Distribution models and a dated phylogeny for Chilean Oxalis species reveal occupation of new habitats by different lineages, not rapid adaptive radiation

Systematic Biology
Christoph Heibl, Susanne S Renner

Abstract

Among the World's most challenging environments for plant life is the Atacama Desert, an arid zone extending over 1300 km and from sea level to 2000/3000 m altitude along the southwestern Andean foothills. Plants there and in the adjacent Mediterranean zone exhibit striking adaptations, and we here address the question whether in a species-rich clade such adaptations arose in parallel, at different times, or simultaneously. Answering this type of question has been a major concern of evolutionary biology over the past few years, with a growing consensus that lineages tend to be conservative in their vegetative traits and niche requirements. Combined nuclear and chloroplast DNA sequences for 112 species of Oxalidales (4900 aligned nucleotides) were used for a fossil-calibrated phylogeny that includes 43 of the 54 species of Chilean Oxalis, and species distribution models (SDMs) incorporating precipitation, temperature, and fog, and the phylogeny were used to reconstruct ancestral habitat preferences, relying on likelihood and Bayesian techniques. Since uneven collecting can reduce the power of SDMs, we compared 3 strategies to correct for collecting effort. Unexpectedly, the Oxalis flora of Chile consists of 7 distant lineages th...Continue Reading

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Citations

Jun 27, 2013·Proceedings of the National Academy of Sciences of the United States of America·Pablo C GuerreroJohn J Wiens
May 18, 2016·AoB Plants·Santiago Morello, Silvana M Sede
Aug 24, 2016·Annals of Botany·Rafael Rubio de CasasDouglas E Soltis
Jan 22, 2014·The New Phytologist·Yohan PillonElizabeth A Stacy
Feb 21, 2019·PeerJ·Quentin J GroomIvan Hoste
Jul 19, 2018·Frontiers in Plant Science·Philip W RundelPablo Vargas
Jun 13, 2020·Horticulture Research·Shasha WuZhong-Jian Liu
Feb 14, 2021·American Journal of Botany·Felix F MerklingerFederico Luebert
Jun 2, 2021·Horticulture Research·Shasha WuZhong-Jian Liu

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