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Статті в журналах з теми "Chênes – Effets des changements climatiques"
Kremer, Antoine. "Évolution biologique des arbres et évolution climatique." Futuribles N° 461, no. 4 (June 12, 2024): 23–40. http://dx.doi.org/10.3917/futur.461.0023.
Повний текст джерелаBuka, Irena, and Katherine M. Shea. "Les changements climatiques mondiaux et la santé des enfants canadiens." Paediatrics & Child Health 24, no. 8 (December 2019): 558. http://dx.doi.org/10.1093/pch/pxz158.
Повний текст джерелаKipp, Amy, Ashlee Cunsolo, Kelly Vodden, Nia King, Sean Manners, and Sherilee L. Harper. "Aperçu - Les effets des changements climatiques sur la santé et le bien-être dans les régions rurales et éloignées au Canada : synthèse documentaire." Promotion de la santé et prévention des maladies chroniques au Canada 39, no. 4 (April 2019): 134–39. http://dx.doi.org/10.24095/hpcdp.39.4.02f.
Повний текст джерелаJohnson, Maxime. "Le paradoxe environnemental du numérique." Gestion Vol. 49, no. 1 (March 19, 2024): 70–72. http://dx.doi.org/10.3917/riges.491.0070.
Повний текст джерелаGendreau, Yanick, Audrey Lachance, Marylène Ricard, Hélène Gilbert, Nicolas Casajus, and Dominique Berteaux. "Changements climatiques : défis et perspectives pour les plantes vasculaires en situation précaire au Québec." Botanique 142, no. 1 (November 22, 2017): 16–35. http://dx.doi.org/10.7202/1042011ar.
Повний текст джерелаSODJINOU, Epiphane, and Saïd K. HOUNKPONOU. "Impact des changements climatiques sur les revenus des ménages agricoles au Bénin : Evidence basée sur l’application du modèle Ricardien." Annales de l’Université de Parakou - Série Sciences Naturelles et Agronomie 9, no. 1 (June 30, 2019): 43–54. http://dx.doi.org/10.56109/aup-sna.v9i1.62.
Повний текст джерелаMacIntyre, Elaina, Sanjay Khanna, Anthea Darychuk, Ray Copes, and Brian Schwartz. "Synthèse des données probantes - Évaluation de la communication des risques en présence de changements climatiques et de phénomènes météorologiques extrêmes : examen de la portée." Promotion de la santé et prévention des maladies chroniques au Canada 39, no. 4 (April 2019): 155–71. http://dx.doi.org/10.24095/hpcdp.39.4.06f.
Повний текст джерелаChabi, Biaou Ibidun Hervé, Akibou A. Akindele, Hervé Yabi, and Euloge Ogouwale. "Trajectoires de l'agriculture familiale face aux changements climatiques dans la zone agro-écologique 3 du Bénin." Proceedings of the International Association of Hydrological Sciences 384 (November 16, 2021): 325–30. http://dx.doi.org/10.5194/piahs-384-325-2021.
Повний текст джерелаMalena-Chan, Rachel. "Recherche qualitative originale - Modélisation narrative pour étudier l’engagement à l’égard de la lutte contre les changements climatiques chez de jeunes dirigeants communautaires." Promotion de la santé et prévention des maladies chroniques au Canada 39, no. 4 (April 2019): 172–82. http://dx.doi.org/10.24095/hpcdp.39.4.07f.
Повний текст джерелаKingsley, Marianne. "Commentaire - Changements climatiques, santé et avantages connexes des espaces verts." Promotion de la santé et prévention des maladies chroniques au Canada 39, no. 4 (April 2019): 144–48. http://dx.doi.org/10.24095/hpcdp.39.4.04f.
Повний текст джерелаДисертації з теми "Chênes – Effets des changements climatiques"
Eichenlaub, Lisa. "Anticiper, comprendre et analyser les pathologies complexes et émergentes des chênes." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0148.
Повний текст джерелаEuropean oaks (Quercus robur, pedunculate oak and Q. petraea, sessile oak) are two emblematic forest species with important ecological, economical and cultural roles. These species are essential in many ecosystems and represent respectively 11 and 12% of the volume of standing wood of deciduous trees in France. However, they are subject to biotic and abiotic disturbances, which have increased in frequency and intensity due to global changes. Declines, which are multifactorial syndromes, and diseases caused by exotic or native pathogens, have strongly affected oaks since the beginning of the 20th century. The nature of these declines, as well as the interactions between biotic and abiotic factors causing them, are not fully understood. This thesis proposes to define part of their etiology through a study of the cortical and root pathobiomes. Finally, it stresses the importance of territorial surveillance as a way to prevent the introduction of exotic pathogens, especially the threat represented by quarantine organisms. Acute Oak Decline (AOD) is currently affecting oak populations in the United-Kingdom. Mediated by abiotic factors (temperature and precipitation), AOD would be triggered by insects (mainly Agrilus biguttatus) and a complex of bacterial species. This disease perfectly illustrates the pathobiome paradigm, as the complex host-pathobiome-insect interactions are essential to its development. In order to clarify the prevalence of symptoms associated with AOD in France and the role played by bacteria in the observed declines, a study of the etiology of cortical necroses associated or not with attacks of A. biguttatus on declining oaks has been observed. The first report on the presence of bacteria Brenneria goodwinii, Gibbsiella quercinecans and Rahnella victoriana in necroses has been made on Q. robur and Q. petraea in France. However, these bacteria have been isolated less frequently in the lesions than the fungi Fusarium quercinum, F. falsibabinda, Neonectria sp., N. punicea. Moreover, their pathogenicity was confirmed by the inoculations of young oak plants. This confirms the importance of the pathobiome in the symptoms associated with AOD and suggests a significant role of fungal pathogens, which was previously underestimated. The relationships between soil microbiota and chronic oak decline were analyzed in the Chantilly Forest (Oise, France) and with a comparison approach by pair of declining and non-declining oaks, an analysis of the fungal and oomycetes diversities by metabarcoding was performed. The study revealed that the compositions mainly depend on the types of soil and the health status of the trees according to the compartment sampled (bulk soil, rhizosphere or roots). 4 Finally, to help the diagnosis and the identification of phytosanitary problems on Quercus spp. in France, an interactive tool called NESTOR (phytosaNitary survEillance and diagnoSTics of Oaks in FRance), has been developed. Inventorying the main bioaggressors and abiotic problems on oaks with this tool is intended to encourage passive surveillance of the territory by the general public and professionals and also to support the active surveillance of the territory led by the Forest Health Department of the French Ministry of Agriculture and Food in France. In 2022-2023, intensified surveillance of oak wilt disease, caused by the vascular fungus Bretziella fagacearum, was carried out by collecting samples from symptomatic trees. The isolations and diagnoses conducted during this thesis confirmed that the fungus is still absent from the territory, but that it remains important to stay vigilant about its possible introduction in France
O'Heix, Bruno-Charles. "Etude écologique du changement climatique et des effets de l'ozone sur les chênes ainsi que sur l'écosystème d'une forêt dépérissante en Europe Centrale : vers une intégration dans les prises de décisions politiques pour un aménagement forestier durable." Nancy 1, 1999. http://www.theses.fr/1999NAN10290.
Повний текст джерелаThe condition of Hungarian forest ecosystems was analysed and compared to the European and world ecosystems, taking into account the global climatic changes. The Hungarian site of Síkfökút, continuously studied during the last twenty-five years has been considered in the light of new concepts. Two oak species Quercus petraea and Quercus cerris are growing in this stand, showing contrasting declining symptoms, Q. Cerris being considered as more resistant. Different analyses were made on the site, including dendrochronology and litter decomposition. In parallel, a fumigation experiment with ozone was carried out in a phytotronic chamber including two more oak species Q. Robur and Q. Rubra. The four oak species showed differential responses to ozone and they can be ranged from the more ozone tolerant to the more sensitive as follows: Q. Cerris > Q. Rubra > Q. Petraea > Q. Robur. These results led to suggestions for recommendations of species selection in reforestation and afforestation
Dietz, Lucie. "Dynamique spontanée post-tempête de la végétation forestière en contexte de changement climatique." Electronic Thesis or Diss., Paris, AgroParisTech, 2020. http://www.theses.fr/2020AGPT0004.
Повний текст джерелаIn a context where the disturbances could be more severe and/or more frequent, the choice of silvicultural management to be implemented following disturbances comes up against the lack of knowledge of the spontaneous dynamics of regeneration obtained in the context of climate change. From permanent plots installed in France following the storms of 1999, the objective of this study is to analyse the medium-term vegetation dynamics observed within forest gaps, to identify its main determinants and assess the interaction between disturbances and adaptation of plant communities to climate change. The natural tree regeneration, obtained in the post-storm gaps, seems to be sufficient in terms of density and species diversity. Most sites have in average more than 2000 stems/ha and 4.4 species present in the stratum greater than 2 m. The few concerning situations have been identified from the young stages of regeneration and have common characteristics: they are old coniferous stands on acidic soil where competing vegetation has been able to develop, inducing regeneration blocking. In these contexts, a silvicultural intervention would have been desirable to promote regeneration. A specific study of the natural regeneration of three major European hardwood species was carried out: oak, hornbeam and beech. We have highlighted a decline in the abundance of oak over time, in favour of the two most competitive species of beech and hornbeam. Oak is still present on 22% of the sites 19 years after the canopy was opened despite its low density. It also shows growth equivalent or even superior to that of hornbeam and beech, suggesting different development strategies between the three species. Nevertheless, in view of the observed dynamics of the oak, without intervention to promote its regeneration, its future seems uncertain in the coming decades. Finally, our study revealed a greater thermophilisation of the plant communities present in forests that have had an open canopy compared to those in undisturbed forests. By stimulating thermophilization, disturbance thus plays a major ecological role in the adaptation of plant communities to climate change. The importance of large-scale disturbances should therefore not be underestimated, especially in a future climate context where they are likely to intensify
Bellard, Céline. "Effets des changements climatiques sur la biodiversité." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112269/document.
Повний текст джерелаGlobal biodiversity is changing at an unprecedented rate due to loss of habitat, biological invasions, pollution, overexploitation. Furthermore, climate changes and their synergies with other threats will probably become the main drivers of biodiversity loss in the next century. Nowadays, the multiplicity of approaches and the resulting variability in projections make it difficult to get a clear picture of the future of biodiversity due to climate change. Yet, the majority of models indicate alarming consequences for biodiversity, with the worst- case scenarios leading to an increase of extinction rates. The aim of this thesis was to improve the knowledge about of the different consequences of climate change on biodiversity worldwide. To do that I mainly used modelisation and meta-analyses approaches. The first part of my work was to investigate the consequences of sea level rise for the ten insular biodiversity hotspot and their endemic species, during which I highlighted that between 6 and 19% of the islands would be entirely submerged. Then I studied the effects of climate and land use changes on biological invasions worldwide. The results showed that invasives species response to climate and land use changes depend on region, taxa and species considered. We also emphasized that some regions could lose a significant number of invasive alien species. Besides, we also found that hotspot that are mainly islands or group of islands are highly suitable for invasive species. Finally, in the last part, I quantified the exposure of biodiversity hotspots to the combined effects of climate change, land use change and biological invasions. This work highlighted the pressing need to consider different drivers of global change in conservation planning. In addition, we established some prioritization framework among the hotspot. Finally, conservation strategies to protect habitat and species under global changes, can only be achieved through closed collaboration with park managers. Overall, implementation of effective adaptation strategies to climate change can only succeed with public support
Biscéré, Tom. "Effets des métaux et des changements climatiques sur les coraux." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS382.
Повний текст джерелаCoral reefs have largely degraded in recent decades under the influence of human activities. Among those disturbances, the increase in metal concentrations affects many reefs worldwide (e.g. Australian Great Barrier Reef, Costa Rica, Red Sea, New Caledonia). Furthermore, reefs have now to face climate change, and more particularly temperature increase and ocean acidification. In this context, the aims of my thesis were to (1) determine the effects of the main metals present in lateritic sediments (iron, manganese, nickel and cobalt) on coral physiology using concentrations representative of those measured along the New Caledonian coastline, and to (2) define their potential roles in this context of climate change. My results showed that metals affect coral metabolism in different ways. While at ambient temperature, a nickel or manganese enrichment stimulates host metabolism and symbiont photosynthesis, conversely a cobalt enrichment inhibits calcification and becomes even toxic for the host and symbionts, from 1 μg L-1. Despite its importance in photosynthetic processes, an iron enrichment induces a decrease in Symbiodinium densities and an inhibition of calcification rates. Under thermal stress, manganese enhances coral tolerance to temperature increase, likely by stimulating their antioxidant defenses, while nickel worsens its effects by decreasing even more their growth. These works represent an important step towards a better understanding of coral responses to metal enrichment and would explain, to some extent, species susceptibility to climate change
Cheikh, Mohamed Fadel Mohamed Fadel Aghdhafna. "Gouvernance littorale et changements climatiques en Mauritanie." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILA020.
Повний текст джерелаCoastal ecosystems and coastlines are subject to intense pressure, caused by growing human activity and climatic trends that are sometimes irreversible. In Mauritania, the coastal zone is home to 47% of the country's population (mainly in Nouakchott and Nouadhibou) and concentrates almost 80% of the industrial infrastructure on which 98.4% of the country's exports depend.Therefore, more than other countries in the sub-region, rising sea levels are putting a large part of Mauritania's population, infrastructure, ecosystems and maritime resources at risk. Indeed, the vulnerability of Mauritania's coastline no longer needs to be demonstrated. The IPCC has cited this area of the West African coast as one of the very first to suffer from marine submersions in the near future.In view of the importance of this potential for Mauritania's economic structure and the risks affecting it, particularly those linked to climate change, we rise the subsequent problematic: what governance should be put in place for the Mauritanian coastline, specially by the State, local authorities and Mauritania's partners?It is in this context that this thesis aims to the following questions: (i) What are the vulnerable areas on the coast and what are the various threats? (ii) What are the existing methods of managing the coast and how can they respond to the ever-increasing constraints caused by climate change and its interactions with human activity?Given its complexity, the size of Mauritania's coastline and the diversity of stakeholders with conflicting interests, improving coastal governance must be based on consultation, transparency and equity. This requires a legal framework and appropriate consultation, coordination and cooperation mechanisms. Management, research, observation, information, communication and monitoring & evaluation capacities must also be consolidated and strengthened.The results obtained will contribute to (i) improving knowledge about the Mauritanian coastline; (ii) establishing sustainable and appropriate management of the coastline; (iii) contributing to the fight against climate change.Key words: Governance, Coastline, Climate change, Mauritania
Lempereur, Morine. "Variabilité saisonnière et interannuelle de la croissance du chêne vert méditerranéen et vulnérabilité au changement climatique." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS075/document.
Повний текст джерелаTree secondary growth is responsible for woody biomass accumulation and is a major component of carbon storage in forest ecosystems. Environmental constraints on secondary growth in Mediterranean ecosystems must, however, be described in more to details to better understand how they will be modified by climate change. This dissertation aims at studying the functional responses of Mediterranean holm oak (Quercus ilex) to seasonal and inter-annual climate variations through the study of carbon allocation to secondary growth. Different experimental approaches, at spatial scales ranging from tree rings to the ecosystem and at temporal scales from the day to several decades, were used to identify the main environmental constraints (water availability, temperature warming, competition) to secondary growth and carbon isotopic composition of tree rings. The phenology of stem growth shows evidence for a direct environmental control on annual growth by winter temperature and summer drought that is more limiting than the carbon supply from photosynthesis. Climate change from 1968 to 2013 resulted in earlier water limitation on secondary growth, which was compensated by earlier growth onset, due to warmer winter temperature, and higher water use efficiency, due to increased atmospheric CO2 concentration. Thinning reduced tree mortality and increased stem growth, so thinning management in old holm oak coppices could prepare the ecosystem to better withstand the increasing drought forecasted for the Mediterranean region
Pey, Alexis. "Réponses biochimiques et physiologiques des symbioses marines tempérées face aux changements climatiques." Nice, 2012. http://www.theses.fr/2012NICE4009.
Повний текст джерелаGlobal climate change leads significant reactions on marine ecosystems which, when dealing with sessile species, can drive to episodes of mass mortalities. In the north-western Mediterranean Sea, recent events of mortalities severely impacted gorgonian communities, threatening their survival, but also all the associated biodiversity. The implementation of strategies of preservations requires preliminary acquisitions of the knowledge at ecological, evolutionary, physiological, biochemical, genomic and genetics levels. In this ambitious framework, these doctoral studies aimed to better define the answers induced by thermal stress of two Mediterranean symbiotic Cnidarians : the white gorgonian Eunicella singularis and the sea anemone Anemonia viridis. A first part of the works was carried out of two populations of the white gorgonian, associated with their photosynthetic symbionts (zooxanthelles), collected at two geographical zones with contrasted thermal profiles. This study allowed us to identify the superior limits of thermal resistance of the populations and to estimate the possible links between the genetic varieties of the hosts and the symbionts, and their thermal resistance. Complementary studies then allowed identifying, on this symbiotic gorgonian early molecular indicators induced by a hyperthermia, implying the global antioxidant defences capacities and the degree of protein ubiquitination. Finally, our studies led on the sea anemone allowed to deepen our knowledge developed on this model concerning the antioxidant enzymes and in particular the glutathione peroxidases (GPx). The measures of the GPx activities in the different holobiont compartments did not reveal major modifications during the stress, but the appearance of one activity band induced by the hyperthermia could represent a new potential marker of stress
Thiam, Papa Masseck. "Effets des futurs changements climatiques sur la performance à long terme des chaussées souples au Québec." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30293/30293.pdf.
Повний текст джерелаThe long-term performance of the road network of the province of Quebec (Canada) is strongly influenced by the climate and the weather conditions. Amongst other factors, high levels of saturation in soils and pavement materials are believed to be an important cause of pavement deterioration. According to the climate change scenarios established by Ouranos (2010), the North and South of Quebec will undergo an average precipitation increase from -0.1% to 8.45% in a future horizon of 2010-2039. The purpose of this project is to quantify the effect of these expected precipitation increases on the mechanical behavior of road structures, materials and soils. Based on literature and on data collected on instrumented road sections, a relationship between precipitation increase and saturation level of pavement layers is proposed. The resilient modulus and permanent deformation behavior for various water contents and four different subgrade soils was determined using triaxial tests, which were validated using small-scale heavy vehicle simulator, in order to determine the existing relationship between mechanical properties and moisture contents. Using the precipitation increase scenarios and the preset models, a damage analysis is performed to quantify the decrease of pavements service life caused by climate change. It is found that climate change, and more precisely the increase of precipitation expected in the Province of Quebec, will have a significant impact on pavement performance and that adapted pavement structures and materials, such as improved drainage, increased structural capacity or materials with reduced sensitivity to water, are possible options to reduce the loss of pavement life associated with climate change.
Joannin, Sébastien. "Changements climatiques en Méditerranée à la transition Pléisctocène inférieur-moyen : pollens, isotopes stables et cyclostratigraphie." Lyon 1, 2007. https://tel.archives-ouvertes.fr/tel-00347549.
Повний текст джерелаPollen analysis has been performed on six sections (Santa Lucia, Montalbano Jonico, Site ODP 976; Tsampika and Shamb) placed along a 4,000 km long transect from the Western Mediterranean region to Little Caucasus. These sections recorded same vegetation changes related to climatic cycles occurred throughout the Mediterranean region during the Early-Middle Pleistocene (1. 600-0. 700 Ma), despite an observed longitudinal gradient. Mesothermic taxa were affected by the increasing aridity and the extremes related to climatic cycles during this considered time-window. “Long-term” vegetation successions were controlled by climatic cycles related to the obliquity forcing. A similar vegetation dynamics with short and longer-term durations were forced by precession and its modulator (the eccentricity), respectively. Influences of both parameters were superimposed. The expected shift from obliquity to 100 ka long-cycles related to eccentricity is not observed in the Mediterranean region during the Mid-Pleistocene Transition
Книги з теми "Chênes – Effets des changements climatiques"
Dussey, Don Ayan. L'homme face aux effets nefastes de changements climatiques. Lomé, Togo: Publications de CERDIA, 2003.
Знайти повний текст джерелаWilliamson, T. B. Climate change and Canada's forests: From impacts to adaptation. Edmonton: Sustainable Forest Management Network, 2009.
Знайти повний текст джерелаExamen scientifique des effets des changements climatiques sur les organismes nuisibles aux végétaux. FAO pour le compte du Secrétariat de la Convention internationale pour la protection des végétaux, 2021. http://dx.doi.org/10.4060/cb4769fr.
Повний текст джерелаExamen scientifique des effets des changements climatiques sur les organismes nuisibles aux végétaux. FAO pour le compte du Secrétariat de la Convention internationale pour la protection des végétaux, 2021. http://dx.doi.org/10.4060/cb4777fr.
Повний текст джерелаAcot, Pascal. Histoire du climat : Du Big Bang aux catastrophes climatiques. Librairie Académique Perrin, 2009.
Знайти повний текст джерелаHistoire du climat : du big bang aux catastrophes climatiques: Pascal Acot. [Paris]: Perrin, 2004.
Знайти повний текст джерелаЧастини книг з теми "Chênes – Effets des changements climatiques"
DIELE-VIEGAS, Luisa Maria. "Biogéographie et changement climatique." In La biogéographie, 327–44. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9060.ch12.
Повний текст джерела"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.
Повний текст джерелаЗвіти організацій з теми "Chênes – Effets des changements climatiques"
Iyer, Ruhil, and 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, August 2022. http://dx.doi.org/10.19088/slh.2022.017.
Повний текст джерелаBibiane Ndjebet, Cécile, and Phil René Oyono. Bassin du Congo : La sécurisation des droits fonciers des femmes lue à travers la théorie des droits de propriété. Rights and Resources Initiative, December 2020. http://dx.doi.org/10.53892/qaxg4403.
Повний текст джерелаMeloche, Jean-Philippe, Jérôme Dupras, Andrew Gonzales, Justin Leroux, and François Vaillancourt. Étude sur la mise en œuvre d’outils d’écofiscalité au service de la conservation et de l’adaptation aux changements climatiques dans les basses-terres du Saint-Laurent. CIRANO, June 2023. http://dx.doi.org/10.54932/kgdx2810.
Повний текст джерелаMeloche, Jean-Philippe, Cédric Bourbonnais, Arnaud Dragicevic, Tejasvi Hora, Noémie Lacroix, Julie Lebert, Justin Leroux, et al. Étude sur la mise en œuvre d’outils d’écofiscalité au service de la conservation et de l’adaptation aux changements climatiques dans les basses-terres du Saint-Laurent. CIRANO, June 2023. http://dx.doi.org/10.54932/momv7435.
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