Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia

20 p., 6 fig.

Detalles Bibliográficos
Autores: Montoya, Encarnación, Rull, Valentí, Stansell, Nathan D., Abbott, Mark B., Nogué, Sandra, Bird, Broxton W., Díaz, Wilmer A.
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::128a6828cac613d718beaea8d037d210
Acceso en línea:http://hdl.handle.net/10261/72582
Access Level:acceso abierto
Palabra clave:Fire
Gran Sabana
Human occupation
Last millennia
Charcoal
Mauritia
Neotropics
Paleoecology
Vegetation change
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spelling Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millenniaMontoya, EncarnaciónRull, ValentíStansell, Nathan D.Abbott, Mark B.Nogué, SandraBird, Broxton W.Díaz, Wilmer A.FireGran SabanaHuman occupationLast millenniaCharcoalMauritiaNeotropicsPaleoecologyVegetation change20 p., 6 fig.The southern Gran Sabana (SE Venezuela) holds a particular type of neotropical savanna characterized by the local occurrence of morichales (Mauritia palmswamps), in a climate apparentlymore suitable for rain forests. We present a paleoecological analysis of the last millennia of Lake Chonita (4°39′N–61°0′W, 884m elevation), based on biological and physico-chemical proxies. Savannas dominated the region during the last millennia, but a significant vegetation replacement occurred in recent times. The site was covered by a treeless savanna with nearby rainforests from 3640 to 2180 cal yr BP. Water levels were higher than today until about 2800 cal yr BP. Forests retreated since about 2180 cal yr BP onwards, likely influenced by a higher fire incidence that facilitated a dramatic expansion of morichales. The simultaneous appearance of charcoal particles and Mauritia pollen around 2000 cal yr BP supports the potential pyrophilous nature of this palm and the importance of fire for its recent expansion. The whole picture suggests human settlements similar to today – in which fire is an essential element – since around 2000 yr ago. Therefore, present-day southern Gran Sabana landscapes seem to have been the result of the synergy between biogeographical, climatic and anthropogenic factors, mostly fire.This work was supported by Spanish Ministry of Science and Innovation (former Ministry of Education and Science), projects CGL2006-00974 and CGL2009-07069/BOS to V. Rull, and grant BES-2007-16308 to E. Montoya. Permits to develop the research in Venezuela were provided by the Ministry of Science and Technology (DM/0000013, 5 Jan 2007), and sampling permits were provided by the Ministry of Environment (nº IE-085, 9 Feb 2007).Peer reviewedAcademic Press201320132011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/72582reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.yqres.2011.06.014info:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::128a6828cac613d718beaea8d037d2102026-05-22T06:33:51Z
dc.title.none.fl_str_mv Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
title Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
spellingShingle Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
Montoya, Encarnación
Fire
Gran Sabana
Human occupation
Last millennia
Charcoal
Mauritia
Neotropics
Paleoecology
Vegetation change
title_short Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
title_full Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
title_fullStr Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
title_full_unstemmed Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
title_sort Forest–savanna–morichal dynamics in relation to fire and human occupation in the southern Gran Sabana (SE Venezuela) during the last millennia
dc.creator.none.fl_str_mv Montoya, Encarnación
Rull, Valentí
Stansell, Nathan D.
Abbott, Mark B.
Nogué, Sandra
Bird, Broxton W.
Díaz, Wilmer A.
author Montoya, Encarnación
author_facet Montoya, Encarnación
Rull, Valentí
Stansell, Nathan D.
Abbott, Mark B.
Nogué, Sandra
Bird, Broxton W.
Díaz, Wilmer A.
author_role author
author2 Rull, Valentí
Stansell, Nathan D.
Abbott, Mark B.
Nogué, Sandra
Bird, Broxton W.
Díaz, Wilmer A.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Fire
Gran Sabana
Human occupation
Last millennia
Charcoal
Mauritia
Neotropics
Paleoecology
Vegetation change
topic Fire
Gran Sabana
Human occupation
Last millennia
Charcoal
Mauritia
Neotropics
Paleoecology
Vegetation change
description 20 p., 6 fig.
publishDate 2011
dc.date.none.fl_str_mv 2011
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/72582
url http://hdl.handle.net/10261/72582
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.yqres.2011.06.014
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Academic Press
publisher.none.fl_str_mv Academic Press
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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score 15,198674

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