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Title: Turnover of southern cypresses in the post-Gondwanan world: extinction, transoceanic dispersal, adaptation and rediversification
Authors: Crisp, Michael D.
Cook, Lyn G.
Bowman, David M. J. S.
Cosgrove, Meredith
Isagi, Yuji  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9777-076X (unconfirmed)
Sakaguchi, Shota  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-6180-1747 (unconfirmed)
Author's alias: 井鷺, 裕司
阪口, 翔太
Keywords: biome shift
Callitris
conifers
extinction
fossils
long‐distance dispersal
serotiny
vicariance
Issue Date: Mar-2019
Publisher: Wiley
Journal title: The New phytologist
Volume: 221
Issue: 4
Start page: 2308
End page: 2319
Abstract: Cupressaceae subfamily Callitroideae has been an important exemplar for vicariance biogeography, but its history is more than just disjunctions resulting from continental drift. We combine fossil and molecular data to better assess its extinction and, sometimes, rediversification after past global change. Key fossils were reassessed and their phylogenetic placement for calibration was determined using trait mapping and Bayes Factors. Five vicariance hypotheses were tested by comparing molecular divergence times with the timing of tectonic rifting. The role of adaptation to fire (serotiny) in its spread across a drying Australia was tested for Callitris. Our findings suggest that three transoceanic disjunctions within the Callitroideae probably arose from long‐distance dispersal. A signature of extinction, centred on the end‐Eocene global climatic chilling and drying, is evident in lineages‐through‐time plots and in the fossil record. Callitris, the most diverse extant callitroid genus, suffered extinctions but surviving lineages adapted and re‐radiated into dry, fire‐prone biomes that expanded in the Neogene. Serotiny, a key adaptation to fire, likely evolved in Callitris coincident with the biome shift. Both extinction and adaptive shifts have probably played major roles in this chronicle of turnover and renewal, but better understanding of biogeographical history requires improved taxonomy of fossils.
Rights: © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/2433/244041
DOI(Published Version): 10.1111/nph.15561
PubMed ID: 30367483
Appears in Collections:Journal Articles

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