we conducted laboratory incubations of 16 samples from four soil types, two organic and two mineral, varying in overlying forest vegetation (sugar maple, American beech and eastern hemlock). The fastest potential consumption of N2O occurred under anoxic conditionswith little soil nitrate and under elevated headspaceN2O concentration. Potential N2O consumption rates were fastest in organic soils under hemlock and beech trees (111 and 75 ng N2O-N g-1 d-1, respectively) compared to mineral soils under beech and maple trees (45 and 41 ng N2O-N g-1 d-1). Organic soils showed faster N2O consumption rates than mineral soils, possibly due to larger organic C levels and higher C:N ratios. Acetylene treatment confirmed that denitrificationwas the process underlying N2O consumption. These results suggest that soils regularly consume N2O with varying magnitude, most likely in anoxic microsites throughout the soil profile and that the potential for N2O consumption is larger in organic than in mineral forest soils.

AB - To establish the major controls on N2O consumption by forest soils, we conducted laboratory incubations of 16 samples from four soil types, two organic and two mineral, varying in overlying forest vegetation (sugar maple, American beech and eastern hemlock). The fastest potential consumption of N2O occurred under anoxic conditionswith little soil nitrate and under elevated headspaceN2O concentration. Potential N2O consumption rates were fastest in organic soils under hemlock and beech trees (111 and 75 ng N2O-N g-1 d-1, respectively) compared to mineral soils under beech and maple trees (45 and 41 ng N2O-N g-1 d-1). Organic soils showed faster N2O consumption rates than mineral soils, possibly due to larger organic C levels and higher C:N ratios. Acetylene treatment confirmed that denitrificationwas the process underlying N2O consumption. These results suggest that soils regularly consume N2O with varying magnitude, most likely in anoxic microsites throughout the soil profile and that the potential for N2O consumption is larger in organic than in mineral forest soils.

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KW - N cycling

KW - NO consumption

KW - NO fluxes

KW - NO production

KW - Nitrification

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Nitrous Oxide consumption potentials of well-drained forest soils in Southern Québec, Canada

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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