publication . Article . Other literature type . 2018

Dinosaurs reveal the geographical signature of an evolutionary radiation

Ciara O’Donovan; Andrew Meade; Chris Venditti;
Open Access English
  • Published: 05 Feb 2018
  • Publisher: Nature
  • Country: United Kingdom
Abstract
Dinosaurs dominated terrestrial ecosystems across the globe for over 100 million years and provide a classic example of an evolutionary radiation. However, little is known about how these animals radiated geographically to become globally distributed. Here, we use a biogeographical model to reconstruct the dinosaurs’ ancestral locations, revealing the spatial mechanisms that underpinned this 170-million-year-long radiation. We find that dinosaurs spread rapidly initially, followed by a significant continuous and gradual reduction in their speed of movement towards the Cretaceous/Tertiary boundary (66 million years ago). This suggests that the predominant mode of...
Subjects
free text keywords: Evolutionary radiation, Ecology, Geography, Biological evolution, Genetic Speciation, Terrestrial ecosystem, Speciation, media_common.quotation_subject, media_common, Cretaceous, Sympatric speciation
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