A5024538322- Soil Carbon and Nitrogen Dynamics
- Nematode management and characterization studies
- Microbial Community Ecology and Physiology
- Agronomic Practices and Intercropping Systems
- Legume Nitrogen Fixing Symbiosis
- Agriculture and Rural Development Research
- Invertebrate Taxonomy and Ecology
- Biofuel production and bioconversion
- Gut microbiota and health
- Genomics and Phylogenetic Studies
- Composting and Vermicomposting Techniques
- Enzyme Catalysis and Immobilization
- Agriculture, Soil, Plant Science
- Agriculture Sustainability and Environmental Impact
- Polar Research and Ecology
- French Urban and Social Studies
- Insect and Arachnid Ecology and Behavior
- Forest Ecology and Biodiversity Studies
- Environmental DNA in Biodiversity Studies
- Cassava research and cyanide
- Soil and Land Suitability Analysis
- Bioenergy crop production and management
- Silicon Effects in Agriculture
- Anaerobic Digestion and Biogas Production
- Bioeconomy and Sustainability Development
Université de Montpellier
2018-2025
Ecologie fonctionnelle & biogéochimie des sols & des agro-systèmes
2015-2025
Institut de Recherche pour le Développement
2011-2025
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2014-2025
Institut Agro Montpellier
2014-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2021-2024
University of Antananarivo
2018-2024
Agropolis International
2024
L'Institut Agro
2021-2023
Université Joseph Ki-Zerbo
2015-2016
ABSTRACT In soil, the link between microbial diversity and carbon transformations is challenged by concept of functional redundancy. Here, we hypothesized that redundancy may decrease with increasing source recalcitrance coupling C cycling change accordingly. We manipulated to examine how affects decomposition easily degradable (i.e., allochthonous plant residues) versus recalcitrant autochthonous organic matter) sources. found a in (i) affected both sources, thereby reducing global CO 2...
Abstract The priming effect (PE) is a key mechanism contributing to the carbon balance of soil ecosystem. Almost 100 years research since its discovery in 1926 have led rich body scientific publications identify drivers and mechanisms involved. A few review articles summarised acquired knowledge; last major one was published 2010. Since then, knowledge on microbial communities involved PE + C sequestration has been considerably renewed. This article reviews current state what extent new...
Abstract Soil enzymes are central to ecosystem processes because they mediate numerous reactions that essential in biogeochemical cycles. However, how soil enzyme activities will respond global warming is uncertain. We reviewed the literature on mechanisms linking temperature effects and microbial communities, outlined a conceptual overview these changes may influence carbon fluxes terrestrial ecosystems. At scale, although can have positive effect enzymatic catalytic power short term (i.e....
This work is the first report on use of DNA-, RNA-SIP approaches to elucidate dynamics and diversity bacterial populations actively assimilating C derived from plant residues labelled at more than 90% (13)C. Wheat-residues, were incorporated incubated into soil microcosms for 28 days. At end incubation time, no 55% total CO(2) released was (13)C-labelled, suggesting occurrence an important priming effect process. After 7 days, 30% whole DNA extracted labelled, allowing efficient separation...
Abstract Summary NanoASV is a conda environment and snakemake-based workflow using state of the art bioinformatics software to process full-length SSU rRNA (16S/18S) amplicons acquired with Oxford Nanopore Sequencing technology. Its strength lies in reproducibility, portability possibility run offline, allowing in-field analysis. It can be installed on MK1C sequencing device data locally. Availability Source code documentation are freely available at https://github.com/ImagoXV/NanoASV –...
Although involved in key functions of the terrestrial ecosystems, activity and diversity soil microorganisms can be severely limited by energy nutrients weathered tropical soils. To optimize nutrient cycling for crop nutrition, assessing which limit microbial food web is thus essential. This was our aim this study carried out on a ferrallitic from natural grassland Madagascar. For purpose, we employed an innovative nutrient-omission approach microcosms to test distinct effects omitting C,...
An optimized method, based on the coupling of two commercial kits, is described for extraction soil nucleic acids, with simultaneous and purification DNA RNA following a cascade scheme avoiding use harmful solvents. The protocol canmonitor variations in recovery yield from soils various types.The quantitative version was obtained by testing starting quantity, grinding parameters final elution volumes, order to avoid saturation both kits.•A first soil-crushing step liquid nitrogen could be...
In the Highlands of Madagascar, providing organic amendments (OAs) is main farmer fertilization practice in upland rainfed agrosystems dominated by nutrient-depleted Ferralsols. Therefore, enhancing performance OAs on plant functions particularly important for improving both productivity and agrosystem sustainability. Earthworms are well-known ecosystem engineers involved decomposition matter play a critical role nutrient turnover. Inoculating earthworms could be promising approach to...
A soil microcosm experiment was conducted to evaluate the influence of copper contamination on dynamics and diversity bacterial communities actively involved in wheat residue decomposition. In presence copper, a higher level CO(2) release observed, which did not arise from greater decomposition but stimulation organic matter mineralization (known as priming effect). Such functional modifications may be related significant active populations characterized using DNA stable-isotope probing approach.
The effects of earthworm inoculation and cropping systems on upland rice were examined over a four-year period in the Highlands Madagascar. Each year, endogeic earthworms Pontoscolex corethrurus (Rhinodrilidae) inoculated (EW+) at density 75 ind m−2 or not (EW0). Inoculation was tested three systems: conservation agriculture (CA) traditional tillage with without residues restitution. Soil plant properties measured during first years while soil biological assessed fourth year. At end...
Description du sujet. Au niveau d’une commune péri-urbaine à Madagascar, un dispositif de recherche-action en partenariat a pour objectif d’améliorer l’offre fertilisation organique par le lombricompostage. Objectifs. Un inventaire des ressources végétales potentiellement mobilisables lombricompostage été premièrement effectué au cours trois saisons agricoles. Méthode. Une capitalisation savoirs locaux effectuée associant enquêtes individuelles et ateliers collectifs regroupant 42...