An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms

Pollen and diatom analyses have been carried out in a 490-cm long core collected from Laguna Lucenza (1420 m a.s.l.; northwest Iberian Peninsula), spanning the last 10,000 yr. Pollen analyses show a decrease in deciduous Quercus pollen percentages and total pollen concentration after radiocarbon dat...

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Detalles Bibliográficos
Autores: Leira Campos, Antón Manoel, Santos, Luisa
Tipo de recurso: artículo
Fecha de publicación:2002
País:España
Institución:Universidad de Santiago de Compostela (USC)
Repositorio:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglés
OAI Identifier:oai:minerva.usc.gal:10347/32774
Acceso en línea:http://hdl.handle.net/10347/32774
Access Level:acceso abierto
Palabra clave:241704 Limnología
250205 Paleoclimatología
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spelling An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatomsLeira Campos, Antón ManoelSantos, Luisa241704 Limnología250205 PaleoclimatologíaPollen and diatom analyses have been carried out in a 490-cm long core collected from Laguna Lucenza (1420 m a.s.l.; northwest Iberian Peninsula), spanning the last 10,000 yr. Pollen analyses show a decrease in deciduous Quercus pollen percentages and total pollen concentration after radiocarbon date 8350±80 yr BP. The estimated age by linear interpolation for the peak of this event is about 9200 cal yr BP. Diatom analyses have been carried out using the same samples in order to obtain complementary information about past environmental conditions within the water body. Pollen and diatom records show a response to changes in the palaeoenvironmental conditions. Diatom concentrations are relatively low, indicating low productivity within the lake. Fragilaria species are dominant and Fragilaria exigua is notably more abundant than during previous periods. These changes in the diatom community reflect a decrease in lake pH. This would be consistent with longer periods of ice cover and cold conditions in the lake at this time. We interpret this episode as a response to climatic change probably due to climatic deterioration. This interval coincides, at least in part, with an episode of abrupt and short widespread climate change lasting from 9000 to 8000 yr BP.ElsevierUniversidade de Santiago de Compostela. Facultade de Bioloxía20022002-01-0120022002-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10347/32774reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:minerva.usc.gal:10347/327742026-06-15T12:47:27Z
dc.title.none.fl_str_mv An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
title An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
spellingShingle An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
Leira Campos, Antón Manoel
241704 Limnología
250205 Paleoclimatología
title_short An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
title_full An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
title_fullStr An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
title_full_unstemmed An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
title_sort An early Holocene short climatic event in the northwest Iberian Peninsula inferred from pollen and diatoms
dc.creator.none.fl_str_mv Leira Campos, Antón Manoel
Santos, Luisa
author Leira Campos, Antón Manoel
author_facet Leira Campos, Antón Manoel
Santos, Luisa
author_role author
author2 Santos, Luisa
author2_role author
dc.contributor.none.fl_str_mv Universidade de Santiago de Compostela. Facultade de Bioloxía
dc.subject.none.fl_str_mv 241704 Limnología
250205 Paleoclimatología
topic 241704 Limnología
250205 Paleoclimatología
description Pollen and diatom analyses have been carried out in a 490-cm long core collected from Laguna Lucenza (1420 m a.s.l.; northwest Iberian Peninsula), spanning the last 10,000 yr. Pollen analyses show a decrease in deciduous Quercus pollen percentages and total pollen concentration after radiocarbon date 8350±80 yr BP. The estimated age by linear interpolation for the peak of this event is about 9200 cal yr BP. Diatom analyses have been carried out using the same samples in order to obtain complementary information about past environmental conditions within the water body. Pollen and diatom records show a response to changes in the palaeoenvironmental conditions. Diatom concentrations are relatively low, indicating low productivity within the lake. Fragilaria species are dominant and Fragilaria exigua is notably more abundant than during previous periods. These changes in the diatom community reflect a decrease in lake pH. This would be consistent with longer periods of ice cover and cold conditions in the lake at this time. We interpret this episode as a response to climatic change probably due to climatic deterioration. This interval coincides, at least in part, with an episode of abrupt and short widespread climate change lasting from 9000 to 8000 yr BP.
publishDate 2002
dc.date.none.fl_str_mv 2002
2002-01-01
2002
2002-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10347/32774
url http://hdl.handle.net/10347/32774
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
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
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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