Author comment: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R0/PR1 DOI Creative Commons
Bethany J. Allen

Published: Sept. 3, 2022

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Dinosaur extinctions related to the Jenkyns Event (early Toarcian, Jurassic) DOI Creative Commons
Matías Reolid, Wolfgang Ruebsam, Michael J. Benton

et al.

Spanish Journal of Palaeontology, Journal Year: 2022, Volume and Issue: 37(2), P. 123 - 140

Published: Dec. 22, 2022

The early Toarcian Jenkyns Event (~183 Ma) was characterized by a perturbation of the global carbon cycle, warming, which at continental areas led to intensified chemical weathering, enhanced soils erosion, and wildfires. Warming acid rain affected diversity composition land plant assemblages, caused loss forests thereby impacted on trophic webs. Event, triggered volcanic activity Karoo-Ferrar Large Igneous Province, changed terrestrial ecosystems, also dinosaurs. Fossil macroplant assemblages palynological data reveal reductions in richness communities. A substantial biomass shift dominated Cheiropelidiaceae conifers occurred as consequence seasonally dry warm conditions. Major changes hervivore dinosaurs, with extinction diverse basal families Sauropodomorpha (‘prosauropods’) well some sauropods. Ornithischian dinosaurs show patchy records; heterodontosaurids disappeared scelidosaurids (Thyreophora) went extinct during Event. dominant carnivorous Coelophysoidea (Theropoda), died out We interpret crisis for marked especially floral dinosaur clades, both hervivores carnivores.

Language: Английский

Citations

2
Recommendation: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R1/PR5 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: Nov. 28, 2023

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Citations

0
Author comment: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R1/PR4 DOI Creative Commons
Bethany J. Allen

Published: Nov. 2, 2023

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Citations

0
Decision: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R0/PR3 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: Oct. 17, 2023

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Citations

0
Recommendation: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R0/PR2 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: Oct. 17, 2022

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Citations

0
Author comment: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R0/PR1 DOI Creative Commons
Bethany J. Allen

Published: Sept. 3, 2022

Phylodynamic models can be used to estimate diversification trajectories from time-calibrated phylogenies. Here we apply two such phylogenies of non-avian dinosaurs, a clade whose evolutionary history has been widely debated. Although some authors have suggested that the experienced decline in diversity, potentially starting millions years before end-Cretaceous mass extinction, others group remained highly diverse right up until Cretaceous-Paleogene (K-Pg) boundary. Our results show model assumptions, likely with respect incomplete sampling, large impact on whether dinosaurs appear long-term or not. The are also sensitive topology and branch lengths phylogeny used. Developing comprehensive sampling bias, building larger more accurate phylogenies, necessary steps for us determine dinosaur diversity was not extinction.

Language: Английский

Citations

0