Literatura académica sobre el tema "Étagement de la végétation en montagne"
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Artículos de revistas sobre el tema "Étagement de la végétation en montagne"
Brugiapaglia, Elisabetta, Jacques-Louis de Beaulieu, Joël Guiot y Maurice Reille. "Transect de pluie pollinique et étagement de la végétation dans le massif du Taillefer (Isère, France)". Géographie physique et Quaternaire 52, n.º 2 (2 de octubre de 2002): 209–18. http://dx.doi.org/10.7202/004775ar.
Texto completoBégin, Yves y Serge Payette. "La végétation riveraine du lac à l’Eau Claire, Québec subarctique". Géographie physique et Quaternaire 43, n.º 1 (18 de diciembre de 2007): 39–50. http://dx.doi.org/10.7202/032752ar.
Texto completoAlexandre, Frédéric. "L'étagement de la végétation en montagne: un modèle à revisiter". L'information géographique 67, n.º 1 (2003): 45–59. http://dx.doi.org/10.3406/ingeo.2003.2875.
Texto completoCosta, Miguel Reimão y Desidério Batista. "Architecture traditionnelle dans les zones de montagne: contribution à l’étude de la typologie des habitations dans le Haut Atlas au Maroc". digitAR - Revista Digital de Arqueologia, Arquitectura e Artes, n.º 5 (20 de febrero de 2019): 373–97. http://dx.doi.org/10.14195/2182-844x_5_21.
Texto completoHUC, Stéphanie, Gilles FRIBOULET y David PAULIN. "Valorisation agro-écologique de sédiments lacustres en contexte de revégétalisation de pelouse subalpine (Barrage du Mont Cenis, Alpes, France)". Sciences Eaux & Territoires, n.º 39 (10 de junio de 2022): 1–6. http://dx.doi.org/10.20870/revue-set.2022.39.7059.
Texto completoCantegrel, Renaud. "Au long de la taïga et de la toundra : incursion nordique en Laponie". Revue forestière française 73, n.º 4 (14 de junio de 2022): 429–65. http://dx.doi.org/10.20870/revforfr.2021.5563.
Texto completoKornaś, J. "Succession régressive de la végétation de garrigue sur calcaires compacts dans la Montagne de la Gardiole près de Montpellier [Regresywny rozwój roślinności garrigue na wapieniach skalistych pasma Montagne de la Gardiole koło Montpellier]". Acta Societatis Botanicorum Poloniae 27, n.º 4 (2017): 563–96. http://dx.doi.org/10.5586/asbp.1958.030.
Texto completoCarcaillet, Christopher y Brigitte Talon. "Aspects taphonomiques de la stratigraphie et de la datation de charbons de bois dans les sols : exemple de quelques sols des Alpes". Géographie physique et Quaternaire 50, n.º 2 (30 de noviembre de 2007): 233–44. http://dx.doi.org/10.7202/033091ar.
Texto completoWeaver, Peter L. "Changements à long terme de structure et de composition d'une forêt primaire humide de basse montagne suite au passage d'ouragans a Puerto Rico". BOIS & FORETS DES TROPIQUES 317, n.º 317 (1 de septiembre de 2013): 7. http://dx.doi.org/10.19182/bft2013.317.a20525.
Texto completoBardat, J. "Aperçu de la flore et de la végétation bryophytiques du site des Narces d'Issanlas (Ardèche-France), témoin exceptionnel d'une zone humide de moyenne montagne". Cryptogamie Bryologie 23, n.º 1 (marzo de 2002): 51–72. http://dx.doi.org/10.1016/s1290-0796(02)85009-x.
Texto completoTesis sobre el tema "Étagement de la végétation en montagne"
Birre, Deborah. "Dynamique spatio-temporelle de la limite supérieure de la forêt dans la partie orientale des Pyrénées françaises : le rôle de l’anthropisation et des changements climatiques". Electronic Thesis or Diss., Paris 13, 2024. https://theses.hal.science/tel-04651374.
Texto completoThe position of the upper forest limit, which delineates the transition between forested areas and alpine grasslands in mountainous regions, is theoretically determined by temperatures. However, its response to current climate warming is intricate and heterogeneous, carrying significant ecological and socio-economic implications. This thesis focuses on the Eastern Pyrenees to unravel the interactions between various potential factors and the dynamics of the upper forest limit. The central hypothesis suggests that the hierarchy of influencing factors, whether climatic or anthropogenic, varies depending on the scale of analysis. To test this hypothesis, a methodology combining geomatics for diachronic mapping at the scale of the entire study area, regional statistical analyses of potential factors, and local field surveys has been employed. Four major results have emerged from these analyses : (i) the lowering of the forest limit altitude compared to its theoretical altitude; (ii) the complementary nature of dynamic indicators beyond mere altitude changes; (iii) the multidimensionality of the dynamic depending on the indicator and scale considered; and (iv) the multiscale nature of the dynamic, where local contexts variably influence outcomes. These findings confirm the central hypothesis of the thesis and shed light on the relative effects of climate at regional and local scales
Mazier, Florence. "Modelisation de la relation entre pluie pollinique actuelle, végétation et pratiques pastorales en moyenne montagne (pyrénées et jura) : application pour l'interprétation des données polliniques fossiles". Besançon, 2006. http://www.theses.fr/2006BESA2022.
Texto completoThe reliability of pollen analysis as a tool for the reconstruction of past vegetation and landscape depends on our knowledge of modern ecosystems. These reconstructions involve precise understanding of modern plant communities and how they are reflected in pollen assemblages. The calibration between present pollen deposition and vegetation has been studied with two approaches in pastoral areas of middle range mountains. In Pays Basque, the comparative approach differentiated well dispersed pollen taxa and a pool of pollen which indicates local grazing activities. These results were used to reconstruct local pastoral activity from fossil pollen records for the last 2000 years. Multiscale interpretation of pollen assemblages, use of multiproxy (pollen and non pollen palynomorphs) and complementary information from other fields (pastoral archaeology, history) give a better understanding of spatial dimensions and intensity of pastoral activities. In the Jura Mountains, Extended R-value model was used to estimate the relevant source area of pollen assemblages deposited in moss polsters (Radius of 300 m). Pollen productivity estimates were calculated for several taxa characteristics of woodland pasture landscape. This set of data is the first step for quantitative reconstruction of past landscape. These approaches aim to assess the structure and the composition of past landscape and to evaluate pastoral impact on past ecosystems. They will provide useful information for predictive models in various disciplines (climate modeling, nature conservancy…)
Viguier, Clément. "Dynamiques des prairies de montagne : intégration de la plasticité phénotypique dans un nouveau modèle à base d'agents". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAV057/document.
Texto completoMountain grasslands provide numerous ecosystem services that are likely to be impacted by global change. Plant functional traits hold great promise to succinctly characterise plant community response to changing environmental conditions and its effect on associated services; with growing evidence of the importance of intra-specific trait variability. I propose here a novel agent-based model, MountGrass, that combines the modelling of species rich grassland communities with phenotypic plasticity. These two key components are integrated via allocation trade-offs based on established empirical patterns of strategic differentiation in resource-use.With MountGrass, I explored the impact of phenotypic plasticity on individual plant growth and on main properties of grassland communities. At the individual level, the parametrised model revealed a strong impact of plasticity on growth and species’ fundamental niches, with potentially large impacts on community properties. These effects are explained by the convergence of species’ strategies and the reduction of the sensitivity to variable conditions. At the community level, simulations confirmed the strong effect of plastic allocation on community structure and species richness. These effects are driven by the cumulative effect of a reduction of both abiotic filtering and fitness differences between species. However, no clear effect on the dominant strategy or productivity could be detected.Going further, the robustness of these findings and other patterns of community dynamics should be analysed with alternative or extended implementations of MountGrass. In sum, this work opens a door towards a better integration and understanding of the role of the intra-specific variability in complex plant community dynamics
Redjadj, Claire. "Etude inter-et intra-spécifique des variations spatio-temporelles de l'utilisation des ressources alimentaires au sein d'une communauté de grands herbivores de montagne". Grenoble, 2010. http://www.theses.fr/2010GRENV080.
Texto completoSince last 30 years, populations oflarge herbivores (such as chamois Rupicapra Rupicapra, mouflon Ovis gmelini, ibex Capra ibex, red deer Cervus elaphus, roe deer Capreolus capreolus) have dramatically increased in number and geographical range. This raises the risk of competition particularly crucial, especially in the context where overlaps between alpine species are increasingly important, including domestic species. This context calls for a better understanding and prediction of the spatial and temporal dynamics of the herbivore populations/communities in relation to the dynamics of their resources. Lt is indeed not clear yet how and when the exponential increase of ungulates will stop¡ and which relative roles hunters, natural predation, and resource limitation will play in the future. To answer such questions, it is important to understand how different species share resources, identify resources that could be limiting fo each species, and assess the role of species interactions that can result in competition phenomena. Ln this study it was show the patterns of diet variation of 4 large herbivores species (roe deer, chamois, mouflon, red deer) during food restriction and annual patterns of variation in diet quality of chamois according to sex and differential use of alpine and forest habitat
Mazier, Florence. "MODELISATION DE LA RELATION ENTRE PLUIE POLLINIQUE ACTUELLE, VEGETATION ET PRATIQUES PASTORALES EN MOYENNE MONTAGNE (PYRENEES ET JURA)Application pour l'interprétation des données polliniques fossiles". Phd thesis, Université de Franche-Comté, 2006. http://tel.archives-ouvertes.fr/tel-00123869.
Texto completoLa calibration de la relation pluie pollinique actuelle / végétation a été étudiée selon deux approches dans des régions pastorales de moyenne montagne. Au Pays Basque, l'approche comparative a conduit à la discrimination des taxons transportés sur de longues distances et d'un ensemble d'indicateurs polliniques directement liés au pastoralisme. Dès lors, l'application de ces résultats aux données polliniques fossiles a permis de reconstruire à l'échelle locale les activités pastorales pour les 2000 dernières années. La lecture multi scalaire des données polliniques, l'utilisation combinée de plusieurs proxy (grain de pollen et microfossiles non polliniques) et la confrontation avec d'autres disciplines (archéologie pastorale, histoire) fournissent une meilleure lecture du fonctionnement des systèmes pastoraux, de leur dynamique et de leur signification. Parallèlement, le modèle Extended R-value a permis d'identifier la végétation à l'origine des grains de pollen conservés dans les mousses du paysage jurassien (rayon de 300m). Ainsi, les productions polliniques ont été estimées pour les taxons caractéristiques de ce paysage et constituent l'étape préliminaire pour simuler et reconstituer quantitativement les paysages anciens.
Ces approches apportent désormais une lecture plus concrète de la structure et de la composition des paysages passés et de l'impact des pratiques pastorales sur l'environnement passé. Elles constituent des outils potentiels pour des modèles prédictifs (climat, écologie...)
Petetin, Anne. "Relations climat-sol-végétation dans le Trièves-Beaumont, zone de transition des Alpes occidentales ; application : typologie forestière et productivité du sapin". Grenoble 1, 1993. http://www.theses.fr/1993GRE10086.
Texto completoBrisset, Elodie. "Sensibilité des milieux de montagne aux forçages climatiques et anthropiques depuis 14 000 ans dans les Alpes du Sud : Approche multidisciplinaire (sédimentologie, géochimie, palynologie) et multi-sites (lac Petit, lac de Vens et lac d’Allos)". Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM3017.
Texto completoWithin the context of increasing demographic pressures and hazards related to climate change, the problems posed by landscape erosion have become particularly crucial. The current management of Mediterranean mountain environments, which are highly exposed to erosion hazards, needs to be supported by a thorough understanding of their susceptibility to these hazards and their long-term trajectories.A retrospective analysis of environmental trajectories has been conducted from the study of three lacustrine sedimentary archives in the Southern Alps (Lakes Petit, Vens and Allos). This multi-disciplinary study, based on sedimentology, geochemistry and palynology, has enabled characterization of the dynamics of erosion and changes in plant cover over the last 14,000 years.In Lakes Allos and Vens, the start of the Holocene is marked by the maturing of ecosystems, by chemical weathering of soils and by forest encroachment at higher altitudes. These environmental changes resulted in progressive ecosystem stabilization, followed by a bio-pedological optimum, and subsequently by more open landscapes, and then soil destabilization. These four successive phases have ben dated, respectively, at 12,000-8000 cal. BP, 8000-6000 cal. BP, 6000-1900 cal. BP, and 1900 cal. BP to Present. The last of these phases occurred earlier, at 4200 cal. BP, in Lake Petit.The triggering of soil erosion has systematically been hinged on periods of heavy precipitation affecting landscapes rendered vulnerable, by human societies, to the effects of such perturbations
Dasnias, Philippe. "Successions végétales : synthèse bibliographique et dynamisme à l'ubac montagnard de la Moyenne Tarentaise (Savoie)". Grenoble 1, 1987. http://www.theses.fr/1987GRE10047.
Texto completoBodin, Jeanne. "Observed changes in mountain vegetation of the Alps during the XXth century - Role of climate and land-use changes". Phd thesis, Université Henri Poincaré - Nancy I, 2010. http://tel.archives-ouvertes.fr/tel-00592144.
Texto completoLibros sobre el tema "Étagement de la végétation en montagne"
naturelle, Muséum national d'Histoire. Haute Montagne des Pyrénées Orientales : Dynamique de la Végétation de la Haute Montagne des Pyrénées Orientales et Impact des Sociétés du Néolithique Final Au Bronze Moyen: Analyse Palynologique Multi-Sites et Multi-indicateurs. Independently Published, 2022.
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