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In situ soil COS exchange of a temperate mountain grassland under simulated drought

During recent years, carbonyl sulfide (COS), a trace gas with a similar diffusion pathway into leaves as carbon dioxide (CO(2)), but with no known “respiration-like” leaf source, has been discussed as a promising new approach for partitioning net ecosystem-scale CO(2) fluxes into photosynthesis and...

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Autores principales: Kitz, Florian, Gerdel, Katharina, Hammerle, Albin, Laterza, Tamara, Spielmann, Felix M., Wohlfahrt, Georg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5339329/
https://www.ncbi.nlm.nih.gov/pubmed/28070699
http://dx.doi.org/10.1007/s00442-016-3805-0
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author Kitz, Florian
Gerdel, Katharina
Hammerle, Albin
Laterza, Tamara
Spielmann, Felix M.
Wohlfahrt, Georg
author_facet Kitz, Florian
Gerdel, Katharina
Hammerle, Albin
Laterza, Tamara
Spielmann, Felix M.
Wohlfahrt, Georg
author_sort Kitz, Florian
collection PubMed
description During recent years, carbonyl sulfide (COS), a trace gas with a similar diffusion pathway into leaves as carbon dioxide (CO(2)), but with no known “respiration-like” leaf source, has been discussed as a promising new approach for partitioning net ecosystem-scale CO(2) fluxes into photosynthesis and respiration. The utility of COS for flux partitioning at the ecosystem scale critically depends on the understanding of non-leaf sources and sinks of COS. This study assessed the contribution of the soil to ecosystem-scale COS fluxes under simulated drought conditions at temperate grassland in the Central Alps. We used transparent steady-state flow-through chambers connected to a quantum cascade laser spectrometer to measure the COS and CO(2) gas exchange between the soil surface and the atmosphere. Soils were a source of COS during the day, emissions being mainly driven by incoming solar radiation and to a lesser degree soil temperature. Soil water content had a negligible influence on soil COS exchange and thus the drought and control treatment were statistically not significantly different. Overall, daytime fluxes were large (12.5 ± 13.8 pmol m(−2) s(−1)) in their magnitude and consistently positive compared to the previous studies, which predominantly used dark chambers. Nighttime measurements revealed soil COS fluxes around zero, as did measurements with darkened soil chambers during daytime reinforcing the importance of incoming solar radiation. Our results suggest that abiotic drivers play a key role in controlling in situ soil COS fluxes of the investigated grassland. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00442-016-3805-0) contains supplementary material, which is available to authorized users.
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spelling pubmed-53393292017-03-17 In situ soil COS exchange of a temperate mountain grassland under simulated drought Kitz, Florian Gerdel, Katharina Hammerle, Albin Laterza, Tamara Spielmann, Felix M. Wohlfahrt, Georg Oecologia Ecosystem Ecology–Original Research During recent years, carbonyl sulfide (COS), a trace gas with a similar diffusion pathway into leaves as carbon dioxide (CO(2)), but with no known “respiration-like” leaf source, has been discussed as a promising new approach for partitioning net ecosystem-scale CO(2) fluxes into photosynthesis and respiration. The utility of COS for flux partitioning at the ecosystem scale critically depends on the understanding of non-leaf sources and sinks of COS. This study assessed the contribution of the soil to ecosystem-scale COS fluxes under simulated drought conditions at temperate grassland in the Central Alps. We used transparent steady-state flow-through chambers connected to a quantum cascade laser spectrometer to measure the COS and CO(2) gas exchange between the soil surface and the atmosphere. Soils were a source of COS during the day, emissions being mainly driven by incoming solar radiation and to a lesser degree soil temperature. Soil water content had a negligible influence on soil COS exchange and thus the drought and control treatment were statistically not significantly different. Overall, daytime fluxes were large (12.5 ± 13.8 pmol m(−2) s(−1)) in their magnitude and consistently positive compared to the previous studies, which predominantly used dark chambers. Nighttime measurements revealed soil COS fluxes around zero, as did measurements with darkened soil chambers during daytime reinforcing the importance of incoming solar radiation. Our results suggest that abiotic drivers play a key role in controlling in situ soil COS fluxes of the investigated grassland. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00442-016-3805-0) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2017-01-09 2017 /pmc/articles/PMC5339329/ /pubmed/28070699 http://dx.doi.org/10.1007/s00442-016-3805-0 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Ecosystem Ecology–Original Research
Kitz, Florian
Gerdel, Katharina
Hammerle, Albin
Laterza, Tamara
Spielmann, Felix M.
Wohlfahrt, Georg
In situ soil COS exchange of a temperate mountain grassland under simulated drought
title In situ soil COS exchange of a temperate mountain grassland under simulated drought
title_full In situ soil COS exchange of a temperate mountain grassland under simulated drought
title_fullStr In situ soil COS exchange of a temperate mountain grassland under simulated drought
title_full_unstemmed In situ soil COS exchange of a temperate mountain grassland under simulated drought
title_short In situ soil COS exchange of a temperate mountain grassland under simulated drought
title_sort in situ soil cos exchange of a temperate mountain grassland under simulated drought
topic Ecosystem Ecology–Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5339329/
https://www.ncbi.nlm.nih.gov/pubmed/28070699
http://dx.doi.org/10.1007/s00442-016-3805-0
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