To move or to evolve: contrasting patterns of intercontinental connectivity and climatic niche evolution in "Terebinthaceae"

dc.contributor.authorWeeks, Andrea
dc.contributor.authorZapata, Felipe
dc.contributor.authorPell, Susan K.
dc.contributor.authorDaly, Douglas C.
dc.contributor.authorMitchell, John D.
dc.contributor.authorFine, Paul V. A.
dc.description.abstractMany angiosperm families are distributed pantropically, yet for any given continent little is known about which lineages are ancient residents or recent arrivals. Here we use a comprehensive sampling of the pantropical sister pair Anacardiaceae and Burseraceae to assess the relative importance of continental vicariance, long-distance dispersal and niche-conservatism in generating its distinctive pattern of diversity over time. Each family has approximately the same number of species and identical stem age, yet Anacardiaceae display a broader range of fruit morphologies and dispersal strategies and include species that can withstand freezing temperatures, whereas Burseraceae do not. We found that nuclear and chloroplast data yielded a highly supported phylogenetic reconstruction that supports current taxonomic concepts and time-calibrated biogeographic reconstructions that are broadly congruent with the fossil record. We conclude that the most recent common ancestor of these families was widespread and likely distributed in the Northern Hemisphere during the Cretaceous and that vicariance between Eastern and Western Hemispheres coincided with the initial divergence of the families. The tempo of diversification of the families is strikingly different. Anacardiaceae steadily accumulated lineages starting in the Late Cretaceous–Paleocene while the majority of Burseraceae diversification occurred in the Miocene. Multiple dispersal- and vicariance-based intercontinental colonization events are inferred for both families throughout the past 100 million years. However, Anacardiaceae have shifted climatic niches frequently during this time, while Burseraceae have experienced very few shifts between dry and wet climates and only in the tropics. Thus, we conclude that both Anacardiaceae and Burseraceae move easily but that Anacardiaceae have adapted more often, either due to more varied selective pressures or greater intrinsic lability.
dc.description.sponsorshipResearch presented was funded by: NSF DEB awards 0919179 to Weeks, 0919567 to Fine, 0918600 to Daly and Mitchell, and 0919485 to Pell; the Thomas and Kate Jeffress Memorial Foundation (Weeks), Conservation International (Pell), and the Beneficia Foundation (Pell). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or our other sponsors. Analyses were conducted with computational resources and services at the Center for Computation and Visualization at Brown University, supported in part by NSF EPSCoR EPS-1004057 and the State of Rhode Island. Publication of this article was funded in part by the George Mason University Libraries Open Access Publishing Fund
dc.identifier.citationWeeks A, Zapata F, Pell SK, Daly DC, Mitchell JD and Fine PVA (2014) To move or to evolve: contrasting patterns of intercontinental connectivity and climatic niche evolution in “Terebinthaceae” (Anacardiaceae and Burseraceae). Front. Genet. 5:409. doi: 10.3389/fgene.2014.00409
dc.publisherFrontiers Media
dc.rightsAttribution 3.0 United States
dc.subjectBiome shifts
dc.subjectContinental vicariance
dc.subjectLong-distance dispersal
dc.subjectPhylogenetic niche conservatism
dc.titleTo move or to evolve: contrasting patterns of intercontinental connectivity and climatic niche evolution in "Terebinthaceae"


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