UMR CNRS 5805 EPOC
Environnements et Paléoenvironnements
Océaniques et Continentaux

        

Consignes de Sécurité et Numéros d'Urgence
(à l'usage des personnels du laboratoire)

May 25, 2023  11 am

Lieu Salle Univers, Bâtiment B18N, OASU, Université de Bordeaux Intervenant(s) Linda Armbrecht, Institute for Marine and Antarctic Studies (IMAS), Université de Tasmanie, Australie

sedaDNA research has become increasingly applied to reconstruct paleo-ecosystems worldwide, with sampling and laboratory as well as bioinformatic techniques to analyse the complex genetic data rapidly advancing. These optimisations in thesedaDNA workflow mean that we can now extract and analyse sedaDNA from less than a gram of seafloor sediments, and by applying a metagenomics approach combined with hybridisation capture, we also can now isolate and investigate ancient DNA from keystone organisms. These technologies and advances further allow us to acquire sufficient genetic material for robust statistical analyses and authentication by means of DNA damage analyses. However, many questions remain open such as 'how far back in time can we go?', 'where do we find the best preserved ancient DNA?', and 'can we study organisms across the food web from bacteria to plankton to fish?'. This presentation will address these questions, and showcase the latest, deep-time sedaDNA data generated using metagenomics from seafloor samples collected off West Antarctica (Iceberg Alley/IODP Exp. 382).