Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake

To appraise the application of isoprenoid glycerol dialkyl glycerol tetraethers (isoGDGTs) as paleoclimate proxies in small lakes we investigated the effect of seasonal variability in temperature and dissolved oxygen concentration (DO) on the GDGT contents and its proxy in the water column of an oli...

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Autores: Cao, Min, Rivas-Ruiz, Pedro, Trapote, Maria del Carmen, Vegas-Vilarrúbia, Teresa, Rull, Valentí, Rosell-Melé, Antoni
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/220556
Acceso en línea:http://hdl.handle.net/10261/220556
Access Level:acceso abierto
Palabra clave:Temperature reconstruction
Dissolved oxygen
isoGDGT proxy
Mediterranean area
Soils
Calibration
Sea
Variability
Sediments
Archaeal
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spelling Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lakeCao, MinRivas-Ruiz, PedroTrapote, Maria del CarmenVegas-Vilarrúbia, TeresaRull, ValentíRosell-Melé, AntoniTemperature reconstructionDissolved oxygenisoGDGT proxyMediterranean areaisoGDGT proxyDissolved oxygenTemperature reconstructionSoilsCalibrationSeaVariabilitySedimentsArchaealTo appraise the application of isoprenoid glycerol dialkyl glycerol tetraethers (isoGDGTs) as paleoclimate proxies in small lakes we investigated the effect of seasonal variability in temperature and dissolved oxygen concentration (DO) on the GDGT contents and its proxy in the water column of an oligotrophic karst lake in the Catalan pre-Pyrenees (Lake Montcortes). From October 2013 to November 2014, we collected suspended particulate matter (SPM) monthly at three depths and retrieved the sediment from a trap located at 20 m below the lake surface. The GDGT contents in the SPM and sediment trap presented a marked seasonal variation, showing the highest values in summer and autumn. In addition, the isoGDGT proxy TEX86 in SPM and sediment trap showed a marked seasonal variability which matched the temperatures of the upper water column and fit the published global trend between TEX86 and mean annual lake surface temperature (LST). However, in the hypolimnion where oxygen was depleted for most of the study period, we found that TEX86 co-varied with DO. This further confirms previous claims with seasonal field data that the sedimentary TEX86 LST signal may be confounded by DO conditions. Consequently, the application of TEX86 to estimate LST should be carefully appraised in environments with depleted DO conditions.This work was supported by the Spanish Ministry of Research through projects TETRACLIM (ref. CGL2010-15000), Montcortes-500 (ref. CGL-2012-33665); and ICTA-UAB's Maria de Maeztu award (MDM-2015-0552); and a pre-doctoral research studentship to MCT (FPI, BES2013-065846). MC was funded with a doctoral research studentship from the China Scholarship Council (CSC). Fieldwork was performed with the collaboration of E. Safont, N. Canellas and J. Goma. BES2013-065846Fieldwork permits were provided by the Territorial Service of the department of Agriculture, Livestock, Fishing and Natural Environment of Catalunya. Meteorological data in Pobla de Segur were provided by J. Sigro. We also thank N. Moraleda, C. Huguet and the UAB Analytical Service for technical support.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)Universidad Autónoma de BarcelonaChina Scholarship CouncilRull, Valentí [0000-0002-9961-105X]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/220556reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2010-15000info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL-2012-33665https://doi.org/10.1016/j.chemgeo.2020.119759Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2205562026-05-22T06:33:51Z
dc.title.none.fl_str_mv Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
title Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
spellingShingle Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
Cao, Min
Temperature reconstruction
Dissolved oxygen
isoGDGT proxy
Mediterranean area
isoGDGT proxy
Dissolved oxygen
Temperature reconstruction
Soils
Calibration
Sea
Variability
Sediments
Archaeal
title_short Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
title_full Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
title_fullStr Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
title_full_unstemmed Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
title_sort Seasonal effects of water temperature and dissolved oxygen on the isoGDGT proxy (TEX86) in a Mediterranean oligotrophic lake
dc.creator.none.fl_str_mv Cao, Min
Rivas-Ruiz, Pedro
Trapote, Maria del Carmen
Vegas-Vilarrúbia, Teresa
Rull, Valentí
Rosell-Melé, Antoni
author Cao, Min
author_facet Cao, Min
Rivas-Ruiz, Pedro
Trapote, Maria del Carmen
Vegas-Vilarrúbia, Teresa
Rull, Valentí
Rosell-Melé, Antoni
author_role author
author2 Rivas-Ruiz, Pedro
Trapote, Maria del Carmen
Vegas-Vilarrúbia, Teresa
Rull, Valentí
Rosell-Melé, Antoni
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Universidad Autónoma de Barcelona
China Scholarship Council
Rull, Valentí [0000-0002-9961-105X]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Temperature reconstruction
Dissolved oxygen
isoGDGT proxy
Mediterranean area
isoGDGT proxy
Dissolved oxygen
Temperature reconstruction
Soils
Calibration
Sea
Variability
Sediments
Archaeal
topic Temperature reconstruction
Dissolved oxygen
isoGDGT proxy
Mediterranean area
isoGDGT proxy
Dissolved oxygen
Temperature reconstruction
Soils
Calibration
Sea
Variability
Sediments
Archaeal
description To appraise the application of isoprenoid glycerol dialkyl glycerol tetraethers (isoGDGTs) as paleoclimate proxies in small lakes we investigated the effect of seasonal variability in temperature and dissolved oxygen concentration (DO) on the GDGT contents and its proxy in the water column of an oligotrophic karst lake in the Catalan pre-Pyrenees (Lake Montcortes). From October 2013 to November 2014, we collected suspended particulate matter (SPM) monthly at three depths and retrieved the sediment from a trap located at 20 m below the lake surface. The GDGT contents in the SPM and sediment trap presented a marked seasonal variation, showing the highest values in summer and autumn. In addition, the isoGDGT proxy TEX86 in SPM and sediment trap showed a marked seasonal variability which matched the temperatures of the upper water column and fit the published global trend between TEX86 and mean annual lake surface temperature (LST). However, in the hypolimnion where oxygen was depleted for most of the study period, we found that TEX86 co-varied with DO. This further confirms previous claims with seasonal field data that the sedimentary TEX86 LST signal may be confounded by DO conditions. Consequently, the application of TEX86 to estimate LST should be carefully appraised in environments with depleted DO conditions.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/220556
url http://hdl.handle.net/10261/220556
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2010-15000
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL-2012-33665
https://doi.org/10.1016/j.chemgeo.2020.119759
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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