Marine crenarchaeotal membrane lipids in decapods

Pelagic Crenarchaeota produce glycerol dibiphytanyl glycerol tetraethers (GDGTs) as membrane lipids, and the GDGT composition changes according to growth temperature. This forms the basis of the TEX86 paleotemperature proxy. This ratio correlates with sea surface temperature (SST) despite the fact t...

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Autores: Huguet, Carme|||0000-0001-8025-2010, Cartes Rodríguez, Joan E., Damsté, Jaap S. Sinninghe, Schouten, Stefan
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:181776
Acceso en línea:https://ddd.uab.cat/record/181776
https://dx.doi.org/urn:doi:10.1029/2006GC001305
Access Level:acceso abierto
Palabra clave:TEX86
Sea surface temperature
Crenarchaeota
GDGT transport
Decapods
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spelling Marine crenarchaeotal membrane lipids in decapodsimplications for the TEX 86 paleothermometerHuguet, Carme|||0000-0001-8025-2010Cartes Rodríguez, Joan E.Damsté, Jaap S. SinningheSchouten, StefanTEX86Sea surface temperatureCrenarchaeotaGDGT transportDecapodsPelagic Crenarchaeota produce glycerol dibiphytanyl glycerol tetraethers (GDGTs) as membrane lipids, and the GDGT composition changes according to growth temperature. This forms the basis of the TEX86 paleotemperature proxy. This ratio correlates with sea surface temperature (SST) despite the fact that Crenarchaeota are distributed through the water column. Therefore there must be mechanisms that transport the surface signal to sediments such as repackaging in fecal pellets, marine snow, mass falls after phytoplankton blooms, or daily migration. To study GDGT transport, we analyzed stomachs and intestines of Atlantic and Mediterranean decapods as they are one of the major megafaunal groups, are easy to sample, and occur in both pelagic and benthic environments. GDGTs were found in most decapods' guts. GDGT abundances are significantly lower in intestines, but TEX86-derived temperatures are not significantly different between stomachs and intestines (<1C), suggesting that TEX86 values are not altered during gut transit. Atlantic decapods show no difference in TEX86 values between benthic detritivors and pelagic predators. However, Mediterranean decapods show a substantial difference between macroplankton feeders and bentho-pelagic predators. This is probably related to the freshness of the material consumed. TEX86-derived temperatures in Atlantic decapods are close to the SST around the time of sampling, in agreement with stomach content analysis that shows fresh organic matter being ingested. For Mediterranean decapods, TEX86 temperatures are significantly higher than SST around the time of sampling. This can be partly attributed to the large variability between decapod specimens and the low amounts of fresh material found in their stomachs. 22006-01-0120062006-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/181776https://dx.doi.org/urn:doi:10.1029/2006GC001305reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Educación y Ciencia REN2002-00916/MARMinisterio de Educación y Ciencia REN2002-00920/MARopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1817762026-06-06T12:50:31Z
dc.title.none.fl_str_mv Marine crenarchaeotal membrane lipids in decapods
implications for the TEX 86 paleothermometer
title Marine crenarchaeotal membrane lipids in decapods
spellingShingle Marine crenarchaeotal membrane lipids in decapods
Huguet, Carme|||0000-0001-8025-2010
TEX86
Sea surface temperature
Crenarchaeota
GDGT transport
Decapods
title_short Marine crenarchaeotal membrane lipids in decapods
title_full Marine crenarchaeotal membrane lipids in decapods
title_fullStr Marine crenarchaeotal membrane lipids in decapods
title_full_unstemmed Marine crenarchaeotal membrane lipids in decapods
title_sort Marine crenarchaeotal membrane lipids in decapods
dc.creator.none.fl_str_mv Huguet, Carme|||0000-0001-8025-2010
Cartes Rodríguez, Joan E.
Damsté, Jaap S. Sinninghe
Schouten, Stefan
author Huguet, Carme|||0000-0001-8025-2010
author_facet Huguet, Carme|||0000-0001-8025-2010
Cartes Rodríguez, Joan E.
Damsté, Jaap S. Sinninghe
Schouten, Stefan
author_role author
author2 Cartes Rodríguez, Joan E.
Damsté, Jaap S. Sinninghe
Schouten, Stefan
author2_role author
author
author
dc.subject.none.fl_str_mv TEX86
Sea surface temperature
Crenarchaeota
GDGT transport
Decapods
topic TEX86
Sea surface temperature
Crenarchaeota
GDGT transport
Decapods
description Pelagic Crenarchaeota produce glycerol dibiphytanyl glycerol tetraethers (GDGTs) as membrane lipids, and the GDGT composition changes according to growth temperature. This forms the basis of the TEX86 paleotemperature proxy. This ratio correlates with sea surface temperature (SST) despite the fact that Crenarchaeota are distributed through the water column. Therefore there must be mechanisms that transport the surface signal to sediments such as repackaging in fecal pellets, marine snow, mass falls after phytoplankton blooms, or daily migration. To study GDGT transport, we analyzed stomachs and intestines of Atlantic and Mediterranean decapods as they are one of the major megafaunal groups, are easy to sample, and occur in both pelagic and benthic environments. GDGTs were found in most decapods' guts. GDGT abundances are significantly lower in intestines, but TEX86-derived temperatures are not significantly different between stomachs and intestines (<1C), suggesting that TEX86 values are not altered during gut transit. Atlantic decapods show no difference in TEX86 values between benthic detritivors and pelagic predators. However, Mediterranean decapods show a substantial difference between macroplankton feeders and bentho-pelagic predators. This is probably related to the freshness of the material consumed. TEX86-derived temperatures in Atlantic decapods are close to the SST around the time of sampling, in agreement with stomach content analysis that shows fresh organic matter being ingested. For Mediterranean decapods, TEX86 temperatures are significantly higher than SST around the time of sampling. This can be partly attributed to the large variability between decapod specimens and the low amounts of fresh material found in their stomachs.
publishDate 2006
dc.date.none.fl_str_mv 2
2006-01-01
2006
2006-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/181776
https://dx.doi.org/urn:doi:10.1029/2006GC001305
url https://ddd.uab.cat/record/181776
https://dx.doi.org/urn:doi:10.1029/2006GC001305
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Educación y Ciencia REN2002-00916/MAR
Ministerio de Educación y Ciencia REN2002-00920/MAR
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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