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Harmful algal blooms threaten lake and reservoir ecosystems and ecosystem services worldwide. Until lake water quality is improved, early warning systems are needed to protect populations. In shallow lakes, wind mixing enhances nutrient diffusion and particle resuspension from the sediment. This internal nutrient load is often larger than the external load from inflows, and is a key for good predictions of harmful algal blooms. Its intermittency makes continuous measurements necessary, but current measurements are either discrete or indirect. During this project, we set up a direct continuous measuring system for the nutrient release from the sediment of shallow lakes.
I studied physics at Ecole normale supérieure in Paris and did a PhD at Paris-Sud University about phase transitions in goethite suspensions, a mineral liquid crystal. I graduated in environmental engineering at Ecole des Ponts ParisTech. In 2004-2008, I managed a technical team specialized in port and waterways planning at the ministry for transport and contributed to European research projects. Since 2008, I am associate professor in hydrology at AgroParisTech. My research at the Water, Environment and Urban Systems Laboratory, through field measurement and numerical modelling, focuses on the physical functioning of lakes and its importance for understanding and predicting phytoplankton blooms. I contribute to the development of early warning systems. During my AgreenSkills fellowship, we showed the theoretical feasibility of an innovative technique, relaxed eddy accumulation, to measure continuously the nutrient release from the sediment, a main driver of proliferations. We are now developing a prototype, before systematic measuring campaigns.
Bruno J. Lemaire, Christian Noss, Andreas Lorke., 2017. Toward relaxed eddy accumulation measurements of sediment-water exchange in aquatic ecosystems. Geophysical Research Letters, 44 (17), 8901-8909.
Ali Fadel, Bruno J. Lemaire, Brigitte Vinçon-Leite, Ali Atoui, Kamal Slim, et Bruno Tassin, 2017. On the successful use of a simplified model to simulate the succession of toxic cyanobacteria in a hypereutrophic reservoir with a highly fluctuating water level. Environmental Science and Pollution Research, 24 (26), 20934-20948.
Kerimoglu, O; Jacquet, S; Vincon-Leite, B; Lemaire, BJ; Rimet, F; Soulignac, F; Trevisan, D; Anneville, O, 2017. Modelling the plankton groups of the deep, peri-alpine Lake Bourget. Ecological Modelling 359, 415-433. Doi: 10.1016/j.ecolmodel.2017.06.005.
Frédéric Soulignac, Brigitte Vinçon-Leite, Bruno J. Lemaire, José R. Scarati Martins, Céline Bonhomme, Philippe Dubois, Yacine Mezemate, Ioulia Tchiguirinskaia, Daniel Schertzer, Bruno Tassin. 2017. Performance Assessment of a 3D Hydrodynamic Model Using High Temporal Resolution Measurements in a Shallow Urban Lake. Environmental Modeling & Assessment, 22 (4), 309-322.
Talita Silva, Alessandra Giani, Cléber Figueredo, Priscilla Viana, Viet Tran Khac, Bruno J. Lemaire, Bruno Tassin, Nilo Nascimento, Brigitte Vinçon-Leite, 2016. Comparison of cyanobacteria monitoring methods in a tropical reservoir by in vivo and in situ spectrofluorometry. Ecological Engineering, 94, 79-87.