New developments in tracking archeological evidence from lake sediment core analysis: A case study of the Paleo-Inuit and Thule-Inuit on Somerset Island in Nunavut, Arctic Canada

Jules Blais, Professeur à l'université d'Ottawa

Séminaire de l’UMR METIS-IPSL.


Date de début 15/05/2024 13:00
Date de fin 15/05/2024
Lieu Laboratoire METIS, Salle Darcy, tour 46-56, 3e étage


Lake sediments are useful to track long-term environmental changes. Recent developments in analytical approaches allow us to ask new questions about recent climate change,  human perturbations, and even fluctuations in large-scale animal migrations based on lake sediment core analysis.

We are working to develop geochemical techniques (stable isotopes, sterols, stanols, eDNA) and working with colleagues who specialize in biological tracers (especially microfossil community assemblages of diatoms and chironomids) and paleoclimate indictors to help us track migratory seabird and Pacific salmon populations from sediment records. We are also finding evidence that large animal population migrations may have responded to climatic anomalies and other perturbations related to human activities.

This seminar will explore new developments in lake sediment archival analysis of cores adjacent to large seabird colonies and major Pacific salmon migration routes. I will introduce some of the methods we have used to track past seabird and Pacific salmon population dynamics from sediment records and show how climatic anomalies affected these signals.


Jules Blais est Professeur à l’université d’Ottawa.

Informations supplémentaires

Laboratoire METIS, Sorbonne Université, Campus Pierre et Marie Curie
4, place Jussieu 75005 Paris
Salle Darcy, tour 46-56, 3e étage.

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ID de réunion: 940 2671 0640
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