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Revisiting the origin and diversification of vascular plants through a comprehensive Bayesian analysis of the fossil record

Artikel i vetenskaplig tidskrift
Författare Daniele Silvestro
B. Cascales-Minana
Christine D. Bacon
Alexandre Antonelli
Publicerad i New Phytologist
Volym 207
Nummer/häfte 2
Sidor 425-436
ISSN 0028-646X
Publiceringsår 2015
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 425-436
Språk en
Länkar dx.doi.org/10.1111/nph.13247
Ämnesord biodiversity changes, diversification, floristic turnover, mass extinction, plant fossils, PyRate, PHANEROZOIC TAXONOMIC DIVERSITY, CRETACEOUS-PALEOGENE BOUNDARY, PERMIAN, MASS EXTINCTION, VARISCAN EURAMERICA, DIVERGENCE TIMES, KINETIC-MODEL, LAND PLANTS, SEED FERNS, ANGIOSPERMS, EVOLUTION, Plant Sciences, ATES OF AMERICA, V109, P21396, ATES OF AMERICA, V108, P15253, ATES OF AMERICA, V107, P5897
Ämneskategorier Botanik

Sammanfattning

Plants have a long evolutionary history, during which mass extinction events dramatically affected Earth's ecosystems and its biodiversity. The fossil record can shed light on the diversification dynamics of plant life and reveal how changes in the origination-extinction balance have contributed to shaping the current flora. We use a novel Bayesian approach to estimate origination and extinction rates in plants throughout their history. We focus on the effect of the Big Five' mass extinctions and on estimating the timing of origin of vascular plants, seed plants and angiosperms. Our analyses show that plant diversification is characterized by several shifts in origination and extinction rates, often matching the most important geological boundaries. The estimated origin of major plant clades predates the oldest macrofossils when considering the uncertainties associated with the fossil record and the preservation process. Our findings show that the commonly recognized mass extinctions have affected each plant group differently and that phases of high extinction often coincided with major floral turnovers. For instance, after the Cretaceous-Paleogene boundary we infer negligible shifts in diversification of nonflowering seed plants, but find significantly decreased extinction in spore-bearing plants and increased origination rates in angiosperms, contributing to their current ecological and evolutionary dominance.

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