Letteratura scientifica selezionata sul tema "Acidification – Environnement"
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Articoli di riviste sul tema "Acidification – Environnement"
Renaud-Gentié, C., V. Dieu, M. Thiollet-Scholtus, H. M. G. van der Werf, A. Perrin e A. Mérot. "L'Analyse du Cycle de Vie pour réduire l'impact environnemental de la viticulture biologique". BIO Web of Conferences 15 (2019): 01031. http://dx.doi.org/10.1051/bioconf/20191501031.
Testo completoDOURMAD, J. Y., L. DELABY, J. L. BOIXADERA, C. ORTIS, B. MÉDA, C. GAIGNÉ e B. DUMONT. "Diversité des services rendus par les territoires à forte densité d'élevages, trois cas d'étude en Europe". INRA Productions Animales 30, n. 4 (25 giugno 2018): 303–20. http://dx.doi.org/10.20870/productions-animales.2017.30.4.2261.
Testo completoTesi sul tema "Acidification – Environnement"
Caville, Sylvain. "Spectroscopie embarquée pour la distribution verticale d'ammoniac (NH3) et de dioxyde de carbone (CO2)". Electronic Thesis or Diss., Reims, 2024. http://www.theses.fr/2024REIMS008.
Testo completoAmmonia (NH3) is an atmospheric pollutant, emitted at 80 % by agriculture, which contributes to the eutrophication and acidification of natural environments. It is also a precursor of fine particles (PM2.5) that are harmful to human health. Despite this major scientific and societal role, our knowledge about atmospheric ammonia is still very limited. Measuring the vertical profile of NH3 is one of the keys to improving this knowledge. For this reason, the main objective of this thesis is to develop an ammonia measurement instrument that can be embedded in a tethered balloon to measure these vertical profiles. To begin, a state of the art of NH3 measurement was carried out through the data analysis of the AMICA campaign (Multi-Instrumental Analysis of Ammonia Concentrations) in autumn 2021. It highlighted the need to design an instrument without a sampling system to avoid bias due to NH3 adsorption. To assess the infrared spectroscopy techniques (DAS and WMS) intended for NH3 detection, a first instrument aimed at atmospheric CO2 measurements (main anthropogenic greenhouse gas) was developed and used to carry out vertical profiles. As NH3 is much more difficult to detect than CO2 , a long-path optical cell was designed to improve the instrument’s sensitivity. On a more general level, the tools developed and implemented during this thesis can be applied to the measurement of all the atmospheric species of interest, and in particular those that exist in trace quantities
Monserrat, Barcelo Margalida. "Régression des forêts marines : causes et effets dans le cadre de leur conservation et restauration". Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ4011.
Testo completoLarge brown forest-forming macroalgae are dominant foundation species, ecosystem engineers of marine macroalgal forests. In the Mediterranean Sea, they are mainly represented by Cystoseira sensu lato spp. most of wich are endemic. They are also characterized for being long-lived species with short dispersal of the zygotes. Marine forests are one of the most productive and diverse ecosystems on earth. However, anthropogenic impacts are pushing them to the edge, causing regime shifts towards less complex communities such as shrubs, turfs, or even barren grounds. Marine forest loss affects the whole ecosystem, eventually making it more vulnerable to emergent phenomena such as benthic harmful algal blooms (BHAB). BHAB of the genus Ostreopsis spp. have been expanding in recent decades through temperate regions such as the Mediterranean Sea, where they have important public health, ecological and economic consequences. Major blooms are generally observed on macroalgal turfs and shrubs, suggesting that less structurally complex macroalgal communities could have an active role in promoting the proliferation of blooms.The main objectives of this thesis are (i) to assess some abiotic (climate change) and biotic (herbivory) causes of marine forests loss in the Mediterranean Sea and (ii) the potential consequences this loss can have in the context of BHABs proliferation. In the first two chapters, the causes of Cystoseira s.l. spp. loss were assessed. In Chapter 1, the effects of climate change and species facilitation on the recruitment of Cystoseira compressa were studied in controlled laboratory experiments. The major results from this chapter show that the interactive effects of ocean warming and acidification negatively affect C. compressa recruits, which are also negatively affected by the presence of crustose coralline algae. In Chapter 2 the grazing pressure and the effects of different invertebrates on recruits of C. compressa were assessed through field surveys and both field and laboratory-based experiments. The results obtained show a high grazing rate of several common invertebrate species (molluscs, decapods et isopods) on recruits of C. compressa, representing a threat to natural populations in the long term, but also affecting the success of restoration actions. In chapters 3 and 4 the consequences of forest loss and in particular, the facilitation of Ostreopsis spp. blooms was approached by a literature review and field experiments. The review, reported in Chapter 3, focussed on the role of habitat in the facilitation of Ostreopsis spp. blooms. Despite an evident lack of information at the global scale on the meso- and macro-habitat fostering Ostreopsis spp. blooms, the present knowledge suggests a relationship between the abundance of Ostreopsis spp. and the complexity of the macroalgal communities. In Chapter 4 Ostreopsis spp. blooms have been studied in relation to macroalgal communities in field experiments in Italy and in France. A high variability on Ostreopsis spp. abundances was observed in the different macroalgal species and communities sampled, in some cases likely hiding other potential patterns of Ostreopsis spp. preferences. Larger scale studies would be needed to confirm these results.These findings provide important insights into the causes and effects of Cystoseira s.l. spp. loss and are of major interest for the conservation of Mediterranean marine forests, contributing to the development of effective management measures. The results presented support the importance of marine forests restoration in the Mediterranean Sea, as recommended by the 2030 European Biodiversity Strategy, the United Nations Decade on Ecosystem Restoration and the 2030 Agenda for Sustainable Development objectives. Such restoration actions will not only increase the productivity and biodiversity of coastal ecosystems but could potentially mitigate the public health, ecological and economic consequences of Ostreopsis spp. blooms
Noisette, Fanny. "Impacts de l'acidification des océans sur les organismes benthiques calcifiants des milieux côtiers tempérés". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2013. http://tel.archives-ouvertes.fr/tel-00925830.
Testo completoDELETRAZ, Gaelle. "Géographie des risques environnementaux liés aux transports routiers en montagne. Incidences des emissions d'oxydes d'azote en vallées d'Aspe et de Biriatou (Pyrénées)". Phd thesis, Université de Pau et des Pays de l'Adour, 2002. http://tel.archives-ouvertes.fr/tel-00003245.
Testo completoLibri sul tema "Acidification – Environnement"
météorologique, Canada Service, a cura di. Évaluation scientifique 2004 des dépôts acides au Canada. Downsview, Ontario: Service météorologique du Canada, 2005.
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