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Auteur Nicolas Legay
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Contribution of above- and below-ground plant traits to the structure and function of grassland soil microbial communities / Nicolas Legay in Annals of Botany, 114 (2014)
Titre : Contribution of above- and below-ground plant traits to the structure and function of grassland soil microbial communities Type de document : Imprimé Auteurs : Nicolas Legay ; Catherine Baxendale ; Karl Grigulis ; Ute krainer ; Eva Kastl ; Michael Schloter ; Richard D. Bardgett ; Cindy Arnoldi ; Michael Bahn ; Maxime Dumont ; Franck Poly ; Jean-Christophe Clément ; Sandra Lavorel (1965-) Année de publication : 2014 Article en page(s) : 1011-1021 Langues : Anglais (eng) Catégories : [Thématique] Prairies humides et hautes communautés herbeuses
Résumé : Background and Aims : Abiotic properties of soil are known to be major drivers of the microbial community within it. Our understanding of how soil microbial properties are related to the functional structure and diversity of plant communities, however, is limited and largely restricted to above-ground plant traits, with the role of below-ground traits being poorly understood. This study investigated the relative contributions of soil abiotic properties and plant traits, both above-ground and below-ground, to variations in microbial processes involved in grassland nitrogen turnover. Methods : In mountain grasslands distributed across three European sites, a correlative approach was used to examine the role of a large range of plant functional traits and soil abiotic factors on microbial variables, including gene abundance of nitrifiers and denitrifiers and their potential activities. Key Results : Direct effects of soil abiotic parameters were found to have the most significant influence on the microbial groups investigated. Indirect pathways via plant functional traits contributed substantially to explaining the relative abundance of fungi and bacteria and gene abundances of the investigated microbial communities, while they explained little of the variance in microbial activities. Gene abundances of nitrifiers and denitrifiers were most strongly related to below-ground plant traits, suggesting that they were the most relevant traits for explaining variation in community structure and abundances of soil microbes involved in nitrification and denitrification. Conclusions : The results suggest that consideration of plant traits, and especially below-ground traits, increases our ability to describe variation in the abundances and the functional characteristics of microbial communities in grassland soils. Identifiant pérenne : DOI : 10.1093/aob/mcu169
in Annals of Botany > 114 (2014) . - 1011-1021Legay, N., Baxendale, C., Grigulis, K., krainer, U., Kastl, E., Schloter, M., Bardgett, R.D., Arnoldi, C., Bahn, M., Dumont, M., Poly, F., Clément, J.C., Lavorel, S., 2014 - Contribution of above- and below-ground plant traits to the structure and function of grassland soil microbial communities ; Annals of Botany, 114 : 1011-1021.
Article (2014)Adobe Acrobat PDF
Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services / Karl Grigulis in Journal of Ecology, 101 (2013)
Titre : Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services Type de document : Imprimé Auteurs : Karl Grigulis ; Sandra Lavorel (1965-) ; Ute krainer ; Nicolas Legay ; Catherine Baxendale ; Maxime Dumont ; Eva Kastl ; Cindy Arnoldi ; Richard D. Bardgett ; Franck Poly ; Thomas Pommier ; Michael Schloter ; Ulrike Tappeiner ; Michael Bahn ; Jean-Christophe Clément Année de publication : 2013 Article en page(s) : 47-57 Langues : Anglais (eng) Catégories : [Thématique] Revégétalisation Note de contenu : 1 Plant functional diversity and soil microbial community composition are tightly coupled. Changes in these interactions may influence ecosystem functioning. Links between plant functional diversity, soil microbial communities and ecosystem functioning have been demonstrated in experiments using plant monocultures and mixtures, using broad plant and microbial functional groups, but have not been examined in diverse natural plant communities. 2 We quantified the relative effects of plant and microbial functional properties on key ecosystem functions. We measured plant functional diversity, soil microbial community composition and parameters associated with nitrogen (N) cycling and key nutrient cycling processes at three grassland sites in different parts of Europe. Because plant structure and function strongly influence soil microbial communities, we determined relationships between ecosystem properties, plant traits and soil community characteristics following a sequential approach in which plant traits were fitted first, followed by the additional effects of soil micro-organisms. 3 We identified a continuum from standing green biomass and standing litter, linked mostly with plant traits, to potential N mineralization and potential leaching of soil inorganic N, linked mostly with microbial properties. Plant and microbial functional parameters were equally important in explaining % organic matter content in soil. A parallel continuum ran from plant height, linked with above-ground biomass, to plant quality effects captured by the leaf economics spectrum, which were linked with the recycling of carbon (C) and N. 4 More exploitative species (higher specific leaf area, leaf N concentrations and lower leaf dry matter content) and taller swards, along with soil microbial communities dominated by bacteria, with rapid microbial activities, were linked with greater fodder production, but poor C and N retention. Conversely, dominance by conservative species (with opposite traits) and soil microbial communities dominated by fungi, and bacteria with slow activities, were usually linked with low production, but greater soil C storage and N retention. 5 Synthesis – Grassland production, C sequestration and soil N retention are jointly related to plant and microbial functional traits. Managing grasslands for selected, or multiple, ecosystem services will thus require a consideration of the joint effects of plant and soil communities. Further understanding of the mechanisms that link plant and microbial functional traits is essential to achieve this. Identifiant pérenne : DOI : 10.1111/1365-2745.12014
in Journal of Ecology > 101 (2013) . - 47-57Grigulis, K., Lavorel, S., krainer, U., Legay, N., Baxendale, C., Dumont, M., Kastl, E., Arnoldi, C., Bardgett, R.D., Poly, F., Pommier, T., Schloter, M., Tappeiner, U., Bahn, M., Clément, J.C., 2013 - Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services ; Journal of Ecology, 101 : 47-57.