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Your search keyword '"Nicolas Fernandez Nuñez"' showing total 2 results
Start Over Author "Nicolas Fernandez Nuñez" Topic 0106 biological sciences
2 results on '"Nicolas Fernandez Nuñez"'

1. Do diversity of plants, soil fungi and bacteria influence aggregate stability on ultramafic Ferralsols? A metagenomic approach in a tropical hotspot of biodiversity

Author

Nicolas Fernandez Nuñez, Julien Demenois, Fabian Carriconde, Luis Merino-Martín, Alexia Stokes, Agroécologie et Intensification Durables des cultures annuelles (UPR AIDA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut Agronomique Néo-Calédonien (IAC), and Equipe Sol & Végétation

Subjects
0106 biological sciences, Ferralsol, Ultramafic substrates, Biologie du sol, Biodiversity, Soil Science, F62 - Physiologie végétale - Croissance et développement, Soil metagenomic, Conservation des sols, Plant Science, Ecological succession, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, 01 natural sciences, Système racinaire, Faune du sol, Diversity index, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, New Caledonia, Saprotroph, Shannon index, Restoration ecology, Simpson index, 2. Zero hunger, Ecology, fungi, P34 - Biologie du sol, Plant community, 04 agricultural and veterinary sciences, Soil carbon, 15. Life on land, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, humanities, 13. Climate action, Metagenomics, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Environmental science, P01 - Conservation de la nature et ressources foncières, Species richness, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, human activities, 010606 plant biology & botany
Abstract

International audience; Aims: Understanding how soil aggregate stability (MWD) is influenced by microbial diversity and abundance can be crucial for ecological restoration in severely disturbed areas. We investigated the relationships between plant and soil microbial diversity and MWD of an ultramafic Ferralsol along a vegetational succession gradient in New Caledonia, where wildfires and extensive nickel mining have degraded the landscape. Methods: Five plant communities were studied. For each one, MWD, soil physicochemical parameters (e.g. soil organic carbon (SOC)), plant root traits and fungal abundance were measured. The diversity and structure of plant and microbial communities were respectively assessed via botanical inventories and a metagenomic approach. A generalized linear model (GLM) was used to assess the influence of diversity indexes on MWD. Constrained ordinations (CCA) were performed to assess the influence of communities' structures on MWD. Results GLM highlighted the linkage between SOC and MWD but did not identify any significant influence of diversity indexes on MWD. CCA revealed a significant influence of communities' structures, especially the abundance of saprotrophic fungi, on MWD. Conclusions: We showed that the structure, but not species richness and diversity of plants, soil fungi and bacteria influence aggregate stability on Ferralsols.

Published
2020
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2. Potential of high-throughput eDNA sequencing of soil fungi and bacteria for monitoring ecological restoration in ultramafic substrates: The case study of the New Caledonian biodiversity hotspot

Author

Kelly Letellier, Pierre Mournet, Laurent Maggia, Pierre-Louis Stenger, Nicolas Fernandez Nuñez, Mélanie Lelievre, Aurore Manez, Sarah Gigante, Fabian Carriconde, Julie Ripoll, Institut de sciences exactes et appliquées (ISEA), Université de la Nouvelle-Calédonie (UNC), Institut Agronomique Néo-Calédonien (IAC), Recherches Translationnelles sur le VIH et les maladies infectieuses endémiques et émergentes (TransVIHMI), Institut de Recherche pour le Développement (IRD)-Université de Yaoundé I-Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Méthodes et Algorithmes pour la Bioinformatique (MAB), Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), CNRT 'Nickel & son Environnement'1PS2013-CNRT.IAC/BIOINDIC, Recherches Translationnelles sur le VIH et les maladies infectieuses endémiques er émergentes (TransVIHMI), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD)-Institut de Recherche pour le Développement (IRD)-Université de Yaoundé I-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Université Montpellier 1 (UM1), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)

Subjects
0106 biological sciences, Environmental Engineering, [SDV]Life Sciences [q-bio], Chronosequence, Context (language use), Management, Monitoring, Policy and Law, Biology, 010603 evolutionary biology, 01 natural sciences, Revegetation, 03 medical and health sciences, Récupération des sols, Mesure, Environmental DNA, Ecosystem, Micro-organisme, Restoration ecology, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, Nature and Landscape Conservation, 2. Zero hunger, 0303 health sciences, High-throughput sequencing, Diversité génétique (comme ressource), Ecology, Biodiversity hotspot, P34 - Biologie du sol, Sol volcanique, 15. Life on land, Soil microbial communities, 13. Climate action, Land restoration, P31 - Levés et cartographie des sols, [SDE]Environmental Sciences, P01 - Conservation de la nature et ressources foncières, Biodiversité, eDNA, Amélioration des sols
Abstract

International audience; Due to their central role in ecosystems functioning and their ability to rapidly respond to environmental changes, soil microorganisms could potentially be used for monitoring ecosystems recovery in the context of degraded land restoration. However, these belowground organisms have been, to date, largely neglected. Here, we investigated fungal and bacterial community diversity, composition, and structure from ultramafic soils in New Caledonia, an archipelago in the southwest Pacific recognized as a priority for conservation and restoration. The emerging approach of high-throughput amplicon sequencing of environmental DNA (eDNA)-metabarcoding of eDNAwas used to compare soil microbial communities from four different native vegetation types, representing different stages of a chronosequence and defined as reference ecosystems, to five distinct post-mining sites revegetated several years ago. Our results clearly revealed changes in soil microbial phyla and functional groups along the reference chronosequence and variable responses at the different revegetated sites, with two of the five sites showing a good trajectory of recovery. We thus propose three ratios as metrics for monitoring the restoration trajectory of soil microorganisms: the Ascomycota:Basidiomycota and Saprotrophic:Ectomycorrhizal ratios for fungi, and the Cyanobacteria:Chloroflexi ratios for bacteria. Our study, combined with recent works undertaken in other geographical areas, underpins the great promise that could represent soil microbial eDNA metabarcoding for monitoring restoration progress and success. With the emergence of these new cost-effective and scalable sequencing technologies, soil microbes could, in the near future, be included in guidelines for restoration operations in complement to more conventional approaches.

Published
2021
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