Reconstructing deep-time paleoclimate legacies unveil the demise and turnover of the ancient (boreo)tropical flora
Meseguer Andrea S. 1Lobo Jorge M. 2Cornuault Josselin 3Beerling David 4Jousselin Emmanuelle 5Davis Charles C. 6Sanmart¨an Isabel 3Ruhfel Brad R.7
作者信息
- 1. Department of Biodiversity and Conservation, Real Jard¨an Bot¨￠nico||INRA, UMR 1062 CBGP (INRA, IRD, CIRAD, Montpellier SupAgro), The Center for Biology and Management of Populations (CBGP), Avenue du Campus Agropolis||CNRS, UMR 5554 Institut des Sciences de l'Evolution (Universit¨| de Montpellier)
- 2. Department of Biogeography and Global Change, Museo Nacional Ciencias Naturales
- 3. Department of Biodiversity and Conservation, Real Jard¨an Bot¨￠nico
- 4. Department of Animal and Plant Sciences, University of Sheffield
- 5. INRA, UMR 1062 CBGP (INRA, IRD, CIRAD, Montpellier SupAgro), The Center for Biology and Management of Populations (CBGP), Avenue du Campus Agropolis
- 6. Department of Organismic and Evolutionary Biology, Harvard University Herbaria
- 7. Department of Biological Sciences, Eastern Kentucky University||Department of Organismic and Evolutionary Biology, Harvard University Herbaria
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Abstract
ABSTRACT
AimSince the Late Cretaceous, the Earth has gone through periods of climate change similar in scale and pace to the warming trend observed today in the Anthropocene. The impact of these ancient climatic events on the evolutionary trajectories of organisms provides clues on the organismal response to climate change, including extinction, migration or persistence. Here, we examine the evolutionary response to climate cooling/warming events of the clusioid families Calophyllaceae, Podostemaceae and Hypericaceae (CPH), and the genus Hypericum as test cases.
LocationHolarctic.
Time periodLate Cretaceous-Cenozoic
Major taxa studiedangiosperms
MethodsWe use paleoclimate simulations, species distribution models and phylogenetic comparative approaches calibrated with fossils.
ResultsAncestral CPH lineages could have been distributed in the Holarctic 100 Ma, occupying tropical subhumid assemblages, a finding supported by the fossil record. Expansion to closed-canopy tropical rain forests occurred after 60 Ma, in the Cenozoic, in agreement with earlier ideas of a post-Cretaceous origin of current tropical rain forest. Cooling during this period triggered diversification declines on CPH tropical lineages, and was associated with a climatic shift towards temperate affinities in Hypericum. Hypericum subsequently migrated to tropical mountains where it encountered different temperate conditions than in the Holarctic.
Main conclusionsWe hypothesize that most clusioid CPH lineages failed to adapt to temperate regimes during periods of Cenozoic climate change, and thus went extinct in the Holarctic. In contrast, boreotropical descendants including Hypericum that underwent niche evolution demonstrated selective advantages as climates became colder. Our results points toward macroevolutionary trajectories involving the altering fates of closely related clades that adapt to periods of global climate change versus those that do not. Moreover, they suggest the hypothesis that potentially many clades, particularly inhabitants of boreotropical floras, were likely extirpated from the Holarctic and persist today (if at all) in more southern tropical locations.Key words
boreotropical flora/climate cooling/diversification/fossils/niche evolution/Hypericum引用本文复制引用
Meseguer Andrea S.,Lobo Jorge M.,Cornuault Josselin,Beerling David,Jousselin Emmanuelle,Davis Charles C.,Sanmart¨an Isabel,Ruhfel Brad R..Reconstructing deep-time paleoclimate legacies unveil the demise and turnover of the ancient (boreo)tropical flora[EB/OL].(2025-03-28)[2026-05-24].https://www.biorxiv.org/content/10.1101/208454.学科分类
古生物学/环境科学理论/植物学
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