Impact of the climatic changes in the Pliocene-Pleistocene transition on Irano-Turanian species. The radiation of genus Jurinea (Compositae)
Herrando-Moraira, Sonia (Institut Botànic de Barcelona)
Roquet, Cristina (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Calleja, Juan Antonio (Research Centre on Biodiversity and Global Change. Departament of Biology)
Chen, You-Sheng (Chinese Academy of Sciences)
Fujikawa, Kazumi (Kochi Prefectural Makino Botanical Garden)
Galbany-Casals, Mercè (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Garcia-Jacas, Núria (Institut Botànic de Barcelona)
Liu, Jian-Quan (Key Sichuan University)
López-Alvarado, Javier (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
López-Pujol, Jordi (Universidad Espíritu Santo . Escuela de Ciencias Ambientales)
Mandel, Jennifer R. (University of Memphis. Department of Biological Sciences)
Mehregan, Iraj (Islamic Azad University. Department of Biology)
Sáez, Llorenç (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Sennikov, Alexander N. (Finnish Museum of Natural History)
Susanna, Alfonso (Institut Botànic de Barcelona)
Vilatersana, Roser (Institut Botànic de Barcelona)
Xu, Lian-Sheng (Chinese Academy of Sciences)

Data:	2023
Resum:	The Irano-Turanian region is one of the world's richest floristic regions and the centre of diversity for numerous xerophytic plant lineages. However, we still have limited knowledge on the timing of evolution and biogeographic history of its flora, and potential drivers of diversification remain underexplored. To fill this knowledge gap, we focus on the Eurasian genus Jurinea (ca. 200 species), one of the largest plant radiations that diversified in the region. We applied a macroevolutionary integrative approach to explicitly test diversification hypotheses and investigate the relative roles of geography vs. ecology and niche conservatism vs. niche lability in speciation processes. To do so, we gathered a sample comprising 77% of total genus richness and obtained data about (1) its phylogenetic history, recovering 502 nuclear loci sequences; (2) growth forms; (3) ecological niche, compiling data of 21 variables for more than 2500 occurrences; and (4) paleoclimatic conditions, to estimate climatic stability. Our results revealed that climate was a key factor in the evolutionary dynamics of Jurinea. The main diversification and biogeographic events that occurred during past climate changes, which led to colder and drier conditions, are the following: (1) the origin of the genus (10. 7 Ma); (2) long-distance dispersals from the Iranian Plateau to adjacent regions (∼7-4 Ma); and (3) the diversification shift during Pliocene-Pleistocene Transition (ca. 3 Ma), when net diversification rate almost doubled. Our results supported the pre-adaptation hypothesis, i. e. , the evolutionary success of Jurinea was linked to the retention of the ancestral niche adapted to aridity. Interestingly, the paleoclimatic analyses revealed that in the Iranian Plateau long-term climatic stability favoured old-lineage persistence, resulting in current high species richness of semi-arid and cold adapted clades; whereas moderate climate oscillations stimulated allopatric diversification in the lineages distributed in the Circumboreal region. In contrast, growth form lability and high niche disparity among closely related species in the Central Asian clade suggest adaptive radiation to mountain habitats. In sum, the radiation of Jurinea is the result of both adaptive and non-adaptive processes influenced by climatic, orogenic and ecological factors.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1116 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00315 Ministerio de Economía y Competitividad CGL2015-66703-P
Nota:	Altres ajuts: acords transformatius de la UAB
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Asteraceae ; Biogeography ; Diversification ; Hyb-seq ; Irano-Turanian region ; Phylogeny
Publicat a:	Molecular Phylogenetics and Evolution, Vol. 189 (December 2023) , art. 107928, ISSN 1095-9513

DOI: 10.1016/j.ympev.2023.107928

17 p, 12.5 MB

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