A5055969104- Marine and coastal ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Botany and Plant Ecology Studies
- Coastal wetland ecosystem dynamics
- Biological Control of Invasive Species
- Freshwater macroinvertebrate diversity and ecology
- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Atmospheric and Environmental Gas Dynamics
- Fecal contamination and water quality
- Fish Ecology and Management Studies
- Diatoms and Algae Research
- Peatlands and Wetlands Ecology
- Pharmaceutical and Antibiotic Environmental Impacts
- Marine and coastal plant biology
- Aquatic Ecosystems and Biodiversity
- Aquaculture Nutrition and Growth
- Ecology and Vegetation Dynamics Studies
- Biocrusts and Microbial Ecology
- Marine Biology and Ecology Research
- Antibiotic Resistance in Bacteria
- Protist diversity and phylogeny
Centre National de la Recherche Scientifique
2009-2024
Laboratoire Chrono-Environnement
2016-2024
Université de franche-comté
2014-2024
Université Bourgogne Franche-Comté
2022
Rhodes University
2016
Université Clermont Auvergne
2012-2014
La Rochelle Université
2014
Clermont Université
2011-2013
Laboratoire Microorganismes Génome et Environnement
2009-2012
We investigated the effect of food quality on somatic growth and reproduction zooplankton at different temperatures (12°C, 15°C, 20°C, 25°C). Standardized experiments two cladocerans, Daphnia magna Simocephalus vetulus , were performed (1) high‐quality ( Cryptomonas sp.), (2) relatively low‐quality Scenedesmus obliquus ), (3) intermediate‐quality : mixture). Food constraints cladocerans decreased with increasing temperature. For D. for S. differences between clutch size rate individuals fed...
Summary 1. Zooplankton are important in transferring dietary nutrients, including polyunsaturated fatty acids (PUFA), up through aquatic food webs. 2. We tested the hypothesis that taxonomic composition of zooplankton affects retention and subsequent transfer PUFA from upwards web. Using laboratory experiments, we investigated accumulation bioconversion capacities six cladoceran species ( Ceriodaphnia sp., Daphnia longispina , magna pulex Scapholeberis mucronata Simocephalus vetulus ) fed on...
Huge amounts of pollen can accumulate at the air‐water interface during floral bloom wind‐pollinated trees. We hypothesized that such rains act as subsidy pulses, promoting development a neustonic microbial food web and transfer organic carbon to aquatic consumers. During pine rain event on an oxbow lake, microorganism concentrations were by far higher in neuston, where grains accumulated, than seston. Zooplankton species also unevenly distributed two compartments. Bulk isotope isotopes...
Pollen rain can lead to considerable allochthonous particulate organic carbon input into freshwater systems. However, the importance of pollen deposition for zooplankton production has not so far been considered. Here, standardized growth experiments were performed assess quality from three species ( Alnus sp., Populus and Cedrus sp.) as a food source two cladocerans Daphnia longispina Simocephalus vetulus ). Although lipid analysis revealed high polyunsaturated fatty acid (PUFA) contents in...
Abstract The accumulation of pollen grains in freshwater ecosystems may have a significant impact on nutrient dynamics, despite the extracellular wall hampering bacterial degradation and digestion by invertebrates. This is because be readily degraded saprotrophic fungi (Chytridiomycota). We tested laboratory whether free swimming chytrid zoospores grazed zooplankton, transferring pollen‐derived nutrients to zooplankton. conducted grazing growth experiments with daphnids ( Daphnia pulex D....
ABSTRACT The survival and multiplication of human pathogenic antibiotic-resistant bacteria in ecosystems is increasing concern but has been little explored. Wetlands can be contaminated by water fluxes from rivers may present environmental conditions leading to bacterial multiplication. To test this hypothesis, we sampled 16 wetlands located along three the Jura Massif, France. contamination wetland river waters was measured monthly over a one-year cycle together with physico-chemical...
The high species richness of zooplankton communities in macrophytes littoral zones could result from the diversity potential trophic niches found such environment. In zones, addition to phytoplankton, neustonic, benthic and epiphytic biofilms can also be components microcrustacean diet. Here, we investigated ability three large cladocerans: Daphnia longispina, Simocephalus vetulus Eurycercus lamellatus, develop on periphyton as their only food source or a complement phytoplankton resource...
Little attention has been paid to how aquatic habitat characteristics affect the traits of plant species. Nuphar lutea (L.) Sm. is a keystone species distributed across temperate regions Europe, northwest Africa and western Asia. Its apparently low phenotypic variability compared other plants led us test whether exhibited significant trait values correlated environmental parameters. The hypotheses were that (1) variation within our set wetlands (both water sediment characteristics) among...
Over the last decades, intensification of anthropogenic activities and associated disturbances on lake watersheds have led to major changes in lakes trophic functioning through accelerated eutrophication. In many lakes, these are characterized by an unprecedented increase organic carbon fluxes, potentially leading a shift biogeochemical cycles balance between sequestration greenhouse gas emissions. Understanding response cycle natural environmental is becoming crucial challenge context...
Abstract Carbon isotope analysis (δ 13 C) of Daphnia resting‐eggs (ephippia) in sedimentary records can be used to reconstruct past carbon transfers pelagic food webs lakes. However, there may seasonal variability cladoceran δ C and ephippia production that could affect their use as palaeoecological indicators transfers. This is particularly likely stratified lakes where availability different sources seasonal. In addition, are currently no studies on spatial deep areas its implications for...
Intensification of anthropogenic activities in many lake catchments during the twentieth century led to increased autochthonous organic matter sedimentation and degradation hypolimnetic oxygen conditions due intensification heterotrophic processes. These processes can be amplified by effect climate warming on thermal stratification lakes. This study aimed assess how metabolic disruptions affect carbon sources pathways pelagic food webs, focusing methanogenic carbon. The studied lakes showed...
Lentic waters are biogeochemical reactors, producing and receiving carbon (C) originally fixed by the terrestrial aquatic biosphere, which is then buried in sediments or respired back to atmosphere forms of dioxide (CO 2 ) one more potent greenhouse gas (GHG) methane (CH 4 ). Additionally, lakes serve as archives processes within their sediments, enabling reconstruction historical changes spanning thousands years. These encompass alterations land cover, indicated pollen records, soil erosion...
An accurate way to estimate the planktonic food web topology is consider biomass and flows. However, measurements of flows, as production grazing rate, are time-consuming. In this paper, we retrace based on three different degrees information: input flows (production), internal (grazing rate) plankton in freshwater marshes. For that, a meta-analysis datasets from 4 marshes Charente-Maritime (French Atlantic coast) were used, corresponding 47 stations/dates thus geographical temporal...
ABSTRACT Bottom waters hypoxia spreads in many lakes worldwide causing severe consequences on whole trophic network. Here, we aimed at understanding the origin of organic matter stored sediment compartment and related diversity microbial communities a lake with deoxygenated deep water layers. We used geostatistical approach to map compare both variation sediment. Spatialisation C/N ratio δ13C signature suggested that Lake Remoray was characterized by an algal overproduction which could be...
The high species richness of zooplankton communities in macrophytes littoral zones could result from the diversity potential trophic niches found such environment. In zones, addition to phytoplankton, neustonic, benthic and epiphytic biofilms can also be components microcrustacean diet. Here, we investigated ability three large cladocerans: Daphnia longispina, Simocephalus vetulus Eurycercus lamellatus, develop on periphyton as their only food source or a complement phytoplankton resource...