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Title of Journal: Plant Syst Evol

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Abbravation: Plant Systematics and Evolution

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Springer Vienna

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DOI

10.1007/bf00586364

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ISSN

1615-6110

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Ecological differentiation and cladogenesis of Em

Authors: Emanuela Agostinelli Jose Antonio Molina Cristina Pardo Donata Cafasso
Publish Date: 2010/11/21
Volume: 291, Issue: 3-4, Pages: 173-182
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Abstract

The Iberian Peninsula is home to a large number of endemic species that often show strong genetic subdivisions which indicate possible isolation of populations in the past Numerous phylogeographic and phylogenetic studies on Iberian flora and fauna have revealed this territory to be the origin of genetic differentiation during the Pleistocene Ice Age To better understand the influence of PlioPleistocene climatic oscillations on the cladogenesis and population structuring of refugial taxa restricted to freshwaters of the Iberian Peninsula we studied the evolutionary history of the small European genus Baldellia both from a phylogenetic/phylogeographic perspective and regarding its ecological characteristics Molecular analyses were based on four plastid regions and nuclear ITS2 ribosomal spacer from individuals belonging to geographically isolated Baldellia populations while the relationships between climate and Baldellia species distribution was investigated by redundancy analysis applied to the climatic data with the occurrence of Baldellia species as external variables The absence of a clear phylogenetic signal most likely reflects a common and recent cladogenesis for Baldellia In contrast the more rapidly evolving plastid sequences indicate a recent phylogeographic history of refugial repartition and ecological segregation probably occurring during the last glaciation a scenario well supported by marked differences in species’ ecological preferences and climate analysisThis work was funded partly with a grant provided by the Spanish Ministry of Education within the programme grants for university teachers We would like to thank Prof Salvatore Cozzolino from the University of Naples Italy for his expert advice Dr Chiara Settanni and Dr Davide Perroni for their valuable scientific advice and Dr Itziar López and Dr Carla Pinto Cruz for the loan of specimensBaldellia alpestris Coss Vasc Lav1 Lavater Lumbreras Spain MAF 168341 Baldellia alpestris Coss Vasc Cor6 Corconte Reinosa Spain MAF 168344 Baldellia alpestris Coss Vasc Qui8 Quintanar de la Sierra Neila Spain MAF 168336 Baldellia alpestris Coss Vasc Lug9• CoSPEIto Feira do Monte Lugo Spain MAF 160788 Baldellia alpestris Coss Vasc Pon11• Pontevedra A Estrada Spain MAF 151049 Baldellia alpestris Coss Vasc Bez12 Bezana Burgos Spain MAF 168343 Baldellia alpestris Coss Vasc Ebr13 Embalse rio Ebro Spain MAF 168340 Baldellia alpestris Coss Vasc Cer14 Cervera de Pisuerga Spain MAF 168338 Baldellia ranunculoides L Parl Nav2 Navalmoral de la Mata Cáceres Spain MAF Baldellia ranunculoides L Parl Lar3 Larache Marocco MAF 168339 Baldellia ranunculoides L Parl Sun4 Suni Sardinia Italy MAF 168337 Baldellia ranunculoides L Parl Bej5 Beja Portugal MAF 168342 Baldellia ranunculoides L Parl Huv7 Puntal de los Gonzales Huelva Spain MAF 168345 Baldellia ranunculoides L Parl Cla10• Clairmarais Pas de Calais France MAF 13989 Luronium natans L Raf Lnat Quintanar de la Sierra Sierra de Neila Spain MAF 168633

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