A5013434115- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Water Quality and Pollution Assessment
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Oceanographic and Atmospheric Processes
- Hydrology and Sediment Transport Processes
- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Cyclone Separators and Fluid Dynamics
- Urban Stormwater Management Solutions
- Fecal contamination and water quality
- Geology and Paleoclimatology Research
- Soil erosion and sediment transport
- Spacecraft and Cryogenic Technologies
- Thermochemical Biomass Conversion Processes
- Freshwater macroinvertebrate diversity and ecology
- Granular flow and fluidized beds
- Iron and Steelmaking Processes
- Water Quality Monitoring and Analysis
- Combustion and Detonation Processes
- Genomics and Phylogenetic Studies
- Thermal and Kinetic Analysis
- Hydrology and Drought Analysis
- Microbial Community Ecology and Physiology
École Polytechnique Fédérale de Lausanne
2018-2023
Centre d’Etudes Politiques Et sociaLes
2023
Université Savoie Mont Blanc
2018-2019
Laboratoire Eau, Environnement et Systèmes Urbains
2014-2018
University of California, Santa Barbara
2018
Oranim Academic College of Education
2018
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2018
Hospital Universitário da Universidade de São Paulo
2017
Institut National de la Recherche Agronomique du Niger
2015
Paris-Est Sup
2014
Abstract. Long-term effects of climate change on lakes globally will include a substantial modification in the thermal regime and oxygen solubility lakes, resulting alteration ecosystem processes, habitats, concentrations critical substances. Recent efforts have led to development long-term model projections lake regimes solubility. However, such are hardly ever confronted with observations extending over multiple decades. Furthermore, global-scale forcing parameters models present several...
Over the past decade, neutral theory has gained attention and recognition for its capacity to explain bacterial community structure (BCS) in addition deterministic processes. However, no clear consensus been drawn so far on their relative importance. In a metacommunity analysis, we explored at regional local scale effects of these processes assembly within water column 49 freshwater lakes. The BCS was assessed using terminal restriction fragment length polymorphism (T-RFLP) 16S rRNA genes....
Abstract River–lake transition zones have been identified as major drivers of phytoplankton growth. With climate change reducing the frequency complete lake overturns, it is expected that Rhône River, main tributary to Lake Geneva (France/Switzerland), will become source nutrients for euphotic zone. The river–lake zone was hence examined at mouth River with aim understanding complexities and controls distribution in this specific deltaic ecosystem. Two field campaigns were carried out which...
Abstract Freshwater algae exhibit complex dynamics, particularly in meso-oligotrophic lakes with sudden and dramatic increases algal biomass following long periods of low background concentration. While the fundamental prerequisites for blooms, namely light nutrient availability, are well-known, their specific causation involves an intricate chain conditions. Here we examine a recent massive Uroglena bloom Lake Geneva (Switzerland/France). We show that certain sequence meteorological...
River inflows have a major influence on lake water quality due to their input of sediments, nutrients and contaminants. After leaving the river channel, waters form plume interact with ambient waters. Strong hydrodynamic changes take place in nearfield. To determine nearfield hydro-sedimentary dynamics negatively-buoyant Rhône thermally stratified Lake Geneva, field campaigns were carried out at high intermediate discharge. High-resolution full-depth Acoustic Doppler Current Profiler (ADCP)...
Abstract Based on field investigations carried out in Lake Geneva during summer stratification 2019, this study documents, for the first time, rapid change of negatively buoyant river inflow dynamics caused by passing a coastal upwelling. Under calm conditions, Rhône River, entering at eastern end lake, interacts with lake density profile such that intrusion moves as an interflow thermocline layer straight into lake. A strong, large‐scale spatially homogeneous wind lasts several days causes...
This study deals with the impact of spatio-temporal heterogeneities on assessment lake ecological status according to European water framework directive (WFD). A method, based three-dimensional coupled hydrodynamic and modeling, is presented assess variability status, locate most representative sampling station Lake Geneva (France/Switzerland). Five variables used in evaluation were simulated by using free software Delft3D. The numerical simulation results showed that chlorophyll a total...
Abstract. In large lakes subject to the Coriolis force, basin-scale gyres and mesoscale eddies, i.e. rotating coherent water masses, play a key role in spreading biochemical materials energy throughout lake. order assess spatial temporal extent of their dynamics vertical structure, as well validate prediction numerical simulation results, detailed transect field observations are needed. However, at present it is difficult forecast when where such should be taken. To overcome this problem,...
Lake water quality assessment requires quantification of phytoplankton abundance. Optical satellite imagery allows us to map this information within the entire lake area. The ESA Climate Change Initiative (ESA-CCI) estimates Chl-a concentrations, based on medium resolution data, a global scale. concentrations provided by ESA-CCI consortium were analyzed assess their representativeness for monitoring and subsequent phenology studies in Geneva. Based vertically resolved in-situ those datasets...
Abstract Despite global evidence of lake deoxygenation, its duration, timing, and impacts over decadal to centennial timescales remain uncertain. This study introduces a novel model approach using 150 yr limnological paleolimnological data evaluate the anthropogenic on deep oxygen in Lake Geneva. Results highlight an increase consumption rates due cultural eutrophication, initially triggering historical hypoxia, subsequently exacerbated by reduced winter mixing induced climate change....
Abstract Climate change is altering thermal stratification in lakes worldwide. Reduction winter mixing lead to prolonged oxygen depletion, lasting for years centuries, potentially becoming permanent. Although there convincing evidence of lake deoxygenation globally, its duration, timing, and impacts over decadal centennial timescales remain uncertain. Here, we introduce a novel model-data assimilation approach using 150 limnological paleolimnological data evaluate the anthropogenic impact...
Abstract. Gyres and eddies, i.e., large-scale rotating coherent water masses, are prominent features of large lakes oceans, formed due to the interplay between Coriolis force wind stress. Understanding their dynamics is important as they known play a crucial role in spreading bio-chemical materials energy throughout oceans. Since field observations sparse time location, often limited few moorings, cannot provide comprehensive validation dataset for such current systems. Previous numerical...
Abstract. Climate change modifies the thermal regime and oxygen solubility of lakes globally, resulting in alteration ecosystem processes, lake habitats concentrations key parameters. The use one-dimensional (1D) model for global scale studies has become standard research to evaluate effects climate change. However, such approach requires forcing parameters which have several limitations that are barely discussed, as need serious downscaling. Furthermore, projections lakes' hardly ever...