The Cabrières Biota (France) provides insights into Ordovician polar ecosystems - Archive ouverte HAL
Article Dans Une Revue Nature Ecology & Evolution Année : 2024

The Cabrières Biota (France) provides insights into Ordovician polar ecosystems

Farid Saleh
Valentin Jamart
Sinéad Lynch
Harriet B. Drage
Eric Monceret
  • Fonction : Auteur
Sylvie Monceret
  • Fonction : Auteur

Résumé

Early Palaeozoic sites with soft-tissue preservation are predominantly found in Cambrian rocks and tend to capture past tropical and temperate ecosystems. In this study, we describe the diversity and preservation of the Cabrières Biota, a newly discovered Early Ordovician Lagerstätte from Montagne Noire, southern France. The Cabrières Biota showcases a diverse polar assemblage of both biomineralized and soft-bodied organisms predominantly preserved in iron oxides. Echinoderms are extremely scarce, while sponges and algae are abundantly represented. Non-biomineralized arthropod fragments are also preserved, along with faunal elements reminiscent of Cambrian Burgess Shale-type ecosystems, such as armoured lobopodians. The taxonomic diversity observed in the Cabrières Biota mixes Early Ordovician Lagerstätten taxa with Cambrian forms. By potentially being the closest Lagerstätte to the South Pole, the Cabrières Biota probably served as a biotic refuge amid the high-water temperatures of the Early Ordovician, and shows comparable ecological structuring to modern polar communities.
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hal-04724698 , version 1 (15-10-2024)

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Farid Saleh, Lorenzo Lustri, Pierre Gueriau, Gaëtan J.M. Potin, Francesc Pérez-Peris, et al.. The Cabrières Biota (France) provides insights into Ordovician polar ecosystems. Nature Ecology & Evolution, 2024, 8 (4), pp.651-662. ⟨10.1038/s41559-024-02331-w⟩. ⟨hal-04724698⟩
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