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Article: Early evolutionary history of the flowering plant family Annonaceae: Steady diversification and boreotropical geodispersal

TitleEarly evolutionary history of the flowering plant family Annonaceae: Steady diversification and boreotropical geodispersal
Authors
KeywordsBiogeographic Hypothesis Testing
Boreotropical Hypothesis
Diversification Rates
Indian Rafting
K/Pg Boundary
Ltt Plots
Molecular Dating
Museum Model
Issue Date2011
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/JBI
Citation
Journal Of Biogeography, 2011, v. 38 n. 4, p. 664-680 How to Cite?
AbstractAim Rain forest-restricted plant families show disjunct distributions between the three major tropical regions: South America, Africa and Asia. Explaining these disjunctions has become an important challenge in biogeography. The pantropical plant family Annonaceae is used to test hypotheses that might explain diversification and distribution patterns in tropical biota: the museum hypothesis (low extinction leading to steady accumulation of species); and dispersal between Africa and Asia via Indian rafting versus boreotropical geodispersal. Location Tropics and boreotropics. Methods Molecular age estimates were calculated using a Bayesian approach based on 83% generic sampling representing all major lineages within the family, seven chloroplast markers and two fossil calibrations. An analysis of diversification was carried out, which included lineage-through-time (LTT) plots and the calculation of diversification rates for genera and major clades. Ancestral areas were reconstructed using a maximum likelihood approach that implements the dispersal-extinction-cladogenesis model. Results The LTT plots indicated a constant overall rate of diversification with low extinction rates for the family during the first 80Ma of its existence. The highest diversification rates were inferred for several young genera such as Desmopsis, Uvariopsis and Unonopsis. A boreotropical migration route was supported over Indian rafting as the best fitting hypothesis to explain present-day distribution patterns within the family. Main conclusions Early diversification within Annonaceae fits the hypothesis of a museum model of tropical diversification, with an overall steady increase in lineages possibly due to low extinction rates. The present-day distribution of species within the two largest clades of Annonaceae is the result of two contrasting biogeographic histories. The 'long-branch clade' has been diversifying since the beginning of the Cenozoic and underwent numerous geodispersals via the boreotropics and several more recent long-distance dispersal events. In contrast, the 'short-branch clade' dispersed once into Asia via the boreotropics during the Early Miocene and further dispersal was limited. © 2010 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/179225
ISSN
2015 Impact Factor: 3.997
2015 SCImago Journal Rankings: 2.807
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCouvreur, TLPen_US
dc.contributor.authorPirie, MDen_US
dc.contributor.authorChatrou, LWen_US
dc.contributor.authorSaunders, RMKen_US
dc.contributor.authorSu, YCFen_US
dc.contributor.authorRichardson, JEen_US
dc.contributor.authorErkens, RHJen_US
dc.date.accessioned2012-12-19T09:53:12Z-
dc.date.available2012-12-19T09:53:12Z-
dc.date.issued2011en_US
dc.identifier.citationJournal Of Biogeography, 2011, v. 38 n. 4, p. 664-680en_US
dc.identifier.issn0305-0270en_US
dc.identifier.urihttp://hdl.handle.net/10722/179225-
dc.description.abstractAim Rain forest-restricted plant families show disjunct distributions between the three major tropical regions: South America, Africa and Asia. Explaining these disjunctions has become an important challenge in biogeography. The pantropical plant family Annonaceae is used to test hypotheses that might explain diversification and distribution patterns in tropical biota: the museum hypothesis (low extinction leading to steady accumulation of species); and dispersal between Africa and Asia via Indian rafting versus boreotropical geodispersal. Location Tropics and boreotropics. Methods Molecular age estimates were calculated using a Bayesian approach based on 83% generic sampling representing all major lineages within the family, seven chloroplast markers and two fossil calibrations. An analysis of diversification was carried out, which included lineage-through-time (LTT) plots and the calculation of diversification rates for genera and major clades. Ancestral areas were reconstructed using a maximum likelihood approach that implements the dispersal-extinction-cladogenesis model. Results The LTT plots indicated a constant overall rate of diversification with low extinction rates for the family during the first 80Ma of its existence. The highest diversification rates were inferred for several young genera such as Desmopsis, Uvariopsis and Unonopsis. A boreotropical migration route was supported over Indian rafting as the best fitting hypothesis to explain present-day distribution patterns within the family. Main conclusions Early diversification within Annonaceae fits the hypothesis of a museum model of tropical diversification, with an overall steady increase in lineages possibly due to low extinction rates. The present-day distribution of species within the two largest clades of Annonaceae is the result of two contrasting biogeographic histories. The 'long-branch clade' has been diversifying since the beginning of the Cenozoic and underwent numerous geodispersals via the boreotropics and several more recent long-distance dispersal events. In contrast, the 'short-branch clade' dispersed once into Asia via the boreotropics during the Early Miocene and further dispersal was limited. © 2010 Blackwell Publishing Ltd.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/JBIen_US
dc.relation.ispartofJournal of Biogeographyen_US
dc.subjectBiogeographic Hypothesis Testingen_US
dc.subjectBoreotropical Hypothesisen_US
dc.subjectDiversification Ratesen_US
dc.subjectIndian Raftingen_US
dc.subjectK/Pg Boundaryen_US
dc.subjectLtt Plotsen_US
dc.subjectMolecular Datingen_US
dc.subjectMuseum Modelen_US
dc.titleEarly evolutionary history of the flowering plant family Annonaceae: Steady diversification and boreotropical geodispersalen_US
dc.typeArticleen_US
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_US
dc.identifier.authoritySaunders, RMK=rp00774en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1365-2699.2010.02434.xen_US
dc.identifier.scopuseid_2-s2.0-79952677052en_US
dc.identifier.hkuros185282-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952677052&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume38en_US
dc.identifier.issue4en_US
dc.identifier.spage664en_US
dc.identifier.epage680en_US
dc.identifier.isiWOS:000288463000006-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridCouvreur, TLP=6508039499en_US
dc.identifier.scopusauthoridPirie, MD=23967103000en_US
dc.identifier.scopusauthoridChatrou, LW=6603262508en_US
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_US
dc.identifier.scopusauthoridSu, YCF=7404456219en_US
dc.identifier.scopusauthoridRichardson, JE=55463081100en_US
dc.identifier.scopusauthoridErkens, RHJ=12792303700en_US
dc.identifier.citeulike9038459-

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