Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)

We investigate Lake Estanya's diatom and pollen records from the Late Glacial (LG) to the Early Holocene (EH), in order to compare limnological and vegetation responses to common climate forcing. The biotic changes recognized in this study largely agree with the hydrological evolution of the la...

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Autores: Vegas Vilarrúbia, Teresa Elena, Gonzáles-Sanpériz, P., Morellón, Mario, Gil-Romera, G, Pérez-Sanz, A., Valero Garcés, Blas Lorenzo
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/124935
Acesso em linha:https://hdl.handle.net/2445/124935
Access Level:acceso abierto
Palavra-chave:Diatomees
Canvi climàtic
Plantes aquàtiques
Pirineus
Diatoms
Climatic change
Aquatic plants
Pyrenees
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oai_identifier_str oai:recercat.cat:2445/124935
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repository_id_str
spelling Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)Vegas Vilarrúbia, Teresa ElenaGonzáles-Sanpériz, P.Morellón, MarioGil-Romera, GPérez-Sanz, A.Valero Garcés, Blas LorenzoDiatomeesCanvi climàticPlantes aquàtiquesPirineusDiatomsClimatic changeAquatic plantsPyreneesWe investigate Lake Estanya's diatom and pollen records from the Late Glacial (LG) to the Early Holocene (EH), in order to compare limnological and vegetation responses to common climate forcing. The biotic changes recognized in this study largely agree with the hydrological evolution of the lake described previously for the same period. The diatom record shows high sensitivity to fluctuations in both lake level and salinity concentration as consequence of climate shifts. In addition vegetation results indicate that the area could have played an important role as regional vegetation refuge. Shallow lake conditions during the Last Glacial Maximum (LGM) were punctuated by relatively deeper freshwaters between 19.3 and 18.6 cal kyr BP and at 18.0 cal kyr BP, as recorded by diatom shifts. A subsequent increasing aridity trend, coinciding with the Mystery Interval (MI), affected the diatom accumulation rates, which dropped to its minimum values between 17.2 to 14.7 cal kyr BP. Particularly dry and cold conditions during the LGM and MI are supported by the largest values of steppic pollen taxa of the whole sequence, which account for up to 40%. However, relatively high values of Betula during the Heinrich Event 1 suggest a plausible regional vegetation refuge. Abrupt cooling and warming episodes within the LG triggered remarkable ecological threshold crossings in the diatom communities, especially during the stadial/interstadial episodes. At this point, the vegetation reflect the onset of warm conditions during the Bølling/Allerød with the partial substitution of Betula by Marcescent and Evergreen Quercus, what probably indicates the arrival of temperate taxa to the area and the likely migration of birch to higher altitudes. The Younger Dryas Stadial shows a complex ecological response. Diatoms are very poorly preserved, but aquatic taxa reach their highest values. An increase in Marcescent Quercus during this cold stage lends further support to the hypothesis that this is a regional vegetation refuge. Low lake levels recorded during the EH affected the development and preservation of diatom communities. A delay in the onset of humid conditions for the EH is also supported by the vegetation composition, characterized by the maximum expansion of Juniperus.Elsevier B.V.2018201820132018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion15 p.application/pdfhttps://hdl.handle.net/2445/124935Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.palaeo.2013.09.011Palaeogeography Palaeoclimatology Palaeoecology, 2013, vol. 392, p. 335-349https://doi.org/10.1016/j.palaeo.2013.09.011(c) Elsevier B.V., 2013info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1249352026-05-29T05:05:01Z
dc.title.none.fl_str_mv Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
title Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
spellingShingle Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
Vegas Vilarrúbia, Teresa Elena
Diatomees
Canvi climàtic
Plantes aquàtiques
Pirineus
Diatoms
Climatic change
Aquatic plants
Pyrenees
title_short Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
title_full Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
title_fullStr Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
title_full_unstemmed Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
title_sort Diatom and vegetation responses to Late Glacial and Early Holocene climate changes at Lake Estanya (Southern Pyrenees, NE Spain)
dc.creator.none.fl_str_mv Vegas Vilarrúbia, Teresa Elena
Gonzáles-Sanpériz, P.
Morellón, Mario
Gil-Romera, G
Pérez-Sanz, A.
Valero Garcés, Blas Lorenzo
author Vegas Vilarrúbia, Teresa Elena
author_facet Vegas Vilarrúbia, Teresa Elena
Gonzáles-Sanpériz, P.
Morellón, Mario
Gil-Romera, G
Pérez-Sanz, A.
Valero Garcés, Blas Lorenzo
author_role author
author2 Gonzáles-Sanpériz, P.
Morellón, Mario
Gil-Romera, G
Pérez-Sanz, A.
Valero Garcés, Blas Lorenzo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Diatomees
Canvi climàtic
Plantes aquàtiques
Pirineus
Diatoms
Climatic change
Aquatic plants
Pyrenees
topic Diatomees
Canvi climàtic
Plantes aquàtiques
Pirineus
Diatoms
Climatic change
Aquatic plants
Pyrenees
description We investigate Lake Estanya's diatom and pollen records from the Late Glacial (LG) to the Early Holocene (EH), in order to compare limnological and vegetation responses to common climate forcing. The biotic changes recognized in this study largely agree with the hydrological evolution of the lake described previously for the same period. The diatom record shows high sensitivity to fluctuations in both lake level and salinity concentration as consequence of climate shifts. In addition vegetation results indicate that the area could have played an important role as regional vegetation refuge. Shallow lake conditions during the Last Glacial Maximum (LGM) were punctuated by relatively deeper freshwaters between 19.3 and 18.6 cal kyr BP and at 18.0 cal kyr BP, as recorded by diatom shifts. A subsequent increasing aridity trend, coinciding with the Mystery Interval (MI), affected the diatom accumulation rates, which dropped to its minimum values between 17.2 to 14.7 cal kyr BP. Particularly dry and cold conditions during the LGM and MI are supported by the largest values of steppic pollen taxa of the whole sequence, which account for up to 40%. However, relatively high values of Betula during the Heinrich Event 1 suggest a plausible regional vegetation refuge. Abrupt cooling and warming episodes within the LG triggered remarkable ecological threshold crossings in the diatom communities, especially during the stadial/interstadial episodes. At this point, the vegetation reflect the onset of warm conditions during the Bølling/Allerød with the partial substitution of Betula by Marcescent and Evergreen Quercus, what probably indicates the arrival of temperate taxa to the area and the likely migration of birch to higher altitudes. The Younger Dryas Stadial shows a complex ecological response. Diatoms are very poorly preserved, but aquatic taxa reach their highest values. An increase in Marcescent Quercus during this cold stage lends further support to the hypothesis that this is a regional vegetation refuge. Low lake levels recorded during the EH affected the development and preservation of diatom communities. A delay in the onset of humid conditions for the EH is also supported by the vegetation composition, characterized by the maximum expansion of Juniperus.
publishDate 2013
dc.date.none.fl_str_mv 2013
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/124935
url https://hdl.handle.net/2445/124935
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.palaeo.2013.09.011
Palaeogeography Palaeoclimatology Palaeoecology, 2013, vol. 392, p. 335-349
https://doi.org/10.1016/j.palaeo.2013.09.011
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2013
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2013
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 15 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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