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Decline of soil volatile organic compounds from a Mediterranean deciduous forest under a future drier climate.

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Title: Decline of soil volatile organic compounds from a Mediterranean deciduous forest under a future drier climate.
Authors: Legros, T.1 (AUTHOR) thibaud.legros@etu.univ-amu.fr, Temime-Roussel, B.2 (AUTHOR), Kammer, J.2 (AUTHOR), Quivet, E.2 (AUTHOR), Wortham, H.2 (AUTHOR), Reiter, I.M.3 (AUTHOR), Santonja, M.1 (AUTHOR), Fernandez, C.1 (AUTHOR), Ormeño, E.1 (AUTHOR) elena.ormeno@univ-amu.fr
Source: Atmospheric Environment. Jan2025, Vol. 340, pN.PAG-N.PAG. 1p.
Subjects: Proton transfer reactions, Soil respiration, Volatile organic compounds, Atmospheric chemistry, Soil temperature
Abstract: Biogenic volatile organic compounds (BVOCs) are crucial for ecosystem functioning, atmospheric chemistry and climate. While modulation of BVOC emissions from living vegetation with biotic and abiotic factors is well documented, how these factors drive soil BVOC emissions remain less understood, particularly in Mediterranean forests. To fill this gap, this pioneer study investigates whether BVOC fluxes from natural soil covered by litter (referred to as forest soil) vary under natural and amplified long-term water stress (35% annual rain exclusion over the past 10 years) in a deciduous oak Mediterranean forest (Quercus pubescens Willd.) compared to natural climate conditions. This aim has only been tackled in a single evergreen Mediterranean forest so far. Using proton transfer reaction time of flight mass spectrometer (PTR-ToF-MS) we also provide, for the first time, a detailed diurnal cycle of soil BVOCs in relation to air temperature, air humidity, and biotic factors including soil respiration and litter content in lignin, cellulose and hemicellulose. The main results revealed that forest soil represents a source of most BVOCs (e.g., acetaldehyde, acetone, acrolein, hexanol, monoterpenes) with maximum values at mid-day (42 μgC.m−2. h−1) in response to higher temperatures while it acts as a clear sink of isoprene. Total soil BVOC emission rates, together with soil respiration, decreased by 43% after a decade of partial rain restriction. These results will contribute to enhance further modeling of soil BVOC emissions under various climate scenarios both at regional and global scales. • BVOC forest soil emission rate decreased by 43% under long term amplified drought (after 10 years of summer rain exclusion). • Forest soil respiration was a strong driver of soil BVOC emissions. • Temperature was positively correlated to forest soil BVOC emissions following Tingey's model. • Forest soil BVOC followed a diurnal pattern with maximum emissions during central hours of the day. • Forest soil was mainly a source of BVOC but it was a sink of isoprene. [ABSTRACT FROM AUTHOR]
Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Decline of soil volatile organic compounds from a Mediterranean deciduous forest under a future drier climate.
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  Data: <searchLink fieldCode="AR" term="%22Legros%2C+T%2E%22">Legros, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> thibaud.legros@etu.univ-amu.fr</i><br /><searchLink fieldCode="AR" term="%22Temime-Roussel%2C+B%2E%22">Temime-Roussel, B.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kammer%2C+J%2E%22">Kammer, J.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Quivet%2C+E%2E%22">Quivet, E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wortham%2C+H%2E%22">Wortham, H.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Reiter%2C+I%2EM%2E%22">Reiter, I.M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Santonja%2C+M%2E%22">Santonja, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fernandez%2C+C%2E%22">Fernandez, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ormeño%2C+E%2E%22">Ormeño, E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> elena.ormeno@univ-amu.fr</i>
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  Data: <searchLink fieldCode="DE" term="%22Proton+transfer+reactions%22">Proton transfer reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+respiration%22">Soil respiration</searchLink><br /><searchLink fieldCode="DE" term="%22Volatile+organic+compounds%22">Volatile organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+chemistry%22">Atmospheric chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+temperature%22">Soil temperature</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Biogenic volatile organic compounds (BVOCs) are crucial for ecosystem functioning, atmospheric chemistry and climate. While modulation of BVOC emissions from living vegetation with biotic and abiotic factors is well documented, how these factors drive soil BVOC emissions remain less understood, particularly in Mediterranean forests. To fill this gap, this pioneer study investigates whether BVOC fluxes from natural soil covered by litter (referred to as forest soil) vary under natural and amplified long-term water stress (35% annual rain exclusion over the past 10 years) in a deciduous oak Mediterranean forest (Quercus pubescens Willd.) compared to natural climate conditions. This aim has only been tackled in a single evergreen Mediterranean forest so far. Using proton transfer reaction time of flight mass spectrometer (PTR-ToF-MS) we also provide, for the first time, a detailed diurnal cycle of soil BVOCs in relation to air temperature, air humidity, and biotic factors including soil respiration and litter content in lignin, cellulose and hemicellulose. The main results revealed that forest soil represents a source of most BVOCs (e.g., acetaldehyde, acetone, acrolein, hexanol, monoterpenes) with maximum values at mid-day (42 μgC.m−2. h−1) in response to higher temperatures while it acts as a clear sink of isoprene. Total soil BVOC emission rates, together with soil respiration, decreased by 43% after a decade of partial rain restriction. These results will contribute to enhance further modeling of soil BVOC emissions under various climate scenarios both at regional and global scales. • BVOC forest soil emission rate decreased by 43% under long term amplified drought (after 10 years of summer rain exclusion). • Forest soil respiration was a strong driver of soil BVOC emissions. • Temperature was positively correlated to forest soil BVOC emissions following Tingey's model. • Forest soil BVOC followed a diurnal pattern with maximum emissions during central hours of the day. • Forest soil was mainly a source of BVOC but it was a sink of isoprene. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.atmosenv.2024.120909
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Proton transfer reactions
        Type: general
      – SubjectFull: Soil respiration
        Type: general
      – SubjectFull: Volatile organic compounds
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      – SubjectFull: Atmospheric chemistry
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      – SubjectFull: Soil temperature
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      – TitleFull: Decline of soil volatile organic compounds from a Mediterranean deciduous forest under a future drier climate.
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              Text: Jan2025
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