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Auteur Sandra Lavorel (1965-) |
Documents disponibles écrits par cet auteur (17)
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Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services / Karl Grigulis in Journal of ecology, 101 (2013)
[article]
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 : [CBNPMP-Thèmes] 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. Lien pérenne : DOI : 10.1111/1365-2745.12014 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148731
in Journal of ecology > 101 (2013) . - 47-57Grigulis, K., Lavorel, S., krainer, U., Legay, N., Baxendale, C., Dumont, M., Kastl, E., Arnoldi, C., Bardgett, RD., 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.Documents numériques
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Article (2013)URL Specific leaf area and dry matter content estimate thickness in laminar leaves / Denis Vile in Annals of Botany, 96 (2005)
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Titre : Specific leaf area and dry matter content estimate thickness in laminar leaves Type de document : Imprimé Auteurs : Denis Vile (1977-) ; Eric Garnier (1959-) ; Bill Shipley (1960-) ; Gérard Laurent ; Marie-Laure Navas ; Catherine Roumet ; Sandra Lavorel (1965-) ; Sandra Díaz ; John Gavin Hodgson (1945-) ; Francisco Lloret ; Guy F. Midgley ; Hendrik Poorter ; Mike C. Rutherford ; Peter J. Wilson ; Ian J. Wright Année de publication : 2005 Article en page(s) : 1129-1136 Langues : Français (fre) Catégories : [CBNPMP-Thèmes] Revégétalisation Résumé : Background and Aims Leaf thickness plays an important role in leaf and plant functioning, and relates to a species' strategy of resource acquisition and use. As such, it has been widely used for screening purposes in crop science and community ecology. However, since its measurement is not straightforward, a number of estimates have been proposed. Here, the validity of the (SLA × LDMC)−1 product is tested to estimate leaf thickness, where SLA is the specific leaf area (leaf area/dry mass) and LDMC is the leaf dry matter content (leaf dry mass/fresh mass). SLA and LDMC are two leaf traits that are both more easily measurable and often reported in the literature. Methods The relationship between leaf thickness (LT) and (SLA × LDMC)−1 was tested in two analyses of covariance using 11 datasets (three original and eight published) for a total number of 1039 data points, corresponding to a wide range of growth forms growing in contrasted environments in four continents. Key Results and Conclusions The overall slope and intercept of the relationship were not significantly different from one and zero, respectively, and the residual standard error was 0·11. Only two of the eight datasets displayed a significant difference in the intercepts, and the only significant difference among the most represented growth forms was for trees. LT can therefore be estimated by (SLA × LDMC)−1, allowing leaf thickness to be derived from easily and widely measured leaf traits. Lien pérenne : DOI : 10.1093/aob/mci264 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150726
in Annals of Botany > 96 (2005) . - 1129-1136Vile, D., Garnier, E., Shipley, B., Laurent, G., Navas, M.L., Roumet, C., Lavorel, S., Díaz, S., Hodgson, J.G., Lloret, F., Midgley, GF., Poorter, H., Rutherford, MC., Wilson, PJ., Wright, IJ. 2005. Specific leaf area and dry matter content estimate thickness in laminar leaves. Annals of Botany, 96: 1129-1136.Documents numériques
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Article (2005)URL