A5027960230- Atmospheric chemistry and aerosols
- Microbial Community Ecology and Physiology
- Indoor Air Quality and Microbial Exposure
- Atmospheric aerosols and clouds
- Pesticide and Herbicide Environmental Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Polar Research and Ecology
- Spaceflight effects on biology
- Marine and coastal ecosystems
- nanoparticles nucleation surface interactions
- Odor and Emission Control Technologies
- Protist diversity and phylogeny
- Chemistry and Chemical Engineering
- Genomics and Phylogenetic Studies
- Antibiotic Resistance in Bacteria
- Microplastics and Plastic Pollution
- Plant responses to elevated CO2
- Phenothiazines and Benzothiazines Synthesis and Activities
- Algal biology and biofuel production
- Climate Change Communication and Perception
- Air Quality Monitoring and Forecasting
- Enzyme Catalysis and Immobilization
Institut de Chimie de Clermont-Ferrand
2016-2025
Université Clermont Auvergne
2016-2025
Centre National de la Recherche Scientifique
2015-2024
Sigma Clermont
2017-2023
Laboratoire Microorganismes Génome et Environnement
2015-2022
Laboratoire de Météorologie Physique
2013-2020
Observatoire de Physique du Globe de Clermont-Ferrand
2013-2016
Laboratoire de Glaciologie et Géophysique de l’Environnement
2013
Hôpital Bichat-Claude-Bernard
1978-1980
Clouds are key components in Earth's functioning. In addition of acting as obstacles to light radiations and chemical reactors, they possible atmospheric oases for airborne microorganisms, providing water, nutrients paths the ground. Microbial activity was previously detected clouds, but microbial community that is active situ remains unknown. Here, communities cloud water collected at puy de Dôme Mountain's meteorological station (1465 m altitude, France) were fixed upon sampling examined...
Abstract. Long-term monitoring of the chemical composition clouds (73 cloud events representing 199 individual samples) sampled at puy de Dôme (pdD) station (France) was performed between 2001 and 2011. Physicochemical parameters, as well concentrations major organic inorganic constituents, were measured analyzed by multicomponent statistical analysis. Along with corresponding back-trajectory plots, this allowed for distinguishing four different categories air masses reaching summit pdD:...
Abstract. The residence time of bacterial cells in the atmosphere is predictable by numerical models. However, estimations their aerial dispersion as living entities are limited a lack information concerning survival rates and behavior relation to atmospheric water. Here we investigate viability ice nucleation (IN) activity typical active bacteria (Pseudomonas syringae P. fluorescens) when airborne cloud simulation chamber (AIDA, Karlsruhe, Germany). Cell suspensions were sprayed into...
Abstract Clouds constitute the uppermost layer of biosphere. They host diverse communities whose functioning remains obscure, although biological activity potentially participates to atmospheric chemical and physical processes. In order gain information on metabolic microbial in clouds, we conducted coordinated metagenomics/metatranscriptomics profiling cloud water communities. Samples were collected from a high altitude station France examined for content after untargeted amplification...
Abstract. The distribution, abundance and nature of ice nucleation active particles in the atmosphere are major sources uncertainty prediction cloud coverage, precipitation patterns climate. Some biological nuclei (IN) induce freezing at temperatures which most other atmospheric exhibit no detectable activity (> −10 °C). Their actual contribution to pool IN clouds remains poorly known, but numerical studies have suggested a probable significance processes. In this study, water was...
The interplay between microbes and atmospheric physical chemical conditions is an open field of research that can only be fully addressed using multidisciplinary approaches. lack coordinated efforts to gather data at representative temporal spatial scales limits aerobiology help understand large scale patterns global microbial biodiversity its causal relationships with the environmental context. This paper presents sampling strategy analytical protocols developed in order integrate different...
Abstract. For the last 25 years, CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) has evolved to become a full instrumented platform for atmospheric research. It received credentials as national observing in France and is internationally recognized global station GAW (Global Atmosphere Watch) network. reference site of European research infrastructures ACTRIS (Aerosol Cloud Trace gases Research Infrastructure) ICOS (Integrated Carbon Observing System). The located on top puy Dôme mountain (1465 m...
Knowledge on interactions among microbial communities colonizing various streambed substrata (e.g. cobbles, sediment, leaf-litter etc.) is essential when investigating the functioning of stream ecosystems. However, these are often forgotten assessing responses aquatic to chemical contamination. Using a microcosm approach, respective impact two sulfonamide antibiotics (sulfamethoxazole and sulfamethazine) ability heterotrophs decompose alder leaves was investigated in presence or absence...
Abstract. The interest in organic nitrogen and particularly quantifying studying the fate of amino acids (AAs) has been growing atmospheric-science community. However very little is known about biotic abiotic transformation mechanisms clouds. In this work, we measured biotransformation rates 18 with four bacterial strains (Pseudomonas graminis PDD-13b-3, Rhodococcus enclensis PDD-23b-28, Sphingomonas sp. PDD-32b-11, Pseudomonas syringae PDD-32b-74) isolated from cloud water representative...
Biodegradation is competitive with photochemistry, especially in summer and at night. Formic acid the most impacted compound.
Abstract. The respiratory release of CO2 from soils is a major determinant the global carbon cycle. It traditionally considered that this respiration an intracellular metabolism consisting complex biochemical reactions carried out by numerous enzymes and co-factors. Here we show endoenzymes released dead organisms are stabilised in have access to suitable substrates co-factors permit function. These reconstitute extracellular oxidative (EXOMET) may substantially contribute soil (16 48%...
Mesotrione (2‐[4‐(methylsulfonyl)‐2‐nitrobenzoyl]‐cylohexane‐1,3‐dione) is an herbicide brought to the market 15 years ago and commonly used on maize cultures. This review summarizes results obtained from worldwide scientific studies its efficiency, effects, fate in environment, order bring first overall conclusions about safety of use. The comprehensive available literature reveals that mesotrione applied as recommended ensures desired effects sensitive crops, mainly post‐emergence...
A total of 450 bacteria and yeast strains isolated from cloud waters sampled at the puy de Dôme station in France (1465 m) were screened for their ability to produce siderophores. To achieve this, a high-throughput method 96-well plates was adapted CAS (chrome azurol S) method. Notably, 42% isolates siderophore producers. This production examined according phyla tested type chelating functional groups (i.e., hydroxamate, catechol, mixed type). The most active clouds belong γ-Proteobacteria...
Abstract. We present here the results obtained during an intensive field campaign conducted in framework of French “BIO-MAÏDO” (Bio-physico-chemistry tropical clouds at Maïdo (Réunion Island): processes and impacts on secondary organic aerosols' formation) project. This study integrates exhaustive chemical microphysical characterization cloud water March–April 2019 Réunion (Indian Ocean). Fourteen samples have been collected along slope this mountainous island. Comprehensive these is...
While the presence of condensed water in clouds could have influence on diversity bacteria circulating high atmosphere (multiplication or disruption specific taxa), aerosols and been poorly studied comparatively terms microbiological content. Here we investigated airborne bacterial during cloudy clear situations collected throughout year at a mountain site. Samples were using flow rate impingers to examine total cell DNA concentrations, as well by high-throughput sequencing. Overall very...
Abstract. Microorganisms in the atmosphere comprise a small fraction of Earth's microbiome. A significant portion this aeromicrobiome consists bacteria that typically remain airborne for few days before being deposited. Unlike other spheres (e.g., litho-, hydro-, phyllo-, cryospheres), atmospheric are aerosolized, residing individual particles and separated from each other. In atmosphere, encounter chemical physical conditions affect their stress levels survival. This article goes beyond...
Abstract. Airborne microorganisms can remain at altitude for several days, exposed to multiple environmental constraints that prevent or limit microbial activity, the most important of which is probably lack available liquid water. Clouds, i.e., air masses containing water, could offer more favorable conditions. In order investigate influence clouds on functioning airborne microorganisms, we captured aerosols in a nucleic acid preservation buffer from high-altitude mountain meteorological...