A5037331431- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Environmental DNA in Biodiversity Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Marine and coastal ecosystems
- Aquatic Invertebrate Ecology and Behavior
- Parasite Biology and Host Interactions
- Freshwater macroinvertebrate diversity and ecology
- Marine and fisheries research
- Isotope Analysis in Ecology
- Parasitic Infections and Diagnostics
- Mycorrhizal Fungi and Plant Interactions
- Marine Biology and Ecology Research
- Historical and Environmental Studies
- Plant Pathogens and Fungal Diseases
- Hydrology and Watershed Management Studies
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Aquatic Ecosystems and Biodiversity
- Water Quality and Pollution Assessment
- Algal biology and biofuel production
- Coastal wetland ecosystem dynamics
- Metabolomics and Mass Spectrometry Studies
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2025
Université Savoie Mont Blanc
2021-2025
Rudjer Boskovic Institute
2024
University of Zagreb
2024
Centre Alpin sur les Réseaux Trophiques et Ecosystèmes Lacustre
2009-2024
Wasser Cluster Lunz
2015-2023
Mae Fah Luang University
2023
Centre National de la Recherche Scientifique
2009-2022
Université Clermont Auvergne
2010-2022
Laboratoire Microorganismes Génome et Environnement
2009-2022
Large lakes of the world are habitats for diverse species, including endemic taxa, and valuable resources that provide humanity with many ecosystem services. They also sentinels global local change, recent studies in limnology paleolimnology have demonstrated disturbing evidence their collective degradation terms depletion (water food), rapid warming loss ice, destruction ecosystems, accelerating pollution. particularly exposed to anthropogenic climatic stressors. The Second Warning Humanity...
Summary Water samples were collected along transects from the shore to centre of two French lakes: deep, volcanic, oligomesotrophic and low allochthonic‐impacted Lake Pavin, productive higher Aydat. The biodiversity was analysed using approaches: classical approach consisting cloning/sequencing 18S, ITS1, 5.8S, ITS2 partial 28S region primers designed for fungus sequences, pyrosequencing 18S rRNA hypervariable V2, V3 V5 regions primer sets (one universal eukaryotes one fungi). yielded 146...
We propose a routine protocol based on size fractionation of pelagic samples and the use fluorochrome calcofluor white (which binds to beta-1,3 beta-1,4 polysaccharides) for diagnosing, identifying, counting chitinaceous fungal parasites (i.e., sporangia chytrids) phytoplankton. The was applied freshwater collected during different seasons (spring summer/autumn) in two lakes whose trophic statuses varied. Because few were dates per site), findings are considered preliminary mainly "proof...
Climate change scenarios predict that lake water temperatures will increase up to 4°C and rainfall events become more intense frequent by the end of this century. Concurrently, supply humic substances from terrestrial runoff is expected increase, resulting in darker watercolor ("brownification") aquatic ecosystems. Using a multi-seasonal, low trophic state mesocosm experiment, we investigated how higher temperature brownification affect plankton community composition, phenology, functioning....
Abstract Global climate change scenarios predict lake water temperatures to increase up 4°C and extreme weather events, including heat waves large temperature fluctuations, occur more frequently. Such changes may result in a reorganization of the plankton community structure, causing shifts diversity structure toward dominated by fewer species that are adapted endure warmer irregular conditions. We designed long‐term (8 months) mesocosm experiment explore how ambient ( C : control), induced...
Summary Fungal parasitism is recurrent in plankton communities, especially the form of parasitic chytrids. However, few attempts have been made to study community structure and activity parasites at natural level. To analyse dynamics zoosporic fungal (i.e. chytrids) phytoplankton, samples were collected from February December 2007 two freshwater lakes. Infective chytrids omnipresent lakes, with higher diversity infected phytoplankton than previous studies. The abundance biomass significantly...
Lakes are essential ecosystems that provide a large number of ecosystem services whose quality is strongly impacted by human pressures. Optimal uses lakes require adapted management practices which in turn rely on physico-chemical and biological monitoring. Long-term ecological monitoring provides sets environmental data. When such data available, they have to be associated metadata stored properly accessible useable the scientific community. We present informatics system anyone who requests...
This study is the first assessment of quantitative impact parasitic chytrids on a planktonic food web. We used carbon-based web model Lake Pavin (Massif Central, France) to investigate effects during spring diatom bloom by developing models with and without chytrids. Linear inverse modelling procedures were employed estimate undetermined flows in lake. The Monte Carlo Markov chain linear procedure provided estimates ranges model-derived fluxes. Model results support recent theories probable...
DNA barcoding and metabarcoding is increasingly used to effectively precisely assess monitor biodiversity in aquatic ecosystems. As these methods rely on data availability quality of barcode reference libraries, it important develop follow best practices ensure optimal traceability the metadata associated with barcodes for identification. Sufficient metadata, as well vouchers, corresponding each must be available reliable library curation and, thereby, provide trustworthy baselines...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 62:123-137 (2011) - DOI: https://doi.org/10.3354/ame01448 REVIEW Parasitic fungi of phytoplankton: ecological roles and implications for microbial food webs Serena Rasconi, Marlène Jobard, Télesphore Sime-Ngando* LMGE, Laboratoire Microorganismes: Génome & Environnement, UMR CNRS 6023, Clermont Université, Blaise Pascal,...
Abstract Trophic transfer and retention of dietary compounds are vital for somatic development, reproduction, survival aquatic consumers. In this field study, stable carbon nitrogen isotopes, fatty acids (FA) contents in invertebrates fishes pre‐alpine Lake Lunz, Austria, were used to (1) identify the resource use trophic level Arctic charr ( Salvelinus alpinus ), pike Esox lucius perch Perca fluviatilis brown trout Salmo trutta roach Rutilus rutilus minnow Phoxinus phoxinus ) (2) examine...
This study presents an original rDNA PCR and microscopic survey of pelagic freshwater fungal communities, was designed to unveil the diversity true Fungi (i.e. kingdom Eumycota) in three contrasting lake ecosystems (Lakes Pavin, Aydat Vassivière) located French Massif Central. Three clone libraries were constructed from samples collected euphotic layers lakes during spring 2007. Phylogenetic analysis combined data clustered our sequences into thee divisions: Chytridiomycota (50% total...
Evidence is growing that the surface water temperature increases and duration of ice cover has decreased in many lakes worldwide during past few decades. Here, we present changes ice-cover Lake Lunz from 1921 to 2015 evaluate how fast these occur over time, particular with respect other similar long-term data series. Since 1921, this Austrian subalpine lake increased by 0.8 °C, most intense increase recorded spring summer months (~1–2 °C) less fall (~0.3 °C). The full significantly since...
The dreissenids, quagga mussel Dreissena bugensis and zebra D. polymorpha, are invasive freshwater mussels in Europe North America.These species strongly impact aquatic ecosystems, such as the food web through their high abundance filtration rate.They spread quickly within between waterbodies, have ability to colonize various substrates depths.The invaded established Swiss lakes 1960s, whereas was not detected until 2014.We collected all available data from cantonal well local authorities...
Abstracts of talks presented at ParAqua Conference held in Dubrovnik (Croatia), 16-17 April 2024
ABSTRACT Amplicon sequencing tools such as metabarcoding are commonly used for thorough characterisation of microbial diversity in natural samples. They mostly rely on the amplification conserved universal markers, mainly ribosomal genes, allowing taxonomic assignment barcodes. However, linking classification with functional traits is not straightforward and requires knowledge each group to confidently assign taxa a given trait. Zoosporic parasites highly diverse yet understudied, many...
Despite their obvious importance, our knowledge about the eukaryotic microbial diversity of inland waters is still limited and poorly documented. We applied 18S rDNA amplicon sequencing to provide a comprehensive analysis in 74 low-productivity lakes along 750 km longitudinal transect (5.40-18.52°E) across southern Scandinavia. detected wide pelagic eukaryotes, classified into 1882 operational taxonomic units (OTUs). The highest OTU richness was found traditional phytoplankton groups like...
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...
Theory predicts that morphological and bioenergetic constraints due to temperature‐induced body size reduction can modulate the direct effects of warming on biotic interactions, with consequent trophic cascades biomass distribution. However, these theoretical predictions have rarely been tested empirically. Our aim was distinguish indirect warming‐induced reductions from community structure. We conducted a mesocosm experiment manipulating factorially 1) in medaka fish Oryzias latipes using...
ABSTRACT Studying aquatic microalgae is essential for monitoring biodiversity and water quality. We designed new sets of 18S rRNA PCR primers Chlorophyceae Bacillariophyceae by using the ARB software implementing a virtual program. The results specificity analysis showed that most targeted algal families were identified nontargeted organisms, such as fungi or ciliates, excluded. These newly developed primer also able to amplify microalgal genes from environmental samples with accurate...