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NOTION: Nitrogen fixers structuring phytoplankton biodiversity in the ocean under climate change

15.04.2020 - 31.12.2025
Project coordinated by:
Mediterranean Institute of Oceanography (MIO)
Project manager (IOW):
Prof. Dr. Maren Voß
Fondation BNP Paribas

The goal of NOTION is to determine how climate change will affect the activity of diazotrophs, and how they will impact phytoplankton biodiversity and productivity in the future ocean. To that end, we will enhance global ocean ecological models with new datasets and parameterizations stemmed from dedicated experiments. NOTION will take the unprecedented challenge of integrating genetic data into biogeochemical models to cover an important current gap in our knowledge: bridging phylogenetic and functional diversity. This new insight will be highly useful for the scientific community, serving as a role model for future studies focusing on other planktonic groups.


  • Filella, A., J. Umbricht, A. Klett, A. Vogts, T. Vannier, O. Grosso, M. Voss, L. Riemann and M. Benavides (2024). Dissolved organic matter offsets the detrimental effects of climate change in the nitrogen-fixing cyanobacterium Crocosphaera. Limnol. Oceanogr. Lett. 9, 296-306, doi: 10.1002/lol2.10380