دورية أكاديمية
Caught in the Act: Incipient Speciation at the Southern limit of Viburnum in the Central Andes.
| العنوان: | Caught in the Act: Incipient Speciation at the Southern limit of Viburnum in the Central Andes. |
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| المؤلفون: | Maya-Lastra CA; Department of Ecology and Evolutionary Biology, Yale University, PO Box 208106, New Haven, CT, USA.; Department of Biology, Angelo State University, San Angelo, TX, USA, New Haven, CT, USA., Sweeney PW; Division of Botany, Peabody Museum of Natural History, Yale University, New Haven, CT, USA., Eaton DAR; Department of Ecology, Evolution & Environmental Biology, Columbia University, New York, NY, USA., Torrez V; Herbario Nacional de Bolivia, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz, Bolivia., Maldonado C; Herbario Nacional de Bolivia, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz, Bolivia., Ore-Rengifo MI; Department of Biology, University of Florida, Gainesville, FL, USA., Arakaki M; Museo de Historia Natural & Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima, Peru., Donoghue MJ; Department of Ecology and Evolutionary Biology, Yale University, PO Box 208106, New Haven, CT, USA., Edwards EJ; Department of Ecology and Evolutionary Biology, Yale University, PO Box 208106, New Haven, CT, USA. |
| المصدر: | Systematic biology [Syst Biol] 2024 Jun 04. Date of Electronic Publication: 2024 Jun 04. |
| Publication Model: | Ahead of Print |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Oxford University Press Country of Publication: England NLM ID: 9302532 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1076-836X (Electronic) Linking ISSN: 10635157 NLM ISO Abbreviation: Syst Biol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2009- : Oxford : Oxford University Press Original Publication: Washington, D.C., USA : Society of Systematic Biologists, [1992- |
| مستخلص: | A fundamental objective of evolutionary biology is to understand the origin of independently evolving species. Phylogenetic studies of species radiations rarely are able to document ongoing speciation; instead, modes of speciation, entailing geographic separation and/or ecological differentiation, are posited retrospectively. The Oreinotinus clade of Viburnum has radiated recently from north to south through the cloud forests of Mexico and Central America to the Central Andes. Our analyses support a hypothesis of incipient speciation in Oreinotinus at the southern edge of its geographic range, from central Peru to northern Argentina. Although several species and infraspecific taxa of have been recognized in this area, multiple lines of evidence and analytical approaches (including analyses of phylogenetic relationships, genetic structure, leaf morphology, and climatic envelopes) favor the recognition of just a single species, V. seemenii. We show that what has previously been recognized as V. seemenii f. minor has recently occupied the drier Tucuman-Bolivian forest region from Samaipata in Bolivia to Salta in northern Argentina. Plants in these populations form a well-supported clade with a distinctive genetic signature and they have evolved smaller, narrower leaves. We interpret this as the beginning of a within-species divergence process that has elsewhere in the neotropics resulted repeatedly in Viburnum species with a particular set of leaf ecomorphs. Specifically, the southern populations are in the process of evolving the small, glabrous, and entire leaf ecomorph that has evolved in four other montane areas of endemism. As predicted based on our studies of leaf ecomorphs in Chiapas, Mexico, these southern populations experience generally drier conditions, with large diurnal temperature fluctuations. In a central portion of the range of V. seemenii, characterized by wetter climatic conditions, we also document what may be the initial differentiation of the leaf ecomorph with larger, pubescent, and toothy leaves. The emergence of these ecomorphs thus appears to be driven by adaptation to subtly different climatic conditions in separate geographic regions, as opposed to parapatric differentiation along elevational gradients as suggested by Viburnum species distributions in other parts of the neotropics. (© The Author(s) 2024. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.) |
| فهرسة مساهمة: | Keywords: Oreinotinus; Andes; Tucuman-Bolivian Forest; Yungas ecoregion; leaf ecomorphs; neotropical cloud forest; speciation |
| تواريخ الأحداث: | Date Created: 20240604 Latest Revision: 20240604 |
| رمز التحديث: | 20240604 |
| DOI: | 10.1093/sysbio/syae023 |
| PMID: | 38832843 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1076-836X |
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| DOI: | 10.1093/sysbio/syae023 |