Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming

[EN] The Quaternary paleoclimatic trends documented for the Northern Hemisphere also affected the neotropical region, and contributed to the shaping of its present-day biodiversity patterns. DNA molecular-clock studies on extant neotropical species have recorded a significant acceleration of speciat...

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Detalhes bibliográficos
Autores: Rull, Valentí, Vegas-Vilarrúbia, Teresa, Nogué, Sandra, Montoya, Encarnación, Cañellas-Boltà, Núria, Lara, Arantzazu
Tipo de documento: artigo
Data de publicação:2007
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/29762
Acesso em linha:http://hdl.handle.net/10261/29762
Access Level:Acceso aberto
Palavra-chave:Paleoecology
Paleoclimatology
Quaternary
Biodiversity
Neotropics
Paleoecologia
Paleoclimatologia
Quaternari
Biodiversitat
Neotròpic
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spelling Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warmingRull, ValentíVegas-Vilarrúbia, TeresaNogué, SandraMontoya, EncarnaciónCañellas-Boltà, NúriaLara, ArantzazuPaleoecologyPaleoclimatologyQuaternaryBiodiversityNeotropicsPaleoecologiaPaleoclimatologiaQuaternariBiodiversitatNeotròpic[EN] The Quaternary paleoclimatic trends documented for the Northern Hemisphere also affected the neotropical region, and contributed to the shaping of its present-day biodiversity patterns. DNA molecular-clock studies on extant neotropical species have recorded a significant acceleration of speciation rates in the last 5 million years (my), coinciding with a marked Plio-Pleistocene global cooling. Furthermore, around half of the species studied originated during the last 2.6 my, in the frame of Pleistocene glaciations. The refuge hypothesis is considered inadequate for the Neotropics, and alternative diversification mechanisms linked to climate change are discussed herein. Among them, recurrent vertical migrations controlled by alternating glacial/interglacial climates, and the resulting connection and disconnection of lowland and highland biotas, have been considered important speciation factors. A significant number of endemic taxa from the neotropical highlands is potentially threatened of extinction by habitat loss/fragmentation, due to the global warming predicted by the end of the present century.[CAT] Els canvis climàtics quaternaris enregistrats a l’hemisferi nord també han afectat la regió neotropical i han contribuït a definirne els patrons actuals de biodiversitat. Els estudis moleculars de DNA que s’han dut a terme en espècies neotropicals actuals mostren una acceleració significativa de les taxes d’especiació en els darrers 5 milions d’anys, fet que coincideix amb un refredament global durant el Pliopleistocè. A més, prop de la meitat de les espècies estudiades han aparegut durant els darrers 2,6 milions d’anys, en el marc de les glaciacions pleistocenes. La hipòtesi dels refugis es considera poc adequada pel Neotròpic i es proposen mecanismes alternatius de diversificació associats als canvis climàtics. Entre aquests, les migracions biòtiques verticals controlades per l’alternança climàtica glacial/interglacial, i les consegüents connexió i desconnexió de les biotes de terres altes i baixes, s’han considerat factors importants d’especiació. Un nombre important d’espècies endèmiques de les terres altes neotropicals estan potencialment amenaçades d’extinció per la pèrdua o fragmentació de l’hàbitat, com a conseqüència de l’escalfament global que es pronostica per a la fi de segle.Peer reviewedInstitut d'Estudis Catalans201020102007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/29762reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés10.2436/20.7010.01.17info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/297622026-05-22T06:33:51Z
dc.title.none.fl_str_mv Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
title Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
spellingShingle Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
Rull, Valentí
Paleoecology
Paleoclimatology
Quaternary
Biodiversity
Neotropics
Paleoecologia
Paleoclimatologia
Quaternari
Biodiversitat
Neotròpic
title_short Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
title_full Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
title_fullStr Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
title_full_unstemmed Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
title_sort Quaternary paleoclimatology, neotropical biodiversity, and potential effects of global warming
dc.creator.none.fl_str_mv Rull, Valentí
Vegas-Vilarrúbia, Teresa
Nogué, Sandra
Montoya, Encarnación
Cañellas-Boltà, Núria
Lara, Arantzazu
author Rull, Valentí
author_facet Rull, Valentí
Vegas-Vilarrúbia, Teresa
Nogué, Sandra
Montoya, Encarnación
Cañellas-Boltà, Núria
Lara, Arantzazu
author_role author
author2 Vegas-Vilarrúbia, Teresa
Nogué, Sandra
Montoya, Encarnación
Cañellas-Boltà, Núria
Lara, Arantzazu
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Paleoecology
Paleoclimatology
Quaternary
Biodiversity
Neotropics
Paleoecologia
Paleoclimatologia
Quaternari
Biodiversitat
Neotròpic
topic Paleoecology
Paleoclimatology
Quaternary
Biodiversity
Neotropics
Paleoecologia
Paleoclimatologia
Quaternari
Biodiversitat
Neotròpic
description [EN] The Quaternary paleoclimatic trends documented for the Northern Hemisphere also affected the neotropical region, and contributed to the shaping of its present-day biodiversity patterns. DNA molecular-clock studies on extant neotropical species have recorded a significant acceleration of speciation rates in the last 5 million years (my), coinciding with a marked Plio-Pleistocene global cooling. Furthermore, around half of the species studied originated during the last 2.6 my, in the frame of Pleistocene glaciations. The refuge hypothesis is considered inadequate for the Neotropics, and alternative diversification mechanisms linked to climate change are discussed herein. Among them, recurrent vertical migrations controlled by alternating glacial/interglacial climates, and the resulting connection and disconnection of lowland and highland biotas, have been considered important speciation factors. A significant number of endemic taxa from the neotropical highlands is potentially threatened of extinction by habitat loss/fragmentation, due to the global warming predicted by the end of the present century.
publishDate 2007
dc.date.none.fl_str_mv 2007
2010
2010
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/10261/29762
url http://hdl.handle.net/10261/29762
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv 10.2436/20.7010.01.17
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institut d'Estudis Catalans
publisher.none.fl_str_mv Institut d'Estudis Catalans
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
_version_ 1869414258024906752
score 15,81155

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