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Auteur Karl Grigulis |
Documents disponibles écrits par cet auteur (4)
Affiner la rechercheContribution 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 : [CBNPMP-Thématique] Prairies humides et hautes communautés herbeuses
[CBNPMP-Thématique] RevégétalisationRésumé : 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. Lien pérenne : DOI : 10.1093/aob/mcu169 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148965
in Annals of Botany > 114 (2014) . - 1011-1021Legay, Nicolas, Baxendale, Catherine, Grigulis, Karl, krainer, Ute, Kastl, Eva, Schloter, Michael, Bardgett, Richard D., Arnoldi, Cindy, Bahn, Michael, Dumont, Maxime, Poly, Franck, Clément, Jean-Christophe, Lavorel, Sandra (1965-) 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.Documents numériques
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Titre : Incorporating plant functional diversity effects in ecosystem service assessments Type de document : Imprimé Auteurs : Sandra Díaz ; Sandra Lavorel (1965-) ; Francesco Bello (de) ; Fabien Quétier ; Karl Grigulis ; T. Matthew Robson Année de publication : 2007 Article en page(s) : 20684-20689 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation Résumé : Global environmental change affects the sustained provision of a wide set of ecosystem services. Although the delivery of ecosystem services is strongly affected by abiotic drivers and direct land use effects, it is also modulated by the functional diversity of biological communities (the value, range, and relative abundance of functional traits in a given ecosystem). The focus of this article is on integrating the different possible mechanisms by which functional diversity affects ecosystem properties that are directly relevant to ecosystem services. We propose a systematic way for progressing in understanding how land cover change affects these ecosystem properties through functional diversity modifications. Models on links between ecosystem properties and the local mean, range, and distribution of plant trait values are numerous, but they have been scattered in the literature, with varying degrees of empirical support and varying functional diversity components analyzed. Here we articulate these different components in a single conceptual and methodological framework that allows testing them in combination. We illustrate our approach with examples from the literature and apply the proposed framework to a grassland system in the central French Alps in which functional diversity, by responding to land use change, alters the provision of ecosystem services important to local stakeholders. We claim that our framework contributes to opening a new area of research at the interface of land change science and fundamental ecology. Lien pérenne : DOI : 10.1073/pnas.0704716104 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148729
in Proceedings of the National Academy of Sciences of the United States of America > 104 (52) (2007) . - 20684-20689Díaz, Sandra, Lavorel, Sandra (1965-), Bello (de), Francesco, Quétier, Fabien, Grigulis, Karl, Robson, T. Matthew 2007 Incorporating plant functional diversity effects in ecosystem service assessments. Proceedings of the National Academy of Sciences of the United States of America, 104(52): 20684-20689.Documents numériques
Article (2007)URL
Titre : Mechanisms underlying the impacts of exotic plant invasions Type de document : Électronique Auteurs : Jonathan M. Levine ; Montserrat Vilà ; Carla Marie D'Antonio (1956-) ; Jeffrey S. Dukes ; Karl Grigulis ; Sandra Lavorel (1965-) Année de publication : 2003 Article en page(s) : 775–781 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Résumé : Although the impacts of exotic plant invasions on community structure and ecosystem processes are well appreciated, the pathways or mechanisms that underlie these impacts are poorly understood. Better exploration of these processes is essential to understanding why exotic plants impact only certain systems, and why only some invaders have large impacts. Here, we review over 150 studies to evaluate the mechanisms underlying the impacts of exotic plant invasions on plant and animal community structure, nutrient cycling, hydrology and fire regimes. We find that, while numerous studies have examined the impacts of invasions on plant diversity and composition, less than 5% test whether these effects arise through competition, allelopathy, alteration of ecosystem variables or other processes. Nonetheless, competition was often hypothesized, and nearly all studies competing native and alien plants against each other found strong competitive effects of exotic species. In contrast to studies of the impacts on plant community structure and higher trophic levels, research examining impacts on nitrogen cycling, hydrology and fire regimes is generally highly mechanistic, often motivated by specific invader traits. We encourage future studies that link impacts on community structure to ecosystem processes, and relate the controls over invasibility to the controls over impact. Lien pérenne : DOI : 10.1098/rspb.2003.2327 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141872
in Proceedings of the Royal Society. Biological Sciences > 270 (2003) . - 775–781Levine, Jonathan M., Vilà, Montserrat, D'Antonio, Carla Marie (1956-), Dukes, Jeffrey S., Grigulis, Karl, Lavorel, Sandra (1965-) 2003 Mechanisms underlying the impacts of exotic plant invasions. Proceedings of the Royal Society. Biological Sciences, 270: 775–781.
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-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. 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, Karl, Lavorel, Sandra (1965-), krainer, Ute, Legay, Nicolas, Baxendale, Catherine, Dumont, Maxime, Kastl, Eva, Arnoldi, Cindy, Bardgett, Richard D., Poly, Franck, Pommier, Thomas, Schloter, Michael, Tappeiner, Ulrike, Bahn, Michael, Clément, Jean-Christophe 2013 Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services. Journal of ecology, 101: 47-57.Documents numériques
Article (2013)URL
