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Nested radiations and the pulse of angiosperm diversification: increased diversification rates often follow whole genome duplications.
. 2015 Jul; 207(2):454-467.

Abstract

Our growing understanding of the plant tree of life provides a novel opportunity to uncover the major drivers of angiosperm diversity. Using a time-calibrated phylogeny, we characterized hot and cold spots of lineage diversification across the angiosperm tree of life by modeling evolutionary diversification using stepwise AIC (MEDUSA). We also tested the whole-genome duplication (WGD) radiation lag-time model, which postulates that increases in diversification tend to lag behind established WGD events. Diversification rates have been incredibly heterogeneous throughout the evolutionary history of angiosperms and reveal a pattern of 'nested radiations' - increases in net diversification nested within other radiations. This pattern in turn generates a negative relationship between clade age and diversity across both families and orders. We suggest that stochastically changing diversification rates across the phylogeny explain these patterns. Finally, we demonstrate significant statistical support for the WGD radiation lag-time model. Across angiosperms, nested shifts in diversification led to an overall increasing rate of net diversification and declining relative extinction rates through time. These diversification shifts are only rarely perfectly associated with WGD events, but commonly follow them after a lag period.

Authors+Show Affiliations

Department of Biological Sciences, University of Idaho, Moscow, ID, 83844, USA. Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, 83844, USA.Department of Biological Sciences, University of Idaho, Moscow, ID, 83844, USA. Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, 83844, USA.Department of Biological Sciences, University of Idaho, Moscow, ID, 83844, USA. Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, 83844, USA.Florida Museum of Natural History, University of Florida, Gainesville, FL, 32611, USA.Florida Museum of Natural History, University of Florida, Gainesville, FL, 32611, USA. Department of Biology, University of Florida, Gainesville, FL, 32611, USA.Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, 48109, USA.Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, 48109, USA.Department of Biology, University of Florida, Gainesville, FL, 32611, USA.Department of Biological Sciences, University of Idaho, Moscow, ID, 83844, USA. Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, 83844, USA.

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26053261

Citation

Tank, David C., et al. "Nested Radiations and the Pulse of Angiosperm Diversification: Increased Diversification Rates Often Follow Whole Genome Duplications." The New Phytologist, vol. 207, no. 2, 2015, pp. 454-467.
Tank DC, Eastman JM, Pennell MW, et al. Nested radiations and the pulse of angiosperm diversification: increased diversification rates often follow whole genome duplications. New Phytol. 2015;207(2):454-467.
Tank, D. C., Eastman, J. M., Pennell, M. W., Soltis, P. S., Soltis, D. E., Hinchliff, C. E., Brown, J. W., Sessa, E. B., & Harmon, L. J. (2015). Nested radiations and the pulse of angiosperm diversification: increased diversification rates often follow whole genome duplications. The New Phytologist, 207(2), 454-467. https://doi.org/10.1111/nph.13491
Tank DC, et al. Nested Radiations and the Pulse of Angiosperm Diversification: Increased Diversification Rates Often Follow Whole Genome Duplications. New Phytol. 2015;207(2):454-467. PubMed PMID: 26053261.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nested radiations and the pulse of angiosperm diversification: increased diversification rates often follow whole genome duplications. AU - Tank,David C, AU - Eastman,Jonathan M, AU - Pennell,Matthew W, AU - Soltis,Pamela S, AU - Soltis,Douglas E, AU - Hinchliff,Cody E, AU - Brown,Joseph W, AU - Sessa,Emily B, AU - Harmon,Luke J, Y1 - 2015/06/04/ PY - 2014/08/10/received PY - 2015/05/01/accepted PY - 2015/6/9/entrez PY - 2015/6/9/pubmed PY - 2016/3/22/medline KW - angiosperm diversification rates KW - clade age and diversity KW - modeling evolutionary diversification using stepwise AIC (MEDUSA) KW - nested radiations KW - polyploidy KW - whole-genome duplication radiation lag-time model SP - 454 EP - 467 JF - The New phytologist JO - New Phytol. VL - 207 IS - 2 N2 - Our growing understanding of the plant tree of life provides a novel opportunity to uncover the major drivers of angiosperm diversity. Using a time-calibrated phylogeny, we characterized hot and cold spots of lineage diversification across the angiosperm tree of life by modeling evolutionary diversification using stepwise AIC (MEDUSA). We also tested the whole-genome duplication (WGD) radiation lag-time model, which postulates that increases in diversification tend to lag behind established WGD events. Diversification rates have been incredibly heterogeneous throughout the evolutionary history of angiosperms and reveal a pattern of 'nested radiations' - increases in net diversification nested within other radiations. This pattern in turn generates a negative relationship between clade age and diversity across both families and orders. We suggest that stochastically changing diversification rates across the phylogeny explain these patterns. Finally, we demonstrate significant statistical support for the WGD radiation lag-time model. Across angiosperms, nested shifts in diversification led to an overall increasing rate of net diversification and declining relative extinction rates through time. These diversification shifts are only rarely perfectly associated with WGD events, but commonly follow them after a lag period. SN - 1469-8137 UR - https://www.unboundmedicine.com/medline/citation/26053261/Nested_radiations_and_the_pulse_of_angiosperm_diversification:_increased_diversification_rates_often_follow_whole_genome_duplications_ L2 - https://doi.org/10.1111/nph.13491 DB - PRIME DP - Unbound Medicine ER -