Séminaire IGE

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Nitrogen cycling in alpine ecosystems

vendredi 2 juin 2023 - 13h30

Ilann Bourgeois - Université Savoie Mont Blanc
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Nitrogen (N) is an essential nutrient for life on Earth. Yet, when in excess, it can have deleterious effects on the environment (e.g., soil and water acidification, loss of biodiversity, eutrophication). In remote ecosystems, sources of N can be either anthropogenic (e.g., atmospheric N deposition, pastoralism, tourism) or environmental (e.g., in situ production, snowmelt, glacier melt). But which ones are responsible for the observed eutrophication of alpine ecosystems? And what become of the excess N? In this seminar, I will present how the isotopic composition (D17O, d18O, d15N) of nitrate (NO3-) improves our understanding of N cycling, with specific focus on alpine ecosystems.

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Equipe organisatrice : Organisation labo

Salle de conférence MCP, IGE MCP, 38400 Saint Martin d'Hères

Informations de visio :

Register here : https://univ-grenoble-alpes-fr.zoom.us/meeting/register/tJEsceqhrD0rE9LnRevAzccRAYASR23LjNFt