Séminaire : ADN environnemental & approches moléculaires innovantes

Orianne Tournayre, postdoctorante à l’ISEM (Montpellier) donnera un séminaire jeudi 13 novembre 2025, à 14 h, en salle -107M (laboratoire Chrono-environnement), qui sera également proposé en visioconférence (lien de connexion)

En analysant les traces d’ADN dans l’eau, l’air et le guano de chauve-souris, des approches moléculaires innovantes transforment la manière dont nous surveillons la biodiversité et comprenons l’impact des activités humaines sur les écosystèmes.

Résumé

Human activities have been reshaping biodiversity patterns on a global scale for decades. Yet, our ability to detect species and track their trends through time and space remains limited, an issue frequently underlined by major international initiatives. Current monitoring methods, while extremely valuable, often come with important limitations: they are usually taxon-specific, invasive, costly in terms of logistics and resources, and difficult to apply at large scales. In this seminar, I will share my work on developing integrative and non-invasive molecular approaches based on environmental DNA (eDNA) collected from different sources such as guano, water, and air. Through several examples, I will demonstrate how these methods can be used to assess the impact of human activities on biodiversity across scales and ecosystems. I will also highlight the very first national biodiversity survey based on airborne eDNA analysis, an innovative and highly standardized approach that opens new perspectives for large-scale monitoring.