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Göteborgs universitets publikationer

Fossil biogeography: a new model to infer dispersal, extinction and sampling from palaeontological data

Författare och institution:
Daniele Silvestro (Institutionen för biologi och miljövetenskap); Alexander Zizka (Institutionen för biologi och miljövetenskap); Christine D. Bacon (Institutionen för biologi och miljövetenskap); B. Cascales-Minana (-); N. Salamin (-); Alexandre Antonelli (Institutionen för biologi och miljövetenskap)
Publicerad i:
Philosophical Transactions of the Royal Society B-Biological Sciences, 371 ( 1691 )
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Methods in historical biogeography have revolutionized our ability to infer the evolution of ancestral geographical ranges from phylogenies of extant taxa, the rates of dispersals, and biotic connectivity among areas. However, extant taxa are likely to provide limited and potentially biased information about past biogeographic processes, due to extinction, asymmetrical dispersals and variable connectivity among areas. Fossil data hold considerable information about past distribution of lineages, but suffer from largely incomplete sampling. Here we present a new dispersal extinction sampling (DES) model, which estimates biogeographic parameters using fossil occurrences instead of phylogenetic trees. The model estimates dispersal and extinction rates while explicitly accounting for the incompleteness of the fossil record. Rates can vary between areas and through time, thus providing the opportunity to assess complex scenarios of biogeographic evolution. We implement the DES model in a Bayesian framework and demonstrate through simulations that it can accurately infer all the relevant parameters. We demonstrate the use of our model by analysing the Cenozoic fossil record of land plants and inferring dispersal and extinction rates across Eurasia and North America. Our results show that biogeographic range evolution is not a time-homogeneous process, as assumed in most phylogenetic analyses, but varies through time and between areas. In our empitical assessment, this is shown by the striking predominance of plant dispersals from Eurasia into North America during the Eocene climatic cooling, followed by a shift in the opposite direction, and finally, a balance in biotic interchange since the middle Miocene. We condude by discussing the potential of fossil-based analyses to test biogeographic hypotheses and improve phylogenetic methods in historical biogeography.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper
dispersal, extinction, incomplete fossil sampling, biogeographic trends, macroevolution, geographic range evolution, historical biogeography, paleocene/eocene, boundary, phylogenetic uncertainty, vicariance analysis, ancient, vicariance, bayesian-analysis, diversification, patterns, speciation, Life Sciences & Biomedicine - Other Topics, ates of america, v112, p6110, ates of america, v112, p8684, IENCESDiscussion Meeting on Plant Phylogeny and the Origin of Major Biomes, MAR 15-16, 2004
Postens nummer:
Posten skapad:
2016-06-08 14:13

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