Letteratura scientifica selezionata sul tema "Pollinisation – Effets du climat"
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Articoli di riviste sul tema "Pollinisation – Effets du climat"
Babou Frédéric, BAZIE, e DAO Madjelia Cangré Ebou. "Effets des visites des insectes sur la fructification de Moringa oleifera Lam. au Burkina Faso". Journal of Applied Biosciences 181 (31 gennaio 2023): 18974–84. http://dx.doi.org/10.35759/jabs.181.8.
Testo completoSavatier, François. "Rétablissement de l’ozone : des effets sur le climat". Pour la Science N° 512 - juin, n. 6 (2 maggio 2020): 6–7. http://dx.doi.org/10.3917/pls.512.0006.
Testo completoHoyer, Mathilde. "Loi « Climat et résilience »". Revue de la recherche juridique, n. 2 (3 maggio 2022): 913–30. http://dx.doi.org/10.3917/rjj.194.0913.
Testo completoMariage, André, Mélissa Berthelemy e Alexandra Idal-Bernard. "L’incestuel, une corporéisation du lien et sa violence". Le Divan familial Nº 54, n. 1 (28 aprile 2025): 203–16. https://doi.org/10.3917/difa.054.0203.
Testo completoAllemand, Roselyne. "IX. Les effets juridiques du schéma régional climat air énergie". Droit et gestion des collectivités territoriales 33, n. 1 (2013): 169–82. http://dx.doi.org/10.3406/coloc.2013.2403.
Testo completoLe Noc, Yves. "Les effets du climat sur la santé : certitudes et incertitudes". Médecine 20, n. 9 (1 novembre 2024): 388–90. https://doi.org/10.1684/med.2024.1032.
Testo completoTonneau, Jean-Philippe. "Défendre le climat par le droit". L'Homme & la Société N° 218, n. 1 (29 novembre 2023): 163–92. http://dx.doi.org/10.3917/lhs.218.0163.
Testo completoDiallo-Dudek, Julita, Thibaut Vairet, Yves Richard, Thomas Thevenin, Nadège Martiny, Julien Pergaud, Damien Roy et al. "Cartographier la végétation et les Local Climate Zone dans six agglomérations de Bourgogne-Franche-Comté". Climatologie 20 (2023): 2. http://dx.doi.org/10.1051/climat/202320002.
Testo completoFaure, David. "Étude psychosociologique clinique d’une fresque du climat dans une école d’ingénieurs". Nouvelle revue de psychosociologie N° 37, n. 1 (7 maggio 2024): 49–64. http://dx.doi.org/10.3917/nrp.037.0049.
Testo completoBoussafir, Yasmina, Dimitri Mercadier, Lucile Saussaye, Julien Bisson, Sébastien Patouillard, Anthony Matynia, Christian Brulé e Franck Guirado. "Instrumentation de la digue de La Riche : première étape vers un observatoire des interactions sols–climat". Revue Française de Géotechnique, n. 178 (2024): 5. http://dx.doi.org/10.1051/geotech/2024008.
Testo completoTesi sul tema "Pollinisation – Effets du climat"
Keurinck, Léa. "Changement climatique et reproduction des plantes pérennes : le rôle clé de la phénologie florale". Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10323.
Testo completoThe reproduction of many forest tree species is characterised by masting, a highly variable seed production between years at individual level, and synchronised within a population. This fluctuating fruiting dynamics has major cascading effects on the dynamics and regeneration of forest ecosystems. In the case of temperate oaks (Quercus robur and Q. petraea), the annual availability of pollen for reproduction (or pollen limitation) plays a key role in seed production. This is the result both of investment in flowering, at the population scale, and of the meteorological conditions in which pollen maturation and distribution take place. Pollen phenology, i.e. the timing of pollen development and emission, is therefore closely linked to fruiting dynamics, largely controlling the level of pollen limitation. However, the mechanisms governing pollen phenology have not been studied, which makes it impossible to predict the impact of climate change on pollen phenology, and consequently on oak reproductive patterns and oak forest regeneration. The aim of this thesis is to fill this gap by establishing the link between pollen phenology and the masting of temperate oaks. To do this, I sought to identify the determinants of their pollen phenology, to characterise the links with pollen limitation and to investigate the observed and expected influences of climate change. In particular, I cross-referenced a large pollen dataset (gathering data collected by the Réseau National de Surveillance Aérobiologique on a large network deployed in 79 sites across mainland France since 1989 for daily recording of the quantity of airborne pollen) with a meteorological dataset (SAFRAN) using statistical and mechanistic models. My work shows that (i) under current climatic conditions, forcing (heat accumulation in late winter and early spring) explains a large part (79%) of the variability in pollen phenology, which makes it a priority mechanism to consider when proposing realistic projections for the future of temperate oak masting, (ii) meteorological conditions around pollen phenology largely determine the level of pollen limitation, (iii) there is strong spatial heterogeneity in France in the trajectory of pollen limitation in the face of climate change since 1960, (iv) the recent climate trajectory has led to an advance in pollen phenology and a decrease in pollen limitation, the diversity of which between sites remains to be explained. My work demonstrates the necessity of integrating floral phenology into studies examining the future of perennial plant reproduction in the context of climate change
Deguines, Nicolas. "Macro-écologie de la pollinisation en France : conséquences des changements d'occupation du sol sur les communautés d'insectes pollinisateurs et le service de pollinisation". Paris, Muséum national d'histoire naturelle, 2013. http://www.theses.fr/2013MNHN0001.
Testo completoPollinators are essential to both ecosystem functioning and humanity, by pollinating the majority of flowering plants, among which many crops. Among the threats to biodiversity, land-use changes are a major driver of pollinator declines. However, the vast diversity of pollinators is only partially represented in the scientific literature. This thesis aims to study at a large spatial scale the consequences of land-use changes on communities of insect pollinators (Coleoptera, Diptera, Hymenoptera, and Lepidoptera), and the provisioning of pollination services. Part of this work relies on a citizen science programme started in 2010, the Photographic Survey of Flower Visitors. We show that urbanisation is the most detrimental land-use change to pollinator communities, in spite of varying sensitivity among insect orders. Within agricultural land-use, pollinator richness increases with either increased proximity to semi-natural areas or higher landscape heterogeneity. Regarding the composition of pollinator communities, feeding specialists are only maintained in the proximity of semi-natural areas. Finally, we analysed two decades of crop production data from French administrative regions, and show that the efficiency of agricultural intensification decreases with increasing crop’ pollinator dependency. This suggests that agricultural intensification has a large scale detrimental effect on pollination services. This thesis highlights (1) the need to study the composition of pollinator communities, and (2) that pollinator conservation at national level must take agricultural areas into consideration. Moreover, our results suggest that mitigating the negative effects of agricultural intensification on pollinators should benefit to both wild plants and pollination services, opening a way to promote efficient agricultural production while preserving biodiversity
Desaegher, James. "Effets de l’urbanisation sur la morphologie florale et les relations plantes-pollinisateurs". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS408/document.
Testo completoThe expansion of urban areas is known to impact the composition of plant and pollinator communities. However, the effects of urbanization on the interdependency between both communities, and the subsequent evolutionary consequences, are still poorly studied. First, we tried to identify along an urbanization gradient which factors shape plant and pollinator communities. Second, we tested the existence of intra-specific evolutionary divergences of plant reproductive characteristics between populations from urban and rural origins. For these purposes, we combined the analysis of data collected in the Ile-de-France region originating from citizen science projects, and we set up a reciprocal transplantation experiment involving four plant species commonly found in this region. We found that floral morphology was the most frequently implicated factor in the observation of insect families along the gradient. Insect families with positive affinity to impervious areas prefer tubular corollas, while families with negative affinity prefer non-tubular (open) corollas. Urbanization modifies the composition of plant communities, by selecting in particular autogamous and non-entomophilous species. Altogether, our results point towards a functional loss of pollinators along with urbanization. A detailed analysis of the species Cymbalaria muralis suggests a greater reproductive benefit in allocating more resources to flower production in urban plantation sites. As a consequence, plants from urban origin tend to produce more flowers compared to plants from rural origin, at the expense of ovule production per flower and flower coloration. This evolutionary divergence could be explained by shifts in pollinator behaviour induced by higher habitat fragmentation in urban areas. This thesis reveals that shifts in the abundance, in the behaviour or in the functional floral affinities of pollinators, induced by urbanization, could act as selection agents on spontaneous plant species
Vennetier, Michel. "Un nouveau modèle bioclimatique pour la forêt méditerranéenne. Application à l'étude de l'impact du changement climatique sur la végétation et à l'évaluation de la productivité forestière". Aix-Marseille 3, 2007. http://www.theses.fr/2007AIX30077.
Testo completoThis thesis consists of four articles linked by a connecting thread: the interaction between water-balance and climate change in the dynamics of the Mediterranean vegetation. The first part presents the design and the calibration of a new bioclimatic model dedicated to the assessment of the water-balance in Mediterranean forest. In the second part, mis model is used to assess the impact of the climate change on the composition of the forest flora. The third part thoroughly studies Pinus halepensis Mill. Autecology in its whole French distribution area, as this species serves as reference to link the bioclimatic model, climate change and forest height growth and productivity. The fourth part deals with the interaction between water-balance and climate change in the radial growth of Pinus halepensis, by means of an experimental device in field conditions
Carrié, Romain. "Hétérogénéité des paysages et des pratiques agricoles - Effets sur la diversité des abeilles sauvages et la pollinisation". Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0104/document.
Testo completoThe ecological and agricultural importance of wild bees in farmlands stresses the needs for management strategies for these insect pollinators. Wild bees use multiple habitats in agricultural landscapes, such as semi-natural habitats (woodlands, hedgerows, permanent grasslands) and crop fields. This study aims to characterize the community structure of wild bees and assess pollination delivery along gradients of landscape heterogeneity – based on the composition and configuration of semi-natural habitats – and landscape-wide intensity of farming practices. Using a trait-based approach, based on traits determining resource-use by wild bee species, we showed that i) the least mobile species, solitary bees and ground-nesting species were more abundant in crop fields surrounded by large amounts of little-fragmented permanent grasslands, ii) crop fields surrounded by high amount of woodland edges supported a greater abundance of little-mobile bee species, late-emerging bees, social bees and polylectic bees, iii) oligolectic bee species were filtered out in highly forested landscapes, because these species could thrive on resources provided by the crop mosaic. We also found that the positive effect of the proportion of semi-natural habitats on bee diversity was greater in landscapes with intensively managed crop mosaic. Moreover, we showed that the local intensity of farming practices had as much influence on bee diversity as the proportion of semi-natural habitats. Finally, we showed that, depending on situations, the abundance fluctuations of dominant bee species or the occurrence of an assemblage of uncommon bee species can explain variations in pollination success. In the cases where pollination success responded to the occurrence of uncommon species, the proportion of semi-natural habitats had a positive influence on pollination delivery provided by wild bees. This study shows the importance of some uncommon species, dependent on semi-natural habitats, for pollination delivery but also the positive relationship between the abundance of some species groups and the proportion of semi-natural habitats. This work therefore confirms the hypothesis that semi-natural habitats sustain the diversity of wild bee communities and pollination delivery. However, the positive effect of semi-natural habitats on bee diversity depends on farming practices at the local and landscape scale. Therefore, recommendations on the management of landscape heterogeneity and changes in farming practices cannot be given independently from each other
Derraz, Khalid. "Transition du climat méditerranéen au climat aride dans le Moyen Atlas marocain : étude phytoclimatique". Paris 7, 1993. http://www.theses.fr/1993PA070018.
Testo completoWe attemps to detect the flora variation in relation with these the climate in oriental moroccan middle atlas moutains. It cu be seen from the analysis of the horizontal distribution of species along continuons sampling transect across the atlasic massif two flor isties majors boundary : the first in the west on the nw side of ichramouz, the second on the southn peidmont of bon-naceur above the arid moulouyan. It can be obtained from the climatic study two regionals group the fist oriental group principally waterd by disturbs situations from east ti south combined with the east regionals flows. The second occidental groupe rather favoured by disturbs situations from north to west-with nw regionals flows. Finally, it can be obtained from these two analysis three sectors well individualized ; one sector of the lower montains inthe occidental, one sector of the high mountains, and at last one moulouyan sector. The climatic individuality has an effect upon clearly on vegetation stuture, the way of the variation of this one strows the accelerations about level the transition from one sector to the other one and the stowing along the central sector
Khellaf, Mostefa. "Effets du climat sur l'organisme dans les Aurès (Wilaya de Batna)". Paris 4, 1987. http://www.theses.fr/1987PA040240.
Testo completoNevoux, Marie. "Réponse démographique des populations longévives aux changements climatiques : importance de la variabilité spatio-temporelle et de l'hétérogénéité individuelle". Phd thesis, Université de La Rochelle, 2008. http://tel.archives-ouvertes.fr/tel-00245570.
Testo completoBartholomée, Océane. "Quantification de services écosystémiques de régulation à l'échelle locale. Indicateurs, protocoles de terrain et incertitudes - Cas des services de pollinisation et de régulation du climat global". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAV060.
Testo completoEcosystem services are benefits supplied by ecosystem to human societies. In France, recent legislation aims to include ecosystem service in environmental impact studies with the enactment of the Law for the recovery of biodiversity, nature and landscapes (2016). To do so, it is necessary to develop field methods for ecosystem service estimation. In this setting, a collaboration was established between the Laboratoire d’Ecologie Alpine and the environmental consultancy EGIS Environnement to answer the following question: how can ecosystem services be quantified at local scale?We studied two ecosystem services often cited in the global change context. The pollination service is essential for human food production. Given worldwide pollinator declines it is at the centre of scientific, citizen and political concerns. The service of global climate regulation by carbon sequestration by ecosystems is of major interest given the recent and coming climate changes.We investigated four key steps for developing a field protocol. First, the ecosystem service of entomophilous pollination has numerous definitions in the scientific literature. Thus, based on a literature review we built a conceptual framework for defining the pollination service and identifying quantifiable indicators and their measurement methods. We chose to define the pollination service as the ecosystem capacity to support entomophilous pollination, i.e. pollinating insect presence. Second, we worked on indicator selection for the pollination service estimation. Pollination capacity can be estimated through direct indicators linked to pollinator presence on the plot and through indirect indicators linked to feeding and nesting resources in the plot and in the landscape. We compared measures of these two types of indicators within orchards and grasslands. Our aims were to test consistency between both indicator types for the pollination service and the possibility of protocol simplification based on indirect indicators. Indirect indicators did not explain enough of the observed variability in pollinator abundance and richness to allow a protocol simplification.Third, we tried to simplify the estimation protocol of the ecosystem service of global climate regulation from measures of carbon stocks in grasslands and forests. We compared estimations obtained by simplified protocols to estimations obtained by a more complete protocol. We also quantified the uncertainties caused by these simplifications. The estimation protocol could be simplified for the two most important carbon pools: aboveground biomass in forests and soil organic carbon. Finally, to test the applicability of the simplified protocol of carbon stock estimations, we applied it on wetland plots. These plots were organized following in a state-and-transition model to test whether management decisions are likely to affect wetland carbon stocks. Management actions on aboveground biomass changed carbon stocks between herbaceous and forested wetland. Soil organic carbon, the major carbon stock in wetlands, was unchanged between the different studied stats, illustrating the difficulty to manage soil carbon stocks in the short term.This study shows that method development for field quantification of ecosystem service can lead to simple and reliable protocols. However, the development process is different for each ecosystem service
Chabert, Stan. "Pollinisation intégrée des cultures : intégrer les mécanismes liés à la température pour évaluer l'offre et la demande en pollinisation". Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0703/document.
Testo completoInsects contribute to the pollination of 70% of the species cultivated today around the world. With the agriculture intensification in the early twentieth century, farmers began to introduce honey bees colonies into their entomophilous crops to provide pollination service. With the growing recognition of the major role played by wild insects in crop pollination, the concept of integrated crop pollination recently emerged, encouraging the combination of introduced and wild pollinating insects by adapting agricultural practices to ensure sustainable pollination of crops. But the introduction of managed pollinating insects is still an empirical practice that lacks technical references to be implemented with precision. The general objective of this thesis was to provide elements to develop an objective method to define the operational unit load of honey bees to be introduced per unit area of target crop to complement wild pollinating fauna so that pollination is not a limiting factor for production.We worked on a male fertile and a male sterile oilseed rape (Brassica napus L.) lines, hybrid seed productions being entirely dependent on insects for pollination in this species. We were able to determine (i) the minimum number of viable pollen grains to be deposited on stigma so that seed set was complete depending on the temperature, (ii) the duration after anthesis during which the pollen must be deposited on the stigma so that seed set was complete depending on the temperature, (iii) the length of time a flower secretes nectar as a function of temperature for each of the two lines, and (iv) the rate of this nectar secretion as a function of temperature for each of the two lines. We also validated a method for rapid assessment of the size of honey bee stocking rate introduced into entomophilous crops, commonly used in some countries, taking into account temperature.From these elements, we proposed to introduce the concepts of supply and demand in pollination of a target crop, in order to quantify the pollination deficits and the number of pollinating insects to introduce to complete these deficits. These first elements provide a basis for constructing a mechanistic model of integrated pollination management, to predict the number of pollinating insects to be introduced into a crop given its climatic, landscape and varietal context
Libri sul tema "Pollinisation – Effets du climat"
1942-, Boardman John, Favis-Mortlock David 1953-, North Atlantic Treaty Organization. Scientific Affairs Division. e NATO Advanced Research Workshop "Global Change: Modelling Soil Erosion by Water" (1995 : University of Oxford), a cura di. Modelling soil erosion by water. Berlin: Springer-Verlag, 1998.
Cerca il testo completoRené, Neboit-Guilhot, Allée Philippe e Lespez Laurent, a cura di. L' érosion entre société, climat et paléoenvironnement: Table ronde en l'honneur du professeur René Neboit-Guilhot, Clermont-Ferrand, 25-26-27 mars 2004. Clermont-Ferrand: Presses universitaires Blaise-Pascal, 2006.
Cerca il testo completoMartin, Beniston, a cura di. Mountain environments in changing climates. London: Routledge, 1994.
Cerca il testo completoHidore, John J. Global environmental change: Its nature and impact. Upper Saddle River, NJ: Prentice Hall, 1996.
Cerca il testo completoWilliam, Blumen, e Banta Robert M, a cura di. Atmospheric processes over complex terrain. Boston, Mass: American Meteorological Society, 1990.
Cerca il testo completoJones, Hamlyn G. Plants and microclimate: A quantitative approach to environmental plant physiology. 2a ed. Cambridge [England]: Cambridge University Press, 1992.
Cerca il testo completo1972-, Reay Dave, Smith Pete 1965- e Amstel Andre van, a cura di. Methane and climate change. London: Earthscan, 2010.
Cerca il testo completoLimited, MARTEC. Effects of a one metre rise in mean sea-level at Saint John, New Brunswick and the lower reaches of the Saint John River : executive summary of the report =: Effets d'une hausse d'un mètre du niveau moyen de la mer à Saint-Jean (Nouveau-Brunswick) et au passage inférieur du Saint-Jean : résumé administratif du rapport. Ottawa, Ont: Environment Canada, Atmospheric Environment Service = Environnement Canada, Service de l'environnement atmosphérique, 1987.
Cerca il testo completoI, Grover Velma, a cura di. Global warming and climate change: Ten years after Kyoto and still counting. Enfield, N.H: Science Publishers, 2008.
Cerca il testo completoWilliamson, T. B. Climate change and Canada's forests: From impacts to adaptation. Edmonton: Sustainable Forest Management Network, 2009.
Cerca il testo completoCapitoli di libri sul tema "Pollinisation – Effets du climat"
Aoun, Marie-Claire. "S’adapter aux effets du réchauffement climatique". In Climat : une nouvelle chance ?, 78–83. Institut français des relations internationales, 2015. http://dx.doi.org/10.3917/ifri.demon.2015.01.0078.
Testo completo"CHAPITRE 2. Les impacts potentiels des changements climatiques et des événements extrêmes sur la production agricole et effets réciproques". In Démographie, climat et alimentation mondiale, 21–44. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0886-1.c013.
Testo completoHOFFMAN, Michael Timm, e Rick F. ROHDE. "L’utilisation de la photographie répétée en écologie historique africaine". In Écologie historique, 61–74. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9090.ch5.
Testo completoESSEILY, Rana, e Lauriane RAT-FISCHER. "L’humour chez le bébé : développement et enjeux dans les apprentissages". In Processus émotionnels en situation d’apprentissage, 35–62. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9042.ch2.
Testo completoPomel, Simon, e Jean-Noël Salomon. "Chapitre II. Les effets globaux de la déforestation : climat et biodiversité". In La déforestation dans le monde tropical, 23–32. Presses Universitaires de Bordeaux, 1998. http://dx.doi.org/10.4000/books.pub.1400.
Testo completo"4.5 Comment estimer la réponse du système climatique aux gaz à effets de serre ?" In Une introduction à la dynamique des océans et du climat, 433–51. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2390-1-006.
Testo completo"4.5 Comment estimer la réponse du système climatique aux gaz à effets de serre ?" In Une introduction à la dynamique des océans et du climat, 433–51. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2390-1.c006.
Testo completo"4.5 Comment estimer la réponse du système climatique aux gaz à effets de serre ?" In Une introduction à la dynamique des océans et du climat, 433–51. EDP Sciences, 2020. https://doi.org/10.1051/978-2-7598-2389-5.c006.
Testo completo"Lutter contre les polluants atmosphériques pour produire des effets positifs durables sur le climat". In Coopération pour le développement 2012, 99–107. OECD, 2012. http://dx.doi.org/10.1787/dcr-2012-13-fr.
Testo completoLi, Laurent. "L'énergie de demain". In L'énergie de demain, 139–51. EDP Sciences, 2005. https://doi.org/10.3917/edp.bobin.2005.01.0139.
Testo completoAtti di convegni sul tema "Pollinisation – Effets du climat"
Schembri, Patrick. "Transition énergétique et défi climatique : quelle place pour l'hydrogène vert ?" In MOlecules and Materials for the ENergy of TOMorrow. MSH Paris-Saclay Éditions, 2021. http://dx.doi.org/10.52983/ewus7854.
Testo completoRapporti di organizzazioni sul tema "Pollinisation – Effets du climat"
Iyer, Ruhil, e Léa Pare Toe. Effet des aléas climatiques sur les pratiques d’hygiène et d’assainissement en milieu rural au Burkina Faso. The Sanitation Learning Hub, Institute of Development Studies, agosto 2022. http://dx.doi.org/10.19088/slh.2022.017.
Testo completoHong, G., e R. A. Fernandes. Site-specific satellite data record from LEAF-Toolbox to support afforestation assessment in Ontario. Natural Resources Canada/CMSS/Information Management, 2025. https://doi.org/10.4095/p15e0vyyt6.
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