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

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

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Cambridge Prisms Extinction, Journal Year: 2024, Volume and Issue: 2

Published: Jan. 1, 2024

Abstract 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

13
Impact of the Jenkyns Event (early Toarcian) on dinosaurs: Comparison with the Triassic/Jurassic transition DOI Creative Commons
Matías Reolid, Wolfgang Ruebsam, Michael J. Benton

et al.

Earth-Science Reviews, Journal Year: 2022, Volume and Issue: 234, P. 104196 - 104196

Published: Sept. 28, 2022

The Early Jurassic Jenkyns Event (∼183 Ma) was characterized in terrestrial environments by global warming, perturbation of the carbon cycle, enhanced weathering and wildfires. Heating acid rain on land caused a loss forests affected diversity composition plant assemblages rest trophic web. We suggest that Event, triggered activity Karoo-Ferrar Large Igneous Province, pivotal remodelling ecosystems, including plants dinosaurs. Macroplant palynological data show reductions richness conifers, cycadophytes, ginkgophytes, bennetitaleans, ferns, continuation seasonally dry warm conditions. Major changes occurred to sauropodomorph dinosaurs, with extinction diverse basal families formerly called ‘prosauropods’ as well some sauropods, diversification derived Eusauropoda Toarcian South America, Africa, Asia, wider new families, Mamenchisauridae, Cetiosauridae Neosauropoda (Dicraeosauridae Macronaria) Middle Jurassic, showing massive increase size feeding modes. Ornithischian dinosaurs patchy records; heterodontosaurids scelidosaurids disappeared, major clades (Stegosauridae, Ankylosauridae, Nodosauridae) emerged soon after Bajocian Bathonian worldwide. Among theropod Coelophysidae Dilophosauridae died out during theropods (Megalosauroidea, Allosauroidea, Tyrannosauroidea) this event substantial increases size. then crisis marked especially floral origins clades, increasing body Comparison end Triassic Mass Extinction helps understand incidence climatic driven large igneous provinces ecosystems their great impacts early dinosaur evolution.

Language: Английский

Citations

21
Climatic controls on the ecological ascendancy of dinosaurs DOI Creative Commons
Emma M. Dunne,

Alexander Farnsworth,

Roger Benson

et al.

Current Biology, Journal Year: 2022, Volume and Issue: 33(1), P. 206 - 214.e4

Published: Dec. 16, 2022

The ascendancy of dinosaurs to become dominant components terrestrial ecosystems was a pivotal event in the history life, yet drivers their early evolution and biodiversity are poorly understood.1Brusatte S.L. Benton M.J. Ruta M. Lloyd G.T. first 50 Myr dinosaur evolution: macroevolutionary pattern morphological disparity.Biol. Lett. 2008; 4: 733-736https://doi.org/10.1098/rsbl.2008.0441Crossref PubMed Scopus (105) Google Scholar,2Irmis R.B. Evaluating hypotheses for diversification dinosaurs.Earth Environ. Sci. Trans. R. Soc. Edinb. 2010; 101: 397-426https://doi.org/10.1017/S1755691011020068Crossref (94) Scholar,3Benton Forth J. Langer M.C. Models rise dinosaurs.Curr. Biol. 2014; 24: R87-R95https://doi.org/10.1016/j.cub.2013.11.063Abstract Full Text PDF (93) Scholar During Late Triassic, were initially rare geographically restricted, only attaining wider distributions greater abundance following end-Triassic mass extinction event.4Brusatte Superiority, competition, opportunism evolutionary radiation dinosaurs.Science. 321: 1485-1488https://doi.org/10.1126/science.1161833Crossref (334) Scholar,5Langer Ezcurra M.D. Bittencourt J.S. Novas F.E. origin dinosaurs.Biol. Rev. Camb. Philos. 85: 55-110https://doi.org/10.1111/j.1469-185X.2009.00094.xCrossref (212) Scholar,6Langer Godoy P.L. So volcanoes created dinosaurs? quantitative characterization pan-aves.Front. Earth 2022; 10https://doi.org/10.3389/feart.2022.899562Crossref (3) This is consistent with an opportunistic expansion model, initiated by co-occurring groups such as aetosaurs, rauisuchians, therapsids.4Brusatte Scholar,7Tucker M.E. Triassic environments, climates reptile evolution.Palaeogeogr. Palaeoclimatol. Palaeoecol. 1982; 40: 361-379https://doi.org/10.1016/0031-0182(82)90034-7Crossref (89) Scholar,8Benton Dinosaur success triassic: noncompetitive ecological model.Q. 1983; 58: 29-55Crossref (170) However, this could instead be response changes global climatic through Jurassic transition, especially given increasing evidence that climate played key role constraining distributions.7Tucker Scholar,9Whiteside J.H. Lindström S. Irmis Glasspool I.J. Schaller M.F. Dunlavey Nesbitt S.J. Smith N.D. Turner A.H. Extreme ecosystem instability suppressed tropical dominance 30 million years.Proc. Natl. Acad. USA. 2015; 112: 7909-7913https://doi.org/10.1073/pnas.1505252112Crossref (61) Scholar,10Bernardi Gianolla P. Petti F.M. Mietto linked Carnian pluvial episode.Nat. Commun. 2018; 9: 1499https://doi.org/10.1038/s41467-018-03996-1Crossref (87) Scholar,11Lovelace D.M. Hartman S.A. Mathewson P.D. Linzmeier B.J. Porter W.P. Modeling Dragons: using mechanistic physiological microclimate models explore environmental, physiological, constraints on dinosaurs.PLoS One. 2020; 15e0223872https://doi.org/10.1371/journal.pone.0223872Crossref (8) Scholar,12Mancuso A.C. Benavente C.A. Mundil Evidence episode Gondwana: new multiproxy records bearing diversification.Gondwana Res. 86: 104-125https://doi.org/10.1016/j.gr.2020.05.009Crossref (35) Scholar,13Mancuso Pedernera T.E. Gaetano L.C. Breeden III B.T. Paleoenvironmental biotic late triassic Argentina: testing abiotic forcing at basin scale.Front. 10https://doi.org/10.3389/feart.2022.883788Crossref (4) Scholar,14Kent D.V. Clemmensen L.B. Northward dispersal from Gondwana Greenland mid-Norian (215–212 Ma, Triassic) dip atmospheric pCO2.Proc. 2021; 118e2020778118https://doi.org/10.1073/pnas.2020778118Crossref (16) Scholar,15Griffin C.T. Wynd B.M. Munyikwa D. Broderick T.J. Zondo Tolan Taruvinga H.R. Africa's oldest reveal suppression distribution.Nature. 609: 313-319https://doi.org/10.1038/s41586-022-05133-xCrossref Scholar,16Olsen Sha Fang Y. Chang C. Whiteside Kinney Sues H.-D. Kent Vajda V. Arctic ice dinosaurs.Sci. Adv. 8eabo6342https://doi.org/10.1126/sciadv.abo6342Crossref (5) Here, we test hypothesis elucidate how influenced distribution quantitatively examining tetrapod "climatic niche space" across Triassic-Jurassic boundary. Statistical analyses show sauropodomorph occupied more restricted space than other tetrapods dinosaurs, being excluded hottest, low-latitude zones. A subsequent, earliest geographic preferred conditions. Evolutionary model-fitting provide important shift cooler warmer niches during Sauropoda. These results facilitated change support dinosaurs.

Language: Английский

Citations

21
Digestive contents and food webs record the advent of dinosaur supremacy DOI Creative Commons
Martin Qvarnström, Joel Vikberg Wernström, Zuzanna Wawrzyniak

et al.

Nature, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract The early radiation of dinosaurs remains a complex and poorly understood evolutionary event 1–4 . Here we use hundreds fossils with direct evidence feeding to compare trophic dynamics across five vertebrate assemblages that record this in the Triassic–Jurassic succession Polish Basin (central Europe). Bromalites, fossil digestive products, increase size diversity interval, indicating emergence larger dinosaur faunas new patterns. Well-preserved food residues bromalite-taxon associations enable broad inferences interactions. Our results, integrated climate plant data, indicate stepwise ecospace occupancy area. This involved (1) replacement non-dinosaur guild members by opportunistic omnivorous precursors, followed (2) insect fish-eating theropods small dinosaurs. Climate change latest Triassic 5–7 resulted substantial vegetation changes paved way for ((3) (4)) an expansion herbivore pseudosuchian therapsid herbivores large sauropodomorphs ornithischians ingested broader range, even including burnt plants. Finally, (5) rapidly evolved developed enormous sizes response appearance guild. We suggest processes shown data may explain global patterns, shedding light on environmentally governed dominance gigantism endured until end-Cretaceous mass extinction.

Language: Английский

Citations

4
The spatiotemporal distribution of Mesozoic dinosaur diversity DOI Creative Commons
Philip D. Mannion

Biology Letters, Journal Year: 2024, Volume and Issue: 20(12)

Published: Dec. 1, 2024

Much of our view on Mesozoic dinosaur diversity is obscured by biases in the fossil record. In particular, spatiotemporal sampling heterogeneity affects identification timing and geographical location radiations, recognition latitudinal gradient, as well interpretation purported extinctions, faunal turnovers their drivers, including Early Jurassic Jenkyns Event across Jurassic/Cretaceous boundary. The current distribution means it impossible to robustly determine whether these 'events' were globally synchronous geologically instantaneous or spatiotemporally staggered. Accounting for also paramount reconciling notable differences results based sampling-standardized species richness versus reconstructions diversification rates, particularly with regards lead-up Cretaceous/Paleogene mass extinction. Incorporation a greater proportion stratigraphically well-resolved dinosaurs into analyses imperative must include substantial radiation birds. Given relative rarity temporally successive, well-sampled spatial windows, remains possible that rate showed little change after clade's initial until However, better understanding underlying sampling, combined holistic approach reconstructing diversification, an important step testing this hypothesis.

Language: Английский

Citations

2
Dinosaur Footprints Throughout Mesozoic Basins in Brazil DOI
Ismar de Souza Carvalho

Published: Jan. 1, 2024

Language: Английский

Citations

0
Decision: Mechanistic phylodynamic models do not provide conclusive evidence that non-avian dinosaurs were in decline before their final extinction — R2/PR9 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: March 5, 2024

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 — R2/PR7 DOI Creative Commons
Bethany J. Allen

Published: Feb. 19, 2024

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 — R2/PR8 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: Feb. 20, 2024

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 — R1/PR6 DOI Creative Commons
Bethany J. Allen,

Maria V. Volkova Oliveira,

Tanja Stadler

et al.

Published: Feb. 6, 2024

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