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Auteur Marie-Laure Navas
Documents disponibles écrits par cet auteur (2)
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Multiple cropping systems as drivers for providing multiple ecosystem services: from concepts to design / Sabrina Gaba in Agronomy for sustainable Development, 35 (2015)
Titre : Multiple cropping systems as drivers for providing multiple ecosystem services: from concepts to design Type de document : Imprimé Auteurs : Sabrina Gaba (1978-) ; Françoise Lescourret ; Simon Boudsocq ; Jérôme Enjalbert ; Philippe Hinsinger ; Etienne-Pascal Journet ; Marie-Laure Navas ; Jacques Wery ; Gaetan Louarn ; Eric Malézieux ; Elise Pelzer ; Marion Prudent ; Harry Ozier-Lafontaine Année de publication : 2015 Article en page(s) : 607-623 Langues : Anglais (eng) Catégories : [Thématique] Agroécologie
[Thématique] Culture (cultiver végétaux)
Résumé : Provisioning services, such as the production of food, feed, and fiber, have always been the main focus of agriculture. Since the 1950s, intensive cropping systems based on the cultivation of a single crop or a single cultivar, in simplified rotations or monocultures, and relying on extensive use of agrochemical inputs have been preferred to more diverse, self-sustaining cropping systems, regardless of the environmental consequences. However, there is increasing evidence that such intensive agroecosystems have led to a decline in biodiversity as well as threatening the environment and have damaged a number of ecosystem services such as the biogeochemical nutrient cycles and the regulation of climate and water quality. Consequently, the current challenge facing agriculture is to ensure the future of food production while reducing the use of inputs and limiting environmental impacts and the loss of biodiversity. Here, we review examples of multiple cropping systems that aim to use biotic interactions to reduce chemical inputs and provide more ecosystem services than just provisioning. Our main findings are the identification of underlying ecological processes and management strategies related to the provision of pairs of ecosystem services namely food production and a regulation service. We also found gaps between ecological knowledge and the constraints of agricultural practices in taking account of the interactions and possible trade-offs between multiple ecosystem services as well as socioeconomic constraints. We present guidelines for the design of multiple cropping systems combining ecological, agricultural, and genetic concepts and approaches. Lien pérenne : HAL : hal-01173332 / DOI : 10.1007/s13593-014-0272-z
in Agronomy for sustainable Development > 35 (2015) . - 607-623Gaba, S., Lescourret, F., Boudsocq, S., Enjalbert, J., Hinsinger, P., Journet, E.P., Navas, M.L., Wery, J., Louarn, G., Malézieux, E., Pelzer, E., Prudent, M., Ozier-Lafontaine, H. 2015. Multiple cropping systems as drivers for providing multiple ecosystem services: from concepts to design. Agronomy for sustainable Development, 35: 607-623.
Specific leaf area and dry matter content estimate thickness in laminar leaves / Denis Vile in Annals of Botany, 96 (2005)
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 : [Thématique] 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
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.