No Furongian Biodiversity Gap: Evidence from South China

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2023, Volume and Issue: 618, P. 111492 - 111492

Published: March 8, 2023

Language: Английский

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Historical bias in palaeontological collections: Stylophora (Echinodermata) as a case study

Swiss Journal of Palaeontology, Journal Year: 2025, Volume and Issue: 144(1)

Published: Jan. 21, 2025

Abstract Scientific colonialism (sensu Galtung, 1967) has grown in interest for the last decades all scientific disciplines, including Palaeontology. In particular, Raja et al. (2022) showed that Paleobiology Database (PBDB) was mostly based on research investigations from and/or higher-income countries (i.e., Global North). This practice, better known as “parachute science”, often implies a transfer of material their country origin (in South) to another collection We show this global pattern can also be observed at lower taxonomic scale by focusing Stylophora, an extinct class echinoderms. Based database gathering 129 stylophoran holotypes information year description, origin, and author affiliation, we comparable results those (2022). Indeed, 85% species originated North. Transferred represents 17% none corresponding publications included local collaboration. detail most highlighting example parachute science, duo Morocco-France, understand consequences colonial history between these two practice French researchers Morocco, well solution brought Moroccan government. These results, while not surprising, mean is indeed only databases, but our daily work. Researchers North then act decolonize problematic rebalance knowledge producing build true Research Community.

Language: Английский

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Early colonization of the deep-sea bottom—The protracted build-up of an ecosystem

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(8)

Published: Feb. 10, 2025

Our understanding of the patterns and processes behind evolution deep-marine ecosystems is limited because body-fossil record deep sea poor. However, that gap in knowledge may be filled as deposits are host to diverse abundant trace fossils activities benthic organisms. Here, we built a global dataset trace-fossil occurrences from comprehensive survey 720 Ediacaran–Devonian units show establishment modern-style ecosystem was protracted coincident with cooling increase oxygenation during Ordovician. The formation open burrows have increased bioirrigation uppermost sediment zone, promoting ventilation generating an engineering feedback loop between bioturbation pore-water oxygenation. Sharp changes Devonian originated oxygen variations resulting climate-controlled oceanic circulation.

Language: Английский

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Evolutionary and ecologic controls on benthos distribution from an upper Cambrian incised estuarine valley: Implications for the early colonization of marginal-marine settings

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2023, Volume and Issue: 626, P. 111692 - 111692

Published: June 17, 2023

Language: Английский

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Analysis of the environmental impacts affecting Cambrian reef building and carbonate settings during the Miaolingian and Furongian epochs: A hypothesis for consideration

Evolving Earth, Journal Year: 2023, Volume and Issue: 1, P. 100002 - 100002

Published: June 8, 2023

The Miaolingian and Furongian epochs of the Cambrian period have been identified as a time limited metazoan reef development. aim this paper is to improve understanding biological geochemical conditions that affected reefs during interval, propose hypothesis for why development was inhibited. To address these issues, global dataset fossil occurrences (N = 25,307) spanning Stage 4 early Ordovician (Tremadocian) extracted from Paleobiology Database, Paleoreef review primary literature. Findings show proportion constructed by metazoans fell 40% in Wuliuan age 0% Drumian age, with being overwhelmingly dominated microbial ecosystems through remainder Cambrian. skeletal material carbonate 85% 63% across all occurrence data, before recovering. These findings suggest environmental may not favorable organisms, but does fully explain prolonged reduction within throughout interval. A proposed here abundances were low because two factors: (1) shallow water anoxia – other factors such elevated temperatures ocean acidification caused extinction builders late-early (2) deep marine regression, resulted loss habitat. inhibiting necessarily concurrent are inferred collectively suppressed growth until Early when more shelf space new occurred. This provides first step exploration middle late general.

Language: Английский

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Early Tremadocian cephalopods from Santa Rosita Formation in NW Argentina: the oldest record for South America

Acta Palaeontologica Polonica, Journal Year: 2023, Volume and Issue: 68

Published: Jan. 1, 2023

cephalopods from Santa Rosita Formation in NW Argentina:

Language: Английский

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Actualistic approach to the chemical preservation potential and its influence on the Caenogastropoda biodiversity

Historical Biology, Journal Year: 2023, Volume and Issue: unknown, P. 1 - 11

Published: July 6, 2023

The Cretaceous Period is characterised by a peak in ocean surface acidity, which may have altered the fossil representation of its marine biota. Thus, we propose to study dissolution Caenogastropoda shells and verify number occurrences respective families during Cretaceous, aiming produce insights on groups present higher chemical preservation potential low pH environments. An experimental taphonomy approach was used obtain mass loss rate 12 without taphonomic damage. Morphometric measurements were conducted, each shell subjected solution acetic acid diluted distilled water, remaining for 24 h. At interval four eight hours, samples dried, weighed, container checked. As result, it recognised that with lower rates, other words more resistant conditions simulated benthic taphonomically active zone, are those distribute over smaller area. This corroborates high occurrence their Cretaceous. show highest potential, therefore, lowest area ratio.

Language: Английский

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Animal abundance and redox conditions during the Furongian Cambrian SPICE event, western Utah

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2023, Volume and Issue: 630, P. 111794 - 111794

Published: Sept. 9, 2023

Language: Английский

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Editorial Preface to Special Issue: The radiations within the Great Ordovician Biodiversification Event

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2023, Volume and Issue: 632, P. 111838 - 111838

Published: Oct. 7, 2023

Language: Английский

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Cambrian explosion and Ordovician biodiversification or Cambrian biodiversification and Ordovician explosion?

Evolving Earth, Journal Year: 2023, Volume and Issue: 1, P. 100018 - 100018

Published: Nov. 10, 2023

In this study, we examine how metazoan biodiversity has accumulated from the late Precambrian until Silurian at various scales of taxonomic organization using compilations First Appearance Data (FAD) global marine Metazoa datasets available in Paleobiology Database (PBDB) and primary literature. The results indicate that all animal phyla appear during earlier parts Cambrian, which corresponds to usual concept Cambrian Explosion. However, lower ranks, a significant increase first appearances is observed Ordovician, corresponding an Ordovician Explosion orders, families genera. cumulative counts FADs these ranks reveal gradual long-term diversity, reflecting single large-scale radiation started lasted least Silurian. This scenario corroborates recent studies point towards early Palaeozoic, without clearly distinguishable diversity explosions discrete intervals.

Language: Английский

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