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Sustained impact of drought on wet shrublands mediated by soil physical changes

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Sustained impact of drought on wet shrublands mediated by soil physical changes. / Dominguez, Maria T.; Sowerby, Alwyn; Smith, Andrew R.; Robinson, David A.; Van Baarsel, Susie; Mills, Robert; Marshall, Miles R.; Koller, Eva; Lebron, Inma; Hall, Jane; Emmett, Bridget A.

In: Biogeochemistry, Vol. 122, No. 2-3, 02.2015, p. 151-163.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Dominguez, MT, Sowerby, A, Smith, AR, Robinson, DA, Van Baarsel, S, Mills, R, Marshall, MR, Koller, E, Lebron, I, Hall, J & Emmett, BA 2015, 'Sustained impact of drought on wet shrublands mediated by soil physical changes', Biogeochemistry, vol. 122, no. 2-3, pp. 151-163. https://doi.org/10.1007/s10533-014-0059-y

APA

Dominguez, M. T., Sowerby, A., Smith, A. R., Robinson, D. A., Van Baarsel, S., Mills, R., Marshall, M. R., Koller, E., Lebron, I., Hall, J., & Emmett, B. A. (2015). Sustained impact of drought on wet shrublands mediated by soil physical changes. Biogeochemistry, 122(2-3), 151-163. https://doi.org/10.1007/s10533-014-0059-y

Vancouver

Dominguez MT, Sowerby A, Smith AR, Robinson DA, Van Baarsel S, Mills R et al. Sustained impact of drought on wet shrublands mediated by soil physical changes. Biogeochemistry. 2015 Feb;122(2-3):151-163. https://doi.org/10.1007/s10533-014-0059-y

Author

Dominguez, Maria T. ; Sowerby, Alwyn ; Smith, Andrew R. ; Robinson, David A. ; Van Baarsel, Susie ; Mills, Robert ; Marshall, Miles R. ; Koller, Eva ; Lebron, Inma ; Hall, Jane ; Emmett, Bridget A. / Sustained impact of drought on wet shrublands mediated by soil physical changes. In: Biogeochemistry. 2015 ; Vol. 122, No. 2-3. pp. 151-163.

Bibtex

@article{cb353062cbb74e69a8e778df5daf046b,
title = "Sustained impact of drought on wet shrublands mediated by soil physical changes",
abstract = "Projected climate warming may substantially increase carbon emissions from wet organic soils, contributing to a positive feedback between the terrestrial carbon cycle and climate change. Evidence suggests that in these soils the stimulation of soil respiration by warming can be sustained over long periods of time due to the large availability of C substrates. However, the long-term response of wet organic soils to drought remains uncertain. Organo-mineral soils might be particularly vulnerable, because of their limited soil moisture pool to buffer drought events. Using a whole-ecosystem climate-change experiment in North Wales (UK) we show that soil respiration in podzolic (organo-mineral) soils from wet shrublands is more vulnerable to recurrent drought than to warming, and that the drought impact does not attenuate at decadal time scales. Stimulation of soil respiration by drought was linked to major changes in soil structure that led to a 54 % reduction in water holding capacity compared to control. Bryophyte abundance was found to buffer soil moisture losses, moderating soil CO2 efflux under warming. As there was no evidence of change in plant productivity to offset the increased soil C emissions under drought, this response may result in a positive climate feedback. The results indicate the potentially critical role that changes in sub-dominant vegetation and in soil physical properties may have in determining climate change impacts on soil C dynamics.",
keywords = "Soil respiration, Acclimation, Water retention, Warming, Bryophyte, Calluna vulgaris, Soil structure, CLIMATE-CHANGE EXPERIMENT, CARBON-CYCLE FEEDBACK, HETEROTROPHIC RESPIRATION, TEMPERATURE SENSITIVITY, TERRESTRIAL ECOSYSTEMS, MICROBIAL COMMUNITY, THERMAL-ACCLIMATION, SUMMER DROUGHT, HEATHLAND SOIL, DECOMPOSITION",
author = "Dominguez, {Maria T.} and Alwyn Sowerby and Smith, {Andrew R.} and Robinson, {David A.} and {Van Baarsel}, Susie and Robert Mills and Marshall, {Miles R.} and Eva Koller and Inma Lebron and Jane Hall and Emmett, {Bridget A.}",
year = "2015",
month = feb,
doi = "10.1007/s10533-014-0059-y",
language = "English",
volume = "122",
pages = "151--163",
journal = "Biogeochemistry",
issn = "0168-2563",
publisher = "SPRINGER",
number = "2-3",

}

RIS

TY - JOUR

T1 - Sustained impact of drought on wet shrublands mediated by soil physical changes

AU - Dominguez, Maria T.

AU - Sowerby, Alwyn

AU - Smith, Andrew R.

AU - Robinson, David A.

AU - Van Baarsel, Susie

AU - Mills, Robert

AU - Marshall, Miles R.

AU - Koller, Eva

AU - Lebron, Inma

AU - Hall, Jane

AU - Emmett, Bridget A.

PY - 2015/2

Y1 - 2015/2

N2 - Projected climate warming may substantially increase carbon emissions from wet organic soils, contributing to a positive feedback between the terrestrial carbon cycle and climate change. Evidence suggests that in these soils the stimulation of soil respiration by warming can be sustained over long periods of time due to the large availability of C substrates. However, the long-term response of wet organic soils to drought remains uncertain. Organo-mineral soils might be particularly vulnerable, because of their limited soil moisture pool to buffer drought events. Using a whole-ecosystem climate-change experiment in North Wales (UK) we show that soil respiration in podzolic (organo-mineral) soils from wet shrublands is more vulnerable to recurrent drought than to warming, and that the drought impact does not attenuate at decadal time scales. Stimulation of soil respiration by drought was linked to major changes in soil structure that led to a 54 % reduction in water holding capacity compared to control. Bryophyte abundance was found to buffer soil moisture losses, moderating soil CO2 efflux under warming. As there was no evidence of change in plant productivity to offset the increased soil C emissions under drought, this response may result in a positive climate feedback. The results indicate the potentially critical role that changes in sub-dominant vegetation and in soil physical properties may have in determining climate change impacts on soil C dynamics.

AB - Projected climate warming may substantially increase carbon emissions from wet organic soils, contributing to a positive feedback between the terrestrial carbon cycle and climate change. Evidence suggests that in these soils the stimulation of soil respiration by warming can be sustained over long periods of time due to the large availability of C substrates. However, the long-term response of wet organic soils to drought remains uncertain. Organo-mineral soils might be particularly vulnerable, because of their limited soil moisture pool to buffer drought events. Using a whole-ecosystem climate-change experiment in North Wales (UK) we show that soil respiration in podzolic (organo-mineral) soils from wet shrublands is more vulnerable to recurrent drought than to warming, and that the drought impact does not attenuate at decadal time scales. Stimulation of soil respiration by drought was linked to major changes in soil structure that led to a 54 % reduction in water holding capacity compared to control. Bryophyte abundance was found to buffer soil moisture losses, moderating soil CO2 efflux under warming. As there was no evidence of change in plant productivity to offset the increased soil C emissions under drought, this response may result in a positive climate feedback. The results indicate the potentially critical role that changes in sub-dominant vegetation and in soil physical properties may have in determining climate change impacts on soil C dynamics.

KW - Soil respiration

KW - Acclimation

KW - Water retention

KW - Warming

KW - Bryophyte

KW - Calluna vulgaris

KW - Soil structure

KW - CLIMATE-CHANGE EXPERIMENT

KW - CARBON-CYCLE FEEDBACK

KW - HETEROTROPHIC RESPIRATION

KW - TEMPERATURE SENSITIVITY

KW - TERRESTRIAL ECOSYSTEMS

KW - MICROBIAL COMMUNITY

KW - THERMAL-ACCLIMATION

KW - SUMMER DROUGHT

KW - HEATHLAND SOIL

KW - DECOMPOSITION

U2 - 10.1007/s10533-014-0059-y

DO - 10.1007/s10533-014-0059-y

M3 - Journal article

VL - 122

SP - 151

EP - 163

JO - Biogeochemistry

JF - Biogeochemistry

SN - 0168-2563

IS - 2-3

ER -