
Vincent TardyBioSEC
Vincent Tardy
PhD
Microbial ecologist & creator of BioSEC services
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28
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Introduction
Additional affiliations
March 2019 - present
June 2017 - December 2018
April 2015 - December 2016
Publications
Publications (28)
Lake ecosystems contribute significantly to atmospheric methane and are likely to become even bigger methane emitters with the global spread of hypoxia/anoxia in freshwater ecosystems. Here we characterized the spatial heterogeneity of methane production potential, methane concentration, archeal and bacterial communities across Lake Remoray sedimen...
1. Carbon isotope analysis (δ 13 C) of Daphnia resting-eggs (ephippia) in sedimen-tary records can be used to reconstruct past carbon transfers in pelagic food webs in lakes. However, there may be seasonal variability of cladoceran δ 13 C and ephippia production that could affect their use as palaeoecological indicators of pelagic carbon transfers....
Lake ecosystems contribute significantly to atmospheric methane and are likely to become even bigger methane emitters with the global spread of hypoxia/anoxia in freshwater ecosystems. Here we characterized the spatial heterogeneity of methane production potential, methane concentration, archaeal and bacterial and methanogen communities across Lake...
Bottom waters hypoxia spreads in many lakes worldwide causing severe consequences on whole lakes trophic network. Here, we aimed at understanding the origin of organic matter stored in the sediment compartment and the related diversity of sediment microbial communities in a lake with deoxygenated deep water layers. We used a geostatistical approach...
Pharmaceutical industry effluents are complex and highly variable in time. Assessing the efficiency of a pharmaceutical industry wastewater treatment plant (WWTP) and the resulting decrease in effluent toxicity and ecological risk is thus not straightforward. We set up an original in situ pilot directly connected to a pharmaceutical WWTP to monitor...
Sediment microbial communities were exposed for 21 days to an environmental concentration of copper to assess Cu-induced composition changes and resulting effects on microbial sensitivity to acute Cu and As toxicity. Chronic Cu exposure reduced the diversity of the bacterial and archaeal communities from Day 0 to Day 21. The pollution-induced commu...
Passive treatment based on iron biological oxidation is a promising strategy for Arsenic (As)-rich acid mine drainage (AMD) remediation. In the present study, we characterized by 16S rRNA metabarcoding the bacterial diversity in a field-pilot bioreactor treating extremely As-rich AMD in situ, over a 6 months monitoring period. Inside the bioreactor...
A field-pilot bioreactor exploiting microbial iron (Fe) oxidation and subsequent arsenic (As) and Fe co-precipitation was monitored during 6 months for the passive treatment of As-rich acid mine drainage (AMD). It was implemented at the Carnoulès mining site (southern France) where AMD contained 790–1315 mg L−1 Fe(II) and 84–152 mg L−1 As, mainly a...
Arsenic removal consecutive to biological iron oxidation and precipitation is an effective process for treating As-rich acid mine drainage (AMD). We studied the effect of hydraulic retention time (HRT)—from 74 to 456 min—in a bench-scale bioreactor exploiting such process. The treatment efficiency was monitored during 19 days, and the final mineral...
Microbial oxidation of iron (Fe) and arsenic (As) followed by their co-precipitation leads to the natural attenuation of these elements in As-rich acid mine drainage (AMD). The parameters driving the activity and diversity of bacterial communities responsible for this mitigation remain poorly understood. We conducted batch experiments to investigat...
Using organic waste products (OWP) in agriculture makes it possible to increase productivity with less use of mineral fertilizers. However, the lasting effect on soil microbial communities of an OWP application repeated over several years needs further investigation. In the present study, soils were sampled from two long-term field experiments: Qua...
Arsenic (As) is a toxic element ubiquitous in acid mine drainage (AMD). It represents a threat for freshwater ressources in the vicinity of closed and active mines. Passive bioremediation techniques based on biological iron (Fe) oxidation represent an opportunity to treat efficiently and economically this kind of pollution. A field bioreactor was i...
Passive water treatments based on biological attenuation can be effective for arsenic-rich acid mine drainage (AMD). However, the key factors driving the biological processes involved in this attenuation are not well-known. Here, the efficiency of arsenic (As) removal was investigated in a bench-scale continuous flow channel bioreactor treating As-...
Contrasting microbial community composition and activity at different soil depths may affect root litter decomposition. These effects have up to now been investigated mainly in laboratory studies, which may not be able to take into account complex in situ conditions. Our study aimed to analyze the composition and activity of microbial communities a...
Arsenic is one of the most hazardous elements associated to acid mine drainage with concentrations ranging from ≤ 1 µg L-1 to hundreds of mg L-1 in these leachates. To date, there is no affordable method to efficiently treat As-rich AMD over the long term. Natural attenuation processes based on oxidation of iron and arsenic by autochthonous bacteri...
Arsenic (As) is one of the most toxic pollutants commonly associated with mine tailings and Acid Mine Drainage (AMD), with concentration ranging from < 1 µg.L-1 to hundred mg.L-1 in mine water [1]. Considering the toxicological effects of Arsenic on organisms, it is essential to develop remediation strategies specifically dedicated to the treatment...
Soil microbial communities undergo rapid shifts following modifications in environmental conditions. Although microbial diversity changes may alter soil functioning, the in situ temporal dynamics of microbial diversity is poorly documented. Here, we investigated the response of fungal and bacterial diversity to wheat straw input in a 12-months fiel...
Les communautés microbiennes sont des acteurs majeurs du fonctionnement biologique du sol à travers notamment leur implication dans les transformations des cycles biogéochimiques (C, N, P…). Dans les agro-écosystèmes, la diversité de ces communautés est régulièrement modifiée par des perturbations liées aux pratiques agricoles et la question des co...
Soils are living environments in which particularly abundant and diverse microbiome and fauna are evolving. The resulting biological functioning has a direct impact not only on soil fertility but also on a series of ecosystems services. Thus, microbial communities are involved in geochemical cycles in which microbial enzymes catalyse the different...
Despite the central role of microbes in soil processes, empirical evidence concerning the effect of their diversity on soil stability remains controversial. Here, we addressed the ecological insurance hypothesis by examining the stability of microbial communities along a gradient of soil microbial diversity in response to mercury pollution and heat...
SPE EA EcolDur GenoSol MERS IPM Résumé du livre : La fertilité des sols est au carrefour des enjeux de sécurité alimentaire, de protection de l’environnement et de rentabilité économique de l’activité agricole. Cet ouvrage présente les résultats d’une réflexion prospective sur le contexte de la fertilisation dans les 5-10 ans à venir. Il définit le...
An autotrophic, hydrogenotrophic methanogen, designated strain 17A1(T), was isolated from the profundal sediment of the meromictic Lake Pavin, France. The cells of the novel strain, which were non-motile, Gram-staining-negative rods that measured 2-15 µm in length and 0.2-0.4 µm in width, grew as filaments. Strain 17A1(T) grew in a mineral medium a...