Sea level controls on Ediacaran-Cambrian animal radiations

Science Advances, Journal Year: 2024, Volume and Issue: 10(31)

Published: July 31, 2024

The drivers of Ediacaran-Cambrian metazoan radiations remain unclear, as does the fidelity record. We use a global age framework [580-510 million years (Ma) ago] to estimate changes in marine sedimentary rock volume and area, reconstructed biodiversity (mean genus richness), sampling intensity, integrated with carbonate carbon isotopes (δ

Language: Английский

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Global diversity dynamics in the fossil record are regionally heterogeneous

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: May 18, 2022

Global diversity patterns in the fossil record comprise a mosaic of regional trends, underpinned by spatially non-random drivers and distorted variation sampling intensity through time across space. Sampling-corrected estimates from spatially-standardised datasets retain their biogeographic nuances avoid these biases, yet diversity-through-time arises interplay origination extinction, processes that shape macroevolutionary history. Here we present subsampling algorithm to eliminate spatial bias, coupled with advanced probabilistic methods for estimating extinction rates Bayesian method sampling-corrected diversity. We then re-examine Late Permian Early Jurassic marine record, an interval spanning several global biotic upheavals shaped origins modern biosphere. find are regionally heterogenous even during events manifested globally, highlighting need explicit views geological time.

Language: Английский

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Imbalanced speciation pulses sustain the radiation of mammals

Science, Journal Year: 2024, Volume and Issue: 384(6699), P. 1007 - 1012

Published: May 30, 2024

The evolutionary histories of major clades, including mammals, often comprise changes in their diversification dynamics, but how these occur remains debated. We combined comprehensive phylogenetic and fossil information a new "birth-death diffusion" model that provides detailed characterization variation rates mammals. found an early rising sustained scenario, wherein speciation increased before during the Cretaceous-Paleogene (K-Pg) boundary. K-Pg mass extinction event filtered out more slowly speciating lineages was followed by subsequent slowing rather than rebounds. These dynamics arose from imbalanced process, with separate giving rise to many, less speciation-prone descendants. Diversity seems have been brought about isolated, fast-speciating lineages, few punctuated innovations.

Language: Английский

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Spatiotemporal variability in the South American mammalian fossil record and its impact on macroevolutionary inference

Frontiers in Mammal Science, Journal Year: 2025, Volume and Issue: 3

Published: Jan. 7, 2025

Macroevolutionary studies using the fossil record have provided valuable information about evolutionary history of mammals, helping us to understand some processes underlying shifts in diversification dynamics. Yet, most on mammal focused Northern Hemisphere. The general view that quality South American clades is too limited has precluded continental-level macroevolutionary continent. However, adequately evaluate how much we can learn from record, need limitations affect uncertainty estimates. Here, investigated spatiotemporal distribution occurrences eleven mammalian and used a Bayesian approach accounts for incompleteness analyze estimates times origination extinction, extinction rates are affected by record. We show main shortcoming not its overall but unevenness. Most early immigrant lower preservation than late clades. Accordingly, root age larger earlier Despite were still able identify significant rate throughout may be explained environmental changes. also find discrepancies with patterns inferred phylogenies, which suggest detect fossils might reflect regional trends or driven lineages higher preservation. Contrasting results obtained different approaches, such as molecular data, where they converge diverge, help delineate spatial scale phylogenetic scope observed patterns. Our work contributes better understanding opportunities research evolution mammals

Language: Английский

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Exploring the diversity and disparity of rhabdodontomorph ornithopods from the Late Cretaceous European archipelago

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 30, 2025

The origin and early diversification of ornithopods, a major clade ornithischian dinosaurs, remain poorly understood, with conflicting phylogenetic hypotheses regarding rootward neornithischian relationships. Some topological stability is inferred near the basal divergence Iguanodontia, though ingroup relationships unclear. For instance, Rhabdodontidae, Late Cretaceous European ornithopods 'traditionally' considered to include eight nine species, presents significant taxonomic challenges. We explore diversity disparity Rhabdodon-lineage iguanodontians. assembled novel dataset comprising morphological morphometric data obtained from rhabdodontomorph dentaries, which are abundant, well-preserved in majority taxa, distinctive. Special attention given Rhabdodon septimanicus, known taxon upper Campanian lower Maastrichtian southern France, established based on particularly robust dentary bone that has been subjected interpretations. Our restudy specimen, combined multivariate assessment, shows this clear outlier among rhabdodontomorphs, providing basis for its assignment new genus, Obelignathus. Although further large-scale studies, especially detailed osteological descriptions, needed clarify significance certain our results indicate group exhibits greater than currently recognized, several sympatric taxa co-occurring, at least France possibly also Romania.

Language: Английский

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So Volcanoes Created the Dinosaurs? A Quantitative Characterization of the Early Evolution of Terrestrial Pan-Aves

Frontiers in Earth Science, Journal Year: 2022, Volume and Issue: 10

Published: June 2, 2022

The early Mesozoic is marked by several global-scale environmental events, including the emplacement of large igneous provinces, such as Siberian Traps, Wrangellia, and Central Atlantic Magmatic Province (CAMP). These have been hypothesised drivers successful diversification Pan-Aves, lineage archosaurs closer to birds than crocodiles. We characterize here body size evolution terrestrial pan-avians (excluding pterosaurs) along Triassic Early Jurassic, using phylogenetic- occurrence-based approaches, in an attempt test influence drivers. As diversity metrics, we quantified raw species richness phylogenetic (using time-calibrated trees), net rates were estimated with PyRate episodic fossilized-birth-death model. also characterised through-time patterns (femoral length) evolutionary rates. Our results indicate that macroevolutionary shifts from occurrence data are placed more recently time those phylogenetic-based shown higher increase, rates, disparity Pan-Aves Carnian. This consistent hypotheses suggesting Carnian Pluvial Episode (CPE) was crucial for radiation group. Yet, phylogeny-based show diversity/diversification Ladinian Norian, a minor effect (CPE). found no meaningful diversity, diversification, or size-related metrics across Triassic-Jurassic boundary. Even if end-Triassic mass extinction possibly emptied ecospace, allowing dinosaur increase during our suggest this expansion did not occur fast homogeneously entire In fact, sustained reduction sub-zero seen after extinction, but should be interpreted care towards end they may biased “edge effect.” Overall, few consistently identified all results, nuanced complex anticipated.

Language: Английский

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Diversity-Dependent Diversification in the History of Marine Animals

The American Naturalist, Journal Year: 2022, Volume and Issue: 201(5), P. 680 - 693

Published: Nov. 30, 2022

By comparing detrended estimates of diversity (taxonomic richness) and rates origination, extinction, net diversification, I show that at the global scale over course Phanerozoic eon, diversification origination are negatively correlated with diversity. contrast, extinction only weakly for most part. These results hold both genus- species-level data many alternative analytical protocols. The asymmetry between on one hand other supports a model whereby is largely driven by abiotic perturbations, subsequent filling void left depleted Diversity dependence somewhat weaker, but still evident, if initial Ordovician radiation or rebounds from major mass extinctions omitted analysis; thus, influenced, not dominated, these special intervals Earth history. In transition Paleozoic to post-Paleozoic time, weakens while strengthens; however, barely changes in strength. Despite nuances, individual clades yield consistent those aggregate all animals. On whole, diversity-dependent appears be pervasive factor macroevolution marine animal life.

Language: Английский

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Macroevolutionary perspectives on Anthropocene extinction

Biological Conservation, Journal Year: 2022, Volume and Issue: 274, P. 109733 - 109733

Published: Sept. 14, 2022

Language: Английский

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Trait-mediated speciation and human-driven extinctions in proboscideans revealed by unsupervised Bayesian neural networks

Science Advances, Journal Year: 2024, Volume and Issue: 10(30)

Published: July 24, 2024

Species life-history traits, paleoenvironment, and biotic interactions likely influence speciation extinction rates, affecting species richness over time. Birth-death models inferring the impact of these factors typically assume monotonic relationships between single predictors limiting our ability to assess more complex effects their relative importance interaction. We introduce a Bayesian birth-death model using unsupervised neural networks explore multifactorial nonlinear on rates fossil data. It infers lineage- time-specific disentangles predictor through explainable artificial intelligence techniques. Analysis proboscidean record revealed shaped by dietary flexibility biogeographic events. The emergence modern humans escalated causing recent diversity decline, while regional climate had lesser impact. Our paves way for an improved understanding intricate dynamics shaping clade diversification.

Language: Английский

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A macroevolutionary analysis of European Late Upper Palaeolithic stone tool shape using a Bayesian phylodynamic framework

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(8)

Published: Aug. 1, 2024

Phylogenetic models are commonly used in palaeobiology to study the patterns and processes of organismal evolution. In human sciences, phylogenetic methods have been deployed for reconstructing ancestor-descendant relationships using linguistic material culture data. Within evolutionary archaeology specifically, analyses based on maximum parsimony discrete traits dominate, which sets limitations downstream role cultural phylogenies, once derived, can play more elaborate analytical pipelines. Recent methodological advances Bayesian phylogenetics, however, now allow us infer dynamics continuous characters. Capitalizing these developments, we here present an exploratory analysis macroevolution projectile point shape evolution European Final Palaeolithic earliest Mesolithic (approx. 15 000-11 000 BP) a phylodynamic approach fossilized birth-death process model. This model-based leaps far beyond application parsimony, that it not only produces tree, but also divergence times, diversification rates while incorporating uncertainties. allows compare pronounced climatic changes occurred during our time frame. While common language, extension arguably represents major breakthrough.

Language: Английский

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