Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Interactive effects of depth and temperature on CH4 and N2O flux in a shallow podzol
AU - Mills, R. T. E.
AU - Dewhirst, N.
AU - Sowerby, A.
AU - Emmett, B. A.
AU - Jones, D. L.
PY - 2013/7
Y1 - 2013/7
N2 - Measuring and modelling the efflux of greenhouse gases from soils is crucial for gauging ecosystem responses to climate and land-use change, and potential contributions and feedbacks to gas emissions. Upland soils with high amounts of organic matter can produce large effluxes of CH4 and potentially N2O, and therefore understanding the sensitivity of such fluxes to changes in climate (e.g. temperature) is of importance. Here we consider the role of shallow podzols in the temperature response of CH4 and N2O efflux using a simple laboratory incubation. Such soils have a shallow peat layer overlain by coarse organic matter, and by splitting and incubating these layers across a 1-30 degrees C temperature ramp, we observed a significant negative temperature response for both gases, and a gas-dependent effect on the presence of a between-layer difference. Given these observations, there is a need to consider the temperature sensitivity of near surface layers as distinct, and to recognise the potential for shallow podzols to have a strong source sink transition across temperature ranges. (C) 2013 Elsevier Ltd. All rights reserved.
AB - Measuring and modelling the efflux of greenhouse gases from soils is crucial for gauging ecosystem responses to climate and land-use change, and potential contributions and feedbacks to gas emissions. Upland soils with high amounts of organic matter can produce large effluxes of CH4 and potentially N2O, and therefore understanding the sensitivity of such fluxes to changes in climate (e.g. temperature) is of importance. Here we consider the role of shallow podzols in the temperature response of CH4 and N2O efflux using a simple laboratory incubation. Such soils have a shallow peat layer overlain by coarse organic matter, and by splitting and incubating these layers across a 1-30 degrees C temperature ramp, we observed a significant negative temperature response for both gases, and a gas-dependent effect on the presence of a between-layer difference. Given these observations, there is a need to consider the temperature sensitivity of near surface layers as distinct, and to recognise the potential for shallow podzols to have a strong source sink transition across temperature ranges. (C) 2013 Elsevier Ltd. All rights reserved.
KW - Greenhouse gas
KW - Methane
KW - Nitrous oxide
KW - Soil organic matter
KW - Biogeochemisty
KW - WATER-TABLE
KW - METHANE PRODUCTION
KW - NITROGEN DYNAMICS
KW - SOIL RESPIRATION
KW - CARBON-DIOXIDE
KW - CLIMATE-CHANGE
KW - FOREST SOIL
KW - BOREAL FEN
KW - PEAT SOILS
KW - EMISSIONS
U2 - 10.1016/j.soilbio.2013.03.003
DO - 10.1016/j.soilbio.2013.03.003
M3 - Journal article
VL - 62
SP - 1
EP - 4
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
SN - 0038-0717
ER -