Auteurs, date et publication :
Auteurs Floriane Larras , Frédéric Rimet , Vincent Gregorio , Annette Bérard , Christophe Leboulanger , Bernard Montuelle , Agnès Bouchez
Publication : Environmental Science and Pollution Research
Date : 2025
Volume : 23
Issue : 5
Pages : 4301-4311
Catégorie(s)
#INRAE #OLARésumé
Polycyclism, the ability for a plant to produce several flushes in the same growing season, is a key process of plant development. Polycyclism frequency is likely to change with the anticipated climate trend, expected to impact plant growth over the next century. However, polycyclism processes are not well described in the literature, and an important lack of knowledge prevents any possible prediction for the twenty-first century. Aleppo pine is a good model to study polycyclism: it is known to produce up to four annual flushes in one growing season. In this study, we used architectural analysis to describe and reconstruct polycyclism processes, periodicity and frequency on Aleppo pine in a Mediterranean site for the last 15 years. We also assessed relationships between polycyclism frequency and climate. Since 1995, climate was far hotter and drier than normal in South-eastern France: polycyclism was significantly reduced, particularly after 2003 heat-wave, which delayed effect remains till 2008, exacerbated by repeated droughts. Morphologically, polycyclism is primarily influenced by twig vigour, status (principal/secondary and strong axes) and position (low, middle or top crown). Climatically, it depends on summer temperatures of the current and preceding year, rainfall of the first half of preceding year and winter rainfall. Previous year abundant rainfall combined with colder temperatures and high rainfall in spring or at the end of summer of the current year increase tricyclism frequency. Polycyclism is likely to decrease significantly in the twenty-first century due to a hotter and drier climate.
Auteurs, date et publication :
Auteurs François Girard , Michel Vennetier , Samira Ouarmim , Yves Caraglio , Laurent Misson
Publication : Trees
Date : 2011
Volume : 25
Issue : 2
Pages : 311-322
Catégorie(s)
#FORET FontBlanche #INRAERésumé
Watershed losses of phosphorus (P) have been a topic of concern for water resource managers over recent decades. To evaluate environmental policies or before implementing mitigation options at the watershed (catchment area) scale, stakeholders often need to analyze the patterns of point and diffuse sources of phosphorus. This information is often not easy to obtain in field conditions. Several statistical modeling approaches have been developed in recent years to respond to this basic operational demand. Point and diffuse sources are often evaluated from power functions established between phosphorus concentration and water discharge. Such models do not explicitly account for in-stream processes which control P concentrations in the hydrographic network and differentiate the P export dynamics of the various forms and inputs of P. To identify the phosphorus sources and evaluate their change in response to environmental policies, we developed a simple and loaded-oriented model (POPEYE – PhOsPhorus, Evaluation of the efficiencY of Environmental policy measures) that computes retention, settling and re-suspension rates of fine and coarse P fractions and their relation to P concentration of bed sediments. The model is calibrated to a long-term database (25 years), and describes the weekly water and chemical fluxes of a tributary of Lac Léman (Lake Geneva, Venoge river watershed, 240 km2). It adequately predicts observed values of fine and particulate phosphorus and reflects the gradual decrease of point and diffuse inputs over the studied period due to agricultural and sewage treatment policies implemented for the control of lake pollution.
Auteurs, date et publication :
Auteurs Dominique Trevisan , Philippe Quétin , Denis Barbet , Jean Marcel Dorioz
Publication : Journal of Hydrology
Date : 2025
Volume : 450-451
Pages : 254-266
Catégorie(s)
#INRAE #OLAAuteurs, date et publication :
Auteurs J. Côte , J.-M. Roussel , S. Le Cam , G. Bal , G. Evanno
Publication : Journal of Evolutionary Biology
Date : 2012
Volume : 25
Issue : 12
Pages : 2596-2606
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs Orlane Anneville , Gaël Dur , Frédéric Rimet , Sami Souissi
Publication : Hydrobiologia
Date : 2017
Catégorie(s)
#INRAE #OLARésumé
Ce document définit la politique d’accès à l'infrastructure nationale AnaEE France. Il s’appuie notamment sur les chartes d’accès aux services de l’infrastructure et identifie les outils, modalités et règles permettant l’accès aux services de l’infrastructure nationale AnaEE France.
Auteurs, date et publication :
Auteurs Alyssa Clavreul , Marion Bousquet , André Chanzy , Jean-François Le Galliard , Christian Pichot , Florent Massol , Christine Schrive
Date : 2022
Catégorie(s)
#CNRS #Coordination AnaEE #INRAERésumé
Ce document définit la politique des données acquises à partir des services de l'infrastructure nationale AnaEE-France et leur modalité de diffusion. Nous rappelons que ces services couvrent l’accès aux plateformes expérimentales, la production d’analyses pour caractériser les écosystèmes, la mise à disposition d’instruments et l’accès aux plateformes de modélisation. Ce document ne traite pas des données générées par des modèles utilisant les plateformes de modélisation qui font l'objet d'un document spécifique.
Auteurs, date et publication :
Auteurs André Chanzy , Christian Pichot , Jean-François Le Galliard , Marion Bousquet , Christine Schrive
Date : 2021
Catégorie(s)
#CNRS #Coordination AnaEE #INRAEAuteurs, date et publication :
Auteurs Antoine Gardarin , Éric Garnier , Pascal Carrère , Pablo Cruz , Donato Andueza , Anne Bonis , Marie-Pascale Colace , Bertrand Dumont , Michel Duru , Anne Farruggia , Stéphanie Gaucherand , Karl Grigulis , Éric Kernéïs , Sandra Lavorel , Frédérique Louault , Grégory Loucougaray , François Mesléard , Nicole Yavercovski , Elena Kazakou , Jennifer Firn
Publication : Journal of Applied Ecology
Date : 2025
Volume : 51
Issue : 5
Pages : 1207-1217
Catégorie(s)
#ACBB #ACBB Theix #CNRS #INRAERésumé
The lack of data on the combined effects of livestock species and grazing intensity makes it difficult to propose recommendations for the management of biodiversity and production in grassland ecosystems. We therefore divided a fertile grassland into 12 plots that were grazed by either cattle at a high or a low stocking density or by sheep at the same low stocking density. Grazing management had an immediate and direct impact on sward structure. We infer that dominant forbs (Taraxacum officinale) and legumes (Trifolium repens) were strongly disadvantaged by biomass accumulation in lightly grazed plots. Consequently, stocking density affected plant community composition right from the start of the second year of the survey. There was direct and indirect evidence that the selection made by sheep on forbs and legumes could be stronger than the selection made by cattle. The impact of this difference in selectivity took six years to manifest, when legume abundance became lowest and grass abundance peaked in sheep-grazed pastures. Conversely, neither species richness nor evenness of the plant community was modified over the first six years of the survey; it should therefore be continued in order to determine the equilibrium states that can be reached under the three management strategies.
Auteurs, date et publication :
Auteurs Bertrand Dumont , Pascal Carrère , Cécile Ginane , Anne Farruggia , Laurent Lanore , Antoine Tardif , Francis Decuq , Olivier Darsonville , Frédérique Louault
Publication : Basic and Applied Ecology
Date : 2025
Volume : 12
Pages : 187-194
Catégorie(s)
#ACBB #ACBB Theix #INRAERésumé
Le Plan de Gestion de Données(PGD) définit l’organisation et les moyens mobilisés pour la mise en œuvre de la politique de gestion et valorisation des données de l’infrastructure AnaEE France. Il porte sur l’organisation générale des systèmes d’information et des données et vient compléter et fédérer les PGD des plateformes constitutives d’AnaEE France en tant qu’infrastructure distribuée. Le PGD AnaEE France est construit sur le ‘modèle PGD de ANR’ et est structuré en ‘sous-PGD’ correspondants à des modalités d’organisation et de gestion spécifiques imposées par les différences de nature de données. Le PGD AnaEE France est ainsi constitué de deux volets, l’un consacré aux jeux de données, l’autre aux logiciels. Le présent document ne porte que sur les données.
Auteurs, date et publication :
Auteurs Christian Pichot , André Chanzy , Jean-François Le Galliard
Date : 2022