A5038425721- Diatoms and Algae Research
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Species Distribution and Climate Change
- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Ecology and Vegetation Dynamics Studies
- Isotope Analysis in Ecology
- Evolution and Genetic Dynamics
- Plant and animal studies
Université de Lorraine
2022-2025
Laboratoire Interdisciplinaire des Environnements Continentaux
2022-2025
Centre National de la Recherche Scientifique
2023-2025
Stress Environnementaux et Biosurveillance des Milieux Aquatiques
2017-2022
Centre d'Études Scientifiques et Techniques d'Aquitaine
2017-2021
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2018-2020
Abstract Understanding the mechanisms that drive beta diversity (i.e. β‐diversity), an important aspect of regional biodiversity, remains a priority for ecological research. β‐diversity and its components can provide insights into processes generating biodiversity patterns. We tested whether environmental filtering or dispersal related predominated along stream watercourse by analysing responses taxonomic functional diatom to spatial factors. examined variation in total (turnover nestedness)...
While it is recognized that biodiversity currently declines at a global scale, we still have an incomplete understanding of local trends under change. To address this deficiency, examined the recent decadal in water quality and (taxonomic functional) key river organisms (diatoms, macroinvertebrates fish) France. We implemented regression, RLQ fourth-corner analyses. Our results showed nutrient loads tended to decrease, diatom richness decline macoinvertebrate increase. The recovery sensitive...
ABSTRACT Aim Co‐occurrence networks can be described in terms of topology (i.e., size and connectance) node degree distribution (NDD). The NDD represents the frequency nodes (species) with k number connections (degree). shape NDD, single‐scale, scale‐free (power‐law) or broad‐scale, reveals if there are species many to other (high‐degree nodes), which may have important ecological functions. However, it remains unknown how spatial extent environmental conditions impact network whether these...
Abstract Aim To quantify the relative contributions of local community assembly processes versus γ‐diversity to β‐diversity, and assess how spatial scale anthropogenic disturbance ( i.e . nutrient enrichment) interact dictate which driver dominates. Location France United States. Time period 1993–2011. Major taxa studied Freshwater stream diatoms. Methods β‐diversity along a enrichment gradient was examined across multiple scales. estimated using multi‐site Sørensen dissimilarity. We...
Abstract Aim The interaction of land use with local versus regional processes driving biological homogenization (β‐diversity loss) is poorly understood. We explored: (a) stream β‐diversity responses to cover (forest agriculture) in terms physicochemistry and physicochemical heterogeneity; (b) whether these were constrained by the species pool, i.e. γ‐diversity, or assembly through (α) diversity; (c) operated abundance distribution (SAD) intraspecific spatial aggregation; (d) dependence on...
Abstract Mass effect, allowing species to persist in unfavourable habitats, and dispersal limitation, preventing from reaching favourable are the two major processes. While limitation can be detected by experimental or modelling techniques, mass effect is more challenging evaluate, which hampers our ability disentangle influence of environment versus on distribution. This undesirable for biomonitoring programs built known species–environment relationships. We developed an approach detection...
Niche conservatism (NC) describes the scenario in which species retain similar characteristics or traits over time and space, thus has potentially important implications for understanding their biogeographic distributions. Evidence consistent with NC includes niche properties across geographically distant regions. We investigated whether was evident stream diatom morphospecies by modeling responses to environmental climatic variables a set of calibration sites (from US) then evaluated models...
In this intercontinental study of stream diatoms, we asked three important but still unresolved ecological questions: (1) What factors drive the biogeography species richness and abundance distribution (SAD)? (2) Are climate-related hypotheses, which have dominated research on latitudinal altitudinal diversity gradients, adequate in explaining spatial biotic variability? (3) Is SAD response to environment independent richness? We tested a number climatic theories hypotheses (i.e.,...
The species-area relationship (SAR) has over a 150-year-long history in ecology, but how its shape and origins vary across scales organisms remains incompletely understood. This is the first subcontinental freshwater study to examine both these properties of SAR spatially explicit way major organismal groups (diatoms, insects, fish) that differ body size dispersal capacity. First, describe shape, we evaluated fit three commonly used models, logarithmic, power, Michaelis-Menten. Second,...
Bioassessment is widely used to measure ecological integrity of natural habitats following anthropogenic disturbances and modifications. Traditionally, bioassessment has been based exclusively on species-environment interactions, i.e. niche processes. However, dispersal processes, in particular mass effect, could mask the influence processes lead erroneous conclusions about ecosystem health. To circumvent this problem, we identified 40 diatom species with distributions driven primarily by...
Eutrophication impairs lake ecosystems at a global scale. In this context, as benthic microalgae are well-established warnings for large range of stressors, particularly nutrient enrichment, the Water Framework Directive required development diatom-based methods to monitor eutrophication. Here, we present index developed French lakes, named IBDL (Indice Biologique Diatomées en Lacs). Data were collected in 93 lakes from 2015 2020. A challenge arose discontinuous pressure gradient our...
Abstract Eutrophication impairs lake ecosystems at a global scale. In this context, as benthic microalgae are well-established warnings for large range of stressors, particularly nutrient enrichment, the Water Framework Directive required development diatom-based methods to monitor eutrophication. Here, we present index developed French lakes, named IBDL. Data were collected in 93 lakes from 2015 2020. A challenge arose discontinuous pressure gradient our dataset, especially low number...