Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils
Abstract: Specific soil bacterial membrane lipids, branched glycerol dialkyl glycerol tetraethers (brGDGTs), are used as an empirical proxy for past continental temperatures. Their response to temperature change is assumed to be linear, caused by physiological plasticity of their, still unknown, sou...
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Language: | English |
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Online Access: | https://hdl.handle.net/10067/1651510151162165141 |
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ftunivantwerpen:c:irua:165151 2024-09-30T14:37:26+00:00 Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils De Jonge, Cindy Radujkovic, Dajana Sigurdsson, Bjarni D. Weedon, James Janssens, Ivan Peterse, Francien 2019 https://hdl.handle.net/10067/1651510151162165141 eng eng info:eu-repo/grantAgreement/EC/h2020/707270 info:eu-repo/semantics/altIdentifier/doi/10.1016/J.ORGGEOCHEM.2019.07.006 info:eu-repo/semantics/altIdentifier/isi/000500546700002 info:eu-repo/semantics/closedAccess 0146-6380 Organic geochemistry Physics Chemistry info:eu-repo/semantics/article 2019 ftunivantwerpen https://doi.org/10.1016/J.ORGGEOCHEM.2019.07.006 2024-09-10T04:06:39Z Abstract: Specific soil bacterial membrane lipids, branched glycerol dialkyl glycerol tetraethers (brGDGTs), are used as an empirical proxy for past continental temperatures. Their response to temperature change is assumed to be linear, caused by physiological plasticity of their, still unknown, source organisms. A well-studied set of geothermally warmed soils (Iceland) shows that the brGDGT fingerprint only changes when the soil mean annual temperature is warmer than 14 degrees C. This sudden change in brGDGT distribution coincides with an abrupt shift in the bacterial community composition in the same soils. Determining which bacterial OTUs are indicative for each soil cluster shows that Acidobacteria are possible brGDGT producers, together with representatives from the Actinobacteria, Chloroflexi, Gemmationadetes and Proteobacteria. Projecting the lipid fingerprint of the cold and warm bacterial communities onto the global soil calibration dataset creates two distinct soil clusters, in which brGDGTs respond differently to temperature and, especially, soil pH. We show that, on a local scale, a community effect rather than physiological plasticity can be the primary driver of the brGDGT-based paleothermometer along large temperature gradients. This threshold response needs to be taken into account when interpreting brGDGT-based paleo-records. (C) 2019 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Iceland IRUA - Institutional Repository van de Universiteit Antwerpen Organic Geochemistry 137 103897 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Physics Chemistry |
spellingShingle |
Physics Chemistry De Jonge, Cindy Radujkovic, Dajana Sigurdsson, Bjarni D. Weedon, James Janssens, Ivan Peterse, Francien Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
topic_facet |
Physics Chemistry |
description |
Abstract: Specific soil bacterial membrane lipids, branched glycerol dialkyl glycerol tetraethers (brGDGTs), are used as an empirical proxy for past continental temperatures. Their response to temperature change is assumed to be linear, caused by physiological plasticity of their, still unknown, source organisms. A well-studied set of geothermally warmed soils (Iceland) shows that the brGDGT fingerprint only changes when the soil mean annual temperature is warmer than 14 degrees C. This sudden change in brGDGT distribution coincides with an abrupt shift in the bacterial community composition in the same soils. Determining which bacterial OTUs are indicative for each soil cluster shows that Acidobacteria are possible brGDGT producers, together with representatives from the Actinobacteria, Chloroflexi, Gemmationadetes and Proteobacteria. Projecting the lipid fingerprint of the cold and warm bacterial communities onto the global soil calibration dataset creates two distinct soil clusters, in which brGDGTs respond differently to temperature and, especially, soil pH. We show that, on a local scale, a community effect rather than physiological plasticity can be the primary driver of the brGDGT-based paleothermometer along large temperature gradients. This threshold response needs to be taken into account when interpreting brGDGT-based paleo-records. (C) 2019 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
De Jonge, Cindy Radujkovic, Dajana Sigurdsson, Bjarni D. Weedon, James Janssens, Ivan Peterse, Francien |
author_facet |
De Jonge, Cindy Radujkovic, Dajana Sigurdsson, Bjarni D. Weedon, James Janssens, Ivan Peterse, Francien |
author_sort |
De Jonge, Cindy |
title |
Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
title_short |
Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
title_full |
Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
title_fullStr |
Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
title_full_unstemmed |
Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
title_sort |
lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils |
publishDate |
2019 |
url |
https://hdl.handle.net/10067/1651510151162165141 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
0146-6380 Organic geochemistry |
op_relation |
info:eu-repo/grantAgreement/EC/h2020/707270 info:eu-repo/semantics/altIdentifier/doi/10.1016/J.ORGGEOCHEM.2019.07.006 info:eu-repo/semantics/altIdentifier/isi/000500546700002 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/J.ORGGEOCHEM.2019.07.006 |
container_title |
Organic Geochemistry |
container_volume |
137 |
container_start_page |
103897 |
_version_ |
1811640294770212864 |