dc.contributor.author | Arrigo, Nils | |
dc.contributor.author | Therrien, James | |
dc.contributor.author | Anderson, Cajsa Lisa | |
dc.contributor.author | Windham, Michael D. | |
dc.contributor.author | Haufler, Christopher H. | |
dc.contributor.author | Barker, Michael S. | |
dc.date.accessioned | 2014-07-02T20:18:11Z | |
dc.date.available | 2014-07-02T20:18:11Z | |
dc.date.issued | 2013-08 | |
dc.identifier.citation | Nils Arrigo et al. (2013). A total evidence approach to understanding
phylogenetic relationships and ecological diversity in Selaginella subg.
Tetragonostachys. American Journal of Botany 100(8):1672-82
http://www.dx.doi.org/10.3732/ajb.1200426 | |
dc.identifier.uri | http://hdl.handle.net/1808/14459 | |
dc.description.abstract | • Premise of the Study: Several members of Selaginella are renowned for their ability to survive extreme drought and “resurrect”
when conditions improve. Many of these belong to subgenus Tetragonostachys , a group of ~45 species primarily found in
North and Central America, with substantial diversity in the Sonoran and Chihuahuan Deserts. We evaluated the monophyly
and the age of subgenus Tetragonostachys and assess how drought tolerance contributed to the evolution of this clade.
• Methods: Our study included most Tetragonostachys species, using plastid and nuclear sequences, fossil and herbarium records,
and climate variables to describe the species diversity, phylogenetic relationships, divergence times, and climatic niche
evolution in the subgenus.
• Key Results: We found that subgenus Tetragonostachys forms a monophyletic group sister to Selaginella lepidophylla and may
have diverged from other Selaginella because of a Gondwanan–Laurasian vicariance event ca. 240 mya. The North American
radiation of Tetragonostachys appears to be much more recent and to have occurred during the Early Cretaceous–late Paleocene
interval. We identifi ed two signifi cant and nested ecological niche shifts during the evolution of Tetragonostachys associated
with extreme drought tolerance and a more recent shift to cold climates. Our analyses suggest that drought tolerance
evolved in the warm deserts of southwest North America and may have been advantageous for colonization of cold and dry
boreal climates.
• Conclusions: Our investigation provides a foundation for future research addressing the genomics of ecological niche evolution
and the potential role of reticulate evolution in Selaginella subgenus Tetragonostachys . | |
dc.description.sponsorship | The authors thank P. Korall for sharing data. S. Buerki, N. Alvarez, and
B. Marazzi provided technical assistance and valuable comments on the manuscript. N.A. was funded by the Swiss National Science Foundation (grant no. PBNEP3-132747). C.L.A. was funded by the Swedish Research Council. | |
dc.publisher | Botanical Society of America | |
dc.subject | Ecological niche shift | |
dc.subject | Lycophyte | |
dc.subject | Ornstein-Uhlenbeck models | |
dc.subject | Selaginella | |
dc.subject | Sonoran Deser | |
dc.title | A Total Evidence Approach to Understanding Phylogenetic Relationships and Ecological Diversity in Selanginella subg. Tetragonostachys | |
dc.type | Article | |
kusw.kuauthor | Haufler, Christopher H. | |
kusw.kudepartment | Department of Geology | |
kusw.oastatus | na | |
dc.identifier.doi | 10.3732/ajb.1200426 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |