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Tectonic blocks and molecular clocks.

Kenneth De Baets1, Alexandre Antonelli2, Philip C J Donoghue3

  • 1School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK GeoZentrum Nordbayern, Fachgruppe PaläoUmwelt, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loewenichstr. 28, 91054 Erlangen, Germany kenneth.debaets@fau.de.

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|June 22, 2016
PubMed
Summary
This summary is machine-generated.

Phylogenetic trees can be dated using geological events, complementing fossil data. This approach refines evolutionary timescales and biodiversity studies by accommodating uncertainties in biogeographic calibrations.

Keywords:
biogeographycalibrationfossil recordmolecular clocktectonics

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Area of Science:

  • Evolutionary Biology
  • Geology
  • Paleontology

Background:

  • Molecular clock dating traditionally relies on fossil records, which provide minimum age constraints for clades.
  • Geological events offer an alternative calibration method for phylogenetic trees by dating biogeographic vicariance.
  • Tectonic events are complex and their impact on biogeography and clade evolution requires careful consideration of ecological factors.

Purpose of the Study:

  • To explore the utility of geological events for calibrating molecular clocks.
  • To demonstrate how biogeographic calibrations can be established using geological data.
  • To highlight the complementary nature of fossil and biogeographic calibrations for molecular clock analyses.

Main Methods:

  • Utilizing precisely dated geological events to calibrate phylogenetic trees.
  • Examining case studies of tectonic events, including the Isthmus of Panama uplift, New Zealand's separation from Gondwana, and the Atlantic Ocean opening.
  • Developing methods to accommodate uncertainties associated with biogeographic calibrations.

Main Results:

  • Biogeographic calibrations based on geological data provide valuable constraints for molecular clock analyses.
  • Examples demonstrate the application of geological data to date key biogeographic events.
  • The study illustrates how uncertainties in biogeographic calibrations can be managed.

Conclusions:

  • Biogeographic and fossil calibrations are complementary tools for dating species divergences.
  • Integrating geological data enhances the accuracy and reliability of molecular clock estimates.
  • This approach aids in robustly investigating the role of biogeographic mechanisms in shaping biodiversity.