A5034106454- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Marine and fisheries research
- Freshwater macroinvertebrate diversity and ecology
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Hydrology and Watershed Management Studies
- Wildlife Ecology and Conservation
- Ecology and biodiversity studies
- Forest Management and Policy
- Economic and Environmental Valuation
- Environmental Conservation and Management
- Fish biology, ecology, and behavior
- Mathematical and Theoretical Epidemiology and Ecology Models
- Animal Ecology and Behavior Studies
- Insurance, Mortality, Demography, Risk Management
- Transboundary Water Resource Management
- Environmental Toxicology and Ecotoxicology
- Environmental Science and Water Management
- Coastal wetland ecosystem dynamics
- Rangeland Management and Livestock Ecology
- Complex Systems and Decision Making
- French Urban and Social Studies
- International Environmental Law and Policies
- Soil and Water Nutrient Dynamics
Laboratoire National Henri Becquerel
2018-2023
Laboratoire National de Santé
2018-2023
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2022
Électricité de France (France)
1998-2018
EDF Energy (United Kingdom)
2016
Environnements et Paléoenvironnements Océaniques et Continentaux
1998
Abstract The real impact on downstream fish populations of a change in management hydropower installation, particular, the an increase instream minimum flow, can be difficult to assess. Other factors, addition simple habitat limitations low‐flow periods, influence evolution population over time. It has often observed French streams that 0+ individuals appear limited by strong discharge first months after their emergence (March May). A dynamic model trout (MODYPOP) been applied river Roizonne...
Abstract Despite the many habitat simulations that have been undertaken around world, not enough biological monitoring has performed following flow manipulations. It is difficult, however, to refine management decisions without a better understanding of links between amounts, durations and seasonality deliveries population dynamics. Trout populations were monitored before after alterations in five trout streams, involving 17 study sites over 4‐ 12‐year period, depending on sites. A...
Hydropeaking corresponds to rapid artificial discharge variations, designed address sub-daily peaks in electricity demand. It generates changes physical habitat (e.g., flow velocity and water depth) with potential impacts on stream assemblages. For assessing the generality of hydropeaking effects fish assemblages, we present an original combination spatial (among 45 reaches, including six groups nearby reaches) temporal (over 3-17 years) analyses these effects. Our involved descriptions...
Abstract A dynamic population model was developed to study the impact of biotic and abiotic environmental factors on changes in trout populations. The is based Leslie Matrix simulates change by age class terms biological parameters (i.e. fish survival, fertility, growth rates), which are dependent conditions. Changes physical habitat, expressed as Weighted Usable Area, cause displacement increased mortality. Calculations were made at 1‐month intervals account for effect climatic variations...
Abstract Fish stranding in rivers, due to rapid shoreline dewatering, often occurs during the down‐ramping phase of hydropeaks, which enables peak energy production. Multiple hydropeaking characteristics and river morphology influence stranding, but little is known about effects riverbed microstructures. Our goal was identify how combination occurrence morphological microstructures (e.g., puddles scour pools) influences fish stranding. For this purpose, we used an extensive dataset...
Abstract Changes in a brown trout ( Salmo trutta L.) population result from interaction among various mechanisms which are dependent on environmental conditions and biotic processes. In reaches influenced by the presence of dams, instream flow bypassed section is not only parameter affects population. Flood episodes, general connectivity section, characteristics substrate define availability quality spawning grounds may also have crucial impact. The design fine‐tuning tools take parameters...
Environmental factors may cause synchronous density variations between populations. A better understanding of the processes underlying synchrony is fundamental to predicting resilience loss in metapopulations subject environmental change. The present study investigated determinants time series three age groups resident brown trout (Salmo trutta) (0+, 1+, and adults) 36 stream reaches. Mantel tests were implemented disentangle relative effects on geographical proximity, key variables...
Abstract Hydropeaking hydropower plants are the main source of renewable energy, meeting sub‐daily peaks in electricity demand. They induce rapid artificial flow variations, highly variable velocities, drift, and stranding risks for aquatic organisms. In hydropeaking reaches, microhabitat selection likely depends on both present past hydraulics (flow velocity water depth); this study aims to assess their relative impact. For purpose, we used observations fish abundance 1,180 microhabitats...
Downstream of hydroelectric plants, hydropeaking can cause frequent flow variations, resulting in habitat modifications (e.g. hydraulics, reach morphology, temperature, water quality), which impact organisms (stranding, dewatering, forced drift, growth disturbances) and ultimately may have negative lasting impacts on biological communities, reducing resilience. Nevertheless, the severity disturbances vary depending other existing pressures local site conditions, need to be taken into account...
A mathematical model representing the long‐term change in a trout population under different river management scenarios is presented. It describes structure of broken down into age classes based on Leslie matrix; if for any given month known, should be able to estimate that following month. The passage from one next takes account various relevant factors: survival rate individuals classes; fertility females; linear and weighted growth rates; displacement linked habitat fluctuations using...
The Instream Flow Incremental Methodology (IFIM) was developed to determine flows that must be maintained downstream of hydropower plants preserve aquatic populations. It is based on the hypothesis characteristics habitat in periods low flow have a crucial impact dynamics these Other parameters may also affect populations include: water quality, temperature, flood episodes, strategies for stocking, fishing, etc. Dynamic models fish are now being an attempt integrate all factors. model...
Abstract The key role of hydrological variability in structuring brown trout populations is well established. However, the influence additional drivers more difficult to identify. implementation long‐term monitoring and development reliable tools can help reveal fine local fish contrasted flow regimes. This study used data series for nine reaches monitored nineteen years four French salmonid streams. Study were within five bypassed sections influenced by instream flow. A deterministic...
Successful management and protection of wild animal populations relies on good understanding their life cycles. Because population dynamics depends intricate interactions biological ecological processes at various scales, new approaches are needed that account for the variability demographic associated parameters in a hierarchy spatial scales. A hierarchical Bayesian model resident brown trout (Salmo trutta) cycle was built to assess relative influence local general determinants mortality....
In the middle of 1980s, relicensing numerous hydropower-plants led to widespread studies influence discharge on trout populations. particular, specific efforts were made adapt and validate PHABSIM microhabitat component Instream Flow Incremental Methodology (IFIM) French rivers. IFIM is now widely used in France impact for hydropower installations, determine instream flow be recommended bypassed sections meet requirements water resource legislation salmonids. This paper presents presently...
Deux types d’approches techniques complémentaires sont utilisées pour guider l’établissement des débits écologiques, à l’échelle tronçons de cours d’eau (ex. : réservés) comme bassins versants objectifs d’étiage). Les approches « hydrologiques » visent quantifier les altérations multiples caractéristiques du régime hydrologique et reposent sur l’identification (délicate) relations empiriques entre biologiques. habitat hydraulique », ciblées bas moyens, couplent modèles hydrauliques...
Afin d'évaluer l'impact des différents usages de l'eau sur l'écosystème aquatique, outils simulation plus en nombreux voient actuellement le jour ; dans ce cadre, un modèle dynamique population truite (Salmo trutta) est cours développement. Pour enrichir les nombreuses observations déjà disponibles bassin l'Oir (Basse-Normandie), inventaires assortis d'expérimentations spécifiques ont été effectués 1996 pour conforter et compléter différentes composantes du modèle, particulier qui concerne...
Most studies of brown trout (Salmo trutta) populations in headwater streams have focused on the year-to-year variability recruitment and survival, but only few analyzed long-term trends densities, under both control regulated flow conditions. Here, we conducted trend analyses age class densities 36 stream reaches over 1990-2020 period, including located a bypassed section. We also investigated panel key environmental variables (water temperature, flow, current velocity habitat suitability)....
Le retour au premier plan de la notion santé des écosystèmes met en évidence préoccupation société à mettre œuvre mesures pour protection milieux anthropisés. Les critères d'évaluation peuplements piscicoles mis sont rarement débattus sein communauté scientifique. L'exercice proposé ici devait permettre d'avoir ce débat sur truite commune (<i>Salmo trutta<i/>), espèce phare cours d'eau situés tête bassin, qui représentent majorité du réseau hydrographique français. La démarche visait...
A dynamic population model was developed to study the impact of biotic and abiotic environmental factors on changes in trout populations. The is based Leslie Matrix simulates change by age class terms biological parameters (i.e. fish survival, fertility, growth rates), which are dependent conditions. Changes physical habitat, expressed as Weighted Usable Area, cause displacement increased mortality. Calculations were made at 1-month intervals account for effect climatic variations...
L'hydroélectricité est une source importante d'énergie renouvelable pour la production électrique en Europe et dans le monde. Tout étant flexible permettant stockage de l'énergie, l'hydroélectricité facilite également l'intégration des énergies intermittentes au sein du système électrique. Le développement, l'opération manutention hydroélectrique sont étroitement liés à préoccupations croissantes concernant durabilité environnementale, l'atténuation changement climatique réponse aux besoins...
Fish stranding in rivers, due to rapid shoreline dewatering, often occurs during the down-ramping phases of hydropeaks enabling peak energy production. Multiple hydrological characteristics hydropeaking and river morphology influence stranding, but little is known about their relative effects. The goal our study identify how combination occurrence morphological microstructure (e.g., puddles, scour pools) fish stranding. For this purpose, we used an extensive dataset observations collected...