retour en haut de la page
Project finished in 2019


Global Evaluation of the Impacts of Storms on freshwater Habitat and structure of phytoplankton Assemblages 


Phytoplankton abundance and composition are sensitive to water column conditions which are strongly influenced by weather (e.g., wind and rain) and climate change.


GEISHA was framed in support to the GLEON Stormblitz project to gather and analyse time-series through collaborative efforts to assess the impacts of storms on phytoplankton. The project includes more than 80 researchers from governmental institutes and universities. 


GEISHA’s goals were to:

  • gather and standardize existing long-term datasets,
  • assess the impact of storms on nutrients, light, water column stability and subsequent impacts on the structure of phytoplankton communities,
  • perform meta-analyses to evaluate the sensitivity of aquatic ecosystems to extreme weather events, and
  • provide new frameworks to explore theoretical questions related to phytoplankton diversity, succession and ecosystem resilience to extreme weather events.



CESAB Geisha

© CESAB Geisha 2019


More information about GEISHA: https://www.geisha-stormblitz.fr


GEISHA received funding from the USGS John Wesley Powell Center for Synthesis and Analysis, the University of Savoie Mont-Blanc (France), Fulbright, and the French embassy in Canada (grant Mourou/Strickland).

More information

GEISHA brings together specialists in limnology, plankton ecology and taxonomy, global change, statistics and data analysis.  



Orlane ANNEVILLE – INRAE (France); Jason STOCKWELL – University of Vermont (USA); Vijay PATIL – US Geological Survey, Alaska (USA)



Jonathan DOUBEK – University of Vermont (USA)



Rita ADRIAN – IGB Berlin (Germany); Laurence CARVALHO – Centre of Environment and Hydrology (UK); Chun Wei CHANG – National Taiwan University (Taiwan); Gaël DUR – Shizuoka University (Japon); Chih-hao HSIEH – National Taiwan University (Taiwan); Marc LAJEUNESSE – University of South Florida (USA); Aleksandra LEWANDOWSKA – University of Oldenburg (Germany); James RUSAK – Dorset Environmental Science Centre (Canada); Nico SALMASO – IASMA Research and Innovation Centre (Italy); François SCHMITT – CNRS, LOG (France); Sami SOUISSI – University Lille 1 (France); Dietmar STRAILE – University of Konstanz (Germany); Christian Torsten SELTMANN – Leibniz Institute of Freshwater Ecology and Inland Fisheries (Germany); Stephen THACKERAY – Centre of Environment and Hydrology (UK); Pablo URRUTIA CORDERO – Uppsala University (Sweden); Patrick VENAIL – University of Geneva (Switzerland); Iestyn WOOLWAY – Dundalk Institute of Technology (UK).


[04] Chang CW, Ye H, Miki T, Deyle ER, Souissi S, Anneville O, Adrian R, Chiang Y-R, Ichise S, Kumagai M, Matsuzaki SS, Shiah F-K, Wu J-T, hao Hsieh C & Sugihara G (2020) Long-term warming destabilizes aquatic ecosystems through weakening biodiversity-mediated causal networks. Global Change Biology, 26, 6413–6423. doi: 10.1111/gcb.15323.


[03] Stockwell JD, Doubek JP, Adrian R, Anneville O, Carey CC, Carvalho L, De Senerpont Domis LN, Dur G, Frassl MA, Grossart H, Ibelings BW, Lajeunesse MJ, Lewandowska AM, Llames ME, Matsuzaki SS, Nodine ER, Noges P, Patil VP, Pomati F, Rinke K, Rudstam LG, Rusak JA, Salmaso N, Seltmann CT, Straile D, Thackeray SJ, Thiery W, Urrutia‐Cordero P, Venail P, Verburg P, Woolway RI, Zohary T, Andersen MR, Bhattacharya R, Hejzlar J, Janatian N, Kpodonu ATNK, Williamson TJ & Wilson HL (2020) Storm impacts on phytoplankton community dynamics in lakes. Global Change Biology, 26, 2756–2784. doi: 10.1111/gcb.15033.


[02] Anneville O, Chang CW, Dur G, Souissi S, Rimet F & Hsieh CH (2019) The paradox of re-oligotrophication: The role of bottom-up versus top-down controls on the phytoplankton community. Oikos, 128, 1666–1677. doi: 10.1111/oik.06399.


[01] Perkins DM, Perna A, Adrian R, Cermeño P, Gaedke U, Huete-Ortega M, White EP & Yvon-Durocher G (2019) Energetic equivalence underpins the size structure of tree and phytoplankton communities. Nature Communications, 10, 255. doi: 10.1038/s41467-018-08039-3.


Geisha in the media

Stockwell JD, Doubek JP, Adrian R, Anneville O, et al (2020) Storm impacts on phytoplankton community dynamics in lakes. Global Change Biology, accepted. doi: 10.1111/gcb.15033.

Co-funded by