Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America

Autores
van Bellen, Simon; Mauquoy, Dmitri; Hughes, Paul DM; Roland, Thomas P.; Daley, Tim J.; Loader, Neil J.; Street Perrott, F. Alayne; Rice, Emma M.; Pancotto, Veronica Andrea; Payne, Richard J.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The ombrotrophic peat bogs of Tierra del Fuego are located within the southern westerly wind belt (SWWB), which dominates climate variability in this region. We have reconstructed late-Holocene water-table depths from three peat bogs and aimed to relate these records to shifts in regional climate. Water-table depths were quantified by the analysis of testate amoeba assemblages, and a regional transfer function was used to infer past water-table depths. During the last 2000years, testate amoeba assemblages have been relatively stable, with a dominance of Difflugia pulex and Difflugia pristis type, and an increase in Assulina muscorum and other Euglyphida at the top of each section. Multivariate analyses show that water-table depth remained the main environmental variable explaining assemblages along the TiA12 core, but reconstructions were not significant for the two other cores. In line with the low variability in assemblages, water tables were relatively stable during the last 2000years. Slightly wetter conditions were found between ~1400 and 900 cal. BP and a pronounced recent dry shift was reconstructed in all of the three peat profiles. Considering the regional climatic context, this recent shift may have been forced by a decrease in precipitation and warmer conditions linked to an increase in the importance of the SWWB. Nevertheless, we cannot exclude the influence of higher UV-B radiation resulting from the local degradation of the ozone layer since the late 1970s, which may have had an additional effect on the relative presence of A. muscorum in the southern Patagonian region.
Fil: van Bellen, Simon . University Of Aberdeen; Reino Unido. Universite Du Quebec A Montreal; Canadá
Fil: Mauquoy, Dmitri . University Of Aberdeen; Reino Unido
Fil: Hughes, Paul DM. University Of Southampton; Reino Unido
Fil: Roland, Thomas P. . University Of Southampton; Reino Unido
Fil: Daley, Tim J. . Plymouth University; Reino Unido
Fil: Loader, Neil J. . Swansea University; Reino Unido
Fil: Street Perrott, F. Alayne. Swansea University; Reino Unido
Fil: Rice, Emma M.. Plymouth University; Reino Unido
Fil: Pancotto, Veronica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Payne, Richard J.. University Of York; Reino Unido
Materia
ASSULINA MUSCORUM
PALAEOSIG
PATAGONIA
SOUTHERN ANNULAR MODE
SOUTHERN WESTERLY WIND
UV-B
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/8712
Acceder
id CONICETDig_5ed41840a73c2b62c55034feac4bb29c
oai_identifier_str oai:ri.conicet.gov.ar:11336/8712
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South Americavan Bellen, Simon Mauquoy, Dmitri Hughes, Paul DMRoland, Thomas P. Daley, Tim J. Loader, Neil J. Street Perrott, F. AlayneRice, Emma M.Pancotto, Veronica AndreaPayne, Richard J.ASSULINA MUSCORUMPALAEOSIGPATAGONIASOUTHERN ANNULAR MODESOUTHERN WESTERLY WINDUV-Bhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The ombrotrophic peat bogs of Tierra del Fuego are located within the southern westerly wind belt (SWWB), which dominates climate variability in this region. We have reconstructed late-Holocene water-table depths from three peat bogs and aimed to relate these records to shifts in regional climate. Water-table depths were quantified by the analysis of testate amoeba assemblages, and a regional transfer function was used to infer past water-table depths. During the last 2000years, testate amoeba assemblages have been relatively stable, with a dominance of Difflugia pulex and Difflugia pristis type, and an increase in Assulina muscorum and other Euglyphida at the top of each section. Multivariate analyses show that water-table depth remained the main environmental variable explaining assemblages along the TiA12 core, but reconstructions were not significant for the two other cores. In line with the low variability in assemblages, water tables were relatively stable during the last 2000years. Slightly wetter conditions were found between ~1400 and 900 cal. BP and a pronounced recent dry shift was reconstructed in all of the three peat profiles. Considering the regional climatic context, this recent shift may have been forced by a decrease in precipitation and warmer conditions linked to an increase in the importance of the SWWB. Nevertheless, we cannot exclude the influence of higher UV-B radiation resulting from the local degradation of the ozone layer since the late 1970s, which may have had an additional effect on the relative presence of A. muscorum in the southern Patagonian region.Fil: van Bellen, Simon . University Of Aberdeen; Reino Unido. Universite Du Quebec A Montreal; CanadáFil: Mauquoy, Dmitri . University Of Aberdeen; Reino UnidoFil: Hughes, Paul DM. University Of Southampton; Reino UnidoFil: Roland, Thomas P. . University Of Southampton; Reino UnidoFil: Daley, Tim J. . Plymouth University; Reino UnidoFil: Loader, Neil J. . Swansea University; Reino UnidoFil: Street Perrott, F. Alayne. Swansea University; Reino UnidoFil: Rice, Emma M.. Plymouth University; Reino UnidoFil: Pancotto, Veronica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Payne, Richard J.. University Of York; Reino UnidoSage Publications Ltd2015-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8712van Bellen, Simon ; Mauquoy, Dmitri ; Hughes, Paul DM; Roland, Thomas P. ; Daley, Tim J. ; et al.; Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America; Sage Publications Ltd; Holocene (sevenoaks); 26; 3; 10-2015; 489-5010959-6836enginfo:eu-repo/semantics/altIdentifier/doi/10.1177/0959683615609756info:eu-repo/semantics/altIdentifier/url/http://hol.sagepub.com/content/26/3/489info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:38:47Zoai:ri.conicet.gov.ar:11336/8712instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:38:47.697CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
title Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
spellingShingle Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
van Bellen, Simon
ASSULINA MUSCORUM
PALAEOSIG
PATAGONIA
SOUTHERN ANNULAR MODE
SOUTHERN WESTERLY WIND
UV-B
title_short Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
title_full Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
title_fullStr Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
title_full_unstemmed Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
title_sort Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America
dc.creator.none.fl_str_mv van Bellen, Simon
Mauquoy, Dmitri
Hughes, Paul DM
Roland, Thomas P.
Daley, Tim J.
Loader, Neil J.
Street Perrott, F. Alayne
Rice, Emma M.
Pancotto, Veronica Andrea
Payne, Richard J.
author van Bellen, Simon
author_facet van Bellen, Simon
Mauquoy, Dmitri
Hughes, Paul DM
Roland, Thomas P.
Daley, Tim J.
Loader, Neil J.
Street Perrott, F. Alayne
Rice, Emma M.
Pancotto, Veronica Andrea
Payne, Richard J.
author_role author
author2 Mauquoy, Dmitri
Hughes, Paul DM
Roland, Thomas P.
Daley, Tim J.
Loader, Neil J.
Street Perrott, F. Alayne
Rice, Emma M.
Pancotto, Veronica Andrea
Payne, Richard J.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ASSULINA MUSCORUM
PALAEOSIG
PATAGONIA
SOUTHERN ANNULAR MODE
SOUTHERN WESTERLY WIND
UV-B
topic ASSULINA MUSCORUM
PALAEOSIG
PATAGONIA
SOUTHERN ANNULAR MODE
SOUTHERN WESTERLY WIND
UV-B
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The ombrotrophic peat bogs of Tierra del Fuego are located within the southern westerly wind belt (SWWB), which dominates climate variability in this region. We have reconstructed late-Holocene water-table depths from three peat bogs and aimed to relate these records to shifts in regional climate. Water-table depths were quantified by the analysis of testate amoeba assemblages, and a regional transfer function was used to infer past water-table depths. During the last 2000years, testate amoeba assemblages have been relatively stable, with a dominance of Difflugia pulex and Difflugia pristis type, and an increase in Assulina muscorum and other Euglyphida at the top of each section. Multivariate analyses show that water-table depth remained the main environmental variable explaining assemblages along the TiA12 core, but reconstructions were not significant for the two other cores. In line with the low variability in assemblages, water tables were relatively stable during the last 2000years. Slightly wetter conditions were found between ~1400 and 900 cal. BP and a pronounced recent dry shift was reconstructed in all of the three peat profiles. Considering the regional climatic context, this recent shift may have been forced by a decrease in precipitation and warmer conditions linked to an increase in the importance of the SWWB. Nevertheless, we cannot exclude the influence of higher UV-B radiation resulting from the local degradation of the ozone layer since the late 1970s, which may have had an additional effect on the relative presence of A. muscorum in the southern Patagonian region.
Fil: van Bellen, Simon . University Of Aberdeen; Reino Unido. Universite Du Quebec A Montreal; Canadá
Fil: Mauquoy, Dmitri . University Of Aberdeen; Reino Unido
Fil: Hughes, Paul DM. University Of Southampton; Reino Unido
Fil: Roland, Thomas P. . University Of Southampton; Reino Unido
Fil: Daley, Tim J. . Plymouth University; Reino Unido
Fil: Loader, Neil J. . Swansea University; Reino Unido
Fil: Street Perrott, F. Alayne. Swansea University; Reino Unido
Fil: Rice, Emma M.. Plymouth University; Reino Unido
Fil: Pancotto, Veronica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Payne, Richard J.. University Of York; Reino Unido
description The ombrotrophic peat bogs of Tierra del Fuego are located within the southern westerly wind belt (SWWB), which dominates climate variability in this region. We have reconstructed late-Holocene water-table depths from three peat bogs and aimed to relate these records to shifts in regional climate. Water-table depths were quantified by the analysis of testate amoeba assemblages, and a regional transfer function was used to infer past water-table depths. During the last 2000years, testate amoeba assemblages have been relatively stable, with a dominance of Difflugia pulex and Difflugia pristis type, and an increase in Assulina muscorum and other Euglyphida at the top of each section. Multivariate analyses show that water-table depth remained the main environmental variable explaining assemblages along the TiA12 core, but reconstructions were not significant for the two other cores. In line with the low variability in assemblages, water tables were relatively stable during the last 2000years. Slightly wetter conditions were found between ~1400 and 900 cal. BP and a pronounced recent dry shift was reconstructed in all of the three peat profiles. Considering the regional climatic context, this recent shift may have been forced by a decrease in precipitation and warmer conditions linked to an increase in the importance of the SWWB. Nevertheless, we cannot exclude the influence of higher UV-B radiation resulting from the local degradation of the ozone layer since the late 1970s, which may have had an additional effect on the relative presence of A. muscorum in the southern Patagonian region.
publishDate 2015
dc.date.none.fl_str_mv 2015-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/8712
van Bellen, Simon ; Mauquoy, Dmitri ; Hughes, Paul DM; Roland, Thomas P. ; Daley, Tim J. ; et al.; Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America; Sage Publications Ltd; Holocene (sevenoaks); 26; 3; 10-2015; 489-501
0959-6836
url http://hdl.handle.net/11336/8712
identifier_str_mv van Bellen, Simon ; Mauquoy, Dmitri ; Hughes, Paul DM; Roland, Thomas P. ; Daley, Tim J. ; et al.; Late-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South America; Sage Publications Ltd; Holocene (sevenoaks); 26; 3; 10-2015; 489-501
0959-6836
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683615609756
info:eu-repo/semantics/altIdentifier/url/http://hol.sagepub.com/content/26/3/489
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Sage Publications Ltd
publisher.none.fl_str_mv Sage Publications Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613227107844096
score 13.070432

Publicaciones similares