Добірка наукової літератури з теми "Lagune Méditerranéennes"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Lagune Méditerranéennes".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Lagune Méditerranéennes":
Louiz, Ibtissem, Mossadok Ben Attia, and Oum Kalthoum Ben Hassine. "Perturbations de la reproduction chez Zosterisessor ophiocephalus (Pisces, Gobiidae) dans une lagune méditerranéenne polluée (Bizerte, Tunisie)." Revue d'Écologie (La Terre et La Vie) 73, no. 3 (2018): 227–41. http://dx.doi.org/10.3406/revec.2018.1931.
Dias, Íris, Carlos Pereira, Elisa Sousa, and Ana Margarida Arruda. "Aspectos cotidianos romanos en el Algarve. Los artefactos de hueso de Monte Molião (Lagos, Portugal)." Vínculos de Historia Revista del Departamento de Historia de la Universidad de Castilla-La Mancha, no. 11 (June 22, 2022): 311–38. http://dx.doi.org/10.18239/vdh_2022.11.14.
Bejaoui, Béchir, Dhouha Ferjani, Noureddine Zaaboub, Annie Chapelle, and Mahmoud Moussa. "Caractérisation hydrobiologique saisonnière de la lagune de bizerte (Tunisie)." 23, no. 3 (October 25, 2010): 215–32. http://dx.doi.org/10.7202/044686ar.
Дисертації з теми "Lagune Méditerranéennes":
Daoudi, Mouna. "Peuplements phytoplanctoniques, risques toxiques et qualité de l'eau de deux lagunes méditerranéennes : lagune de Nador (Maroc) et lagune de Canet-St-Nazaire (France)." Perpignan, 2011. http://www.theses.fr/2011PERP1091.
David, Marine. "Influence des apports d'eaux souterraines sur le fonctionnement hydrologique et biogéochimique des lagunes méditerranéennes : cas de la lagune de l'Or." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG039.
At the interface between the continent and the sea, Mediterranean lagoons are vulnerable to excessive nutrient inputs from anthropogenic activities, causing eutrophication of the water bodies. Even management actions have been implemented on the watershed to reduce nutrient fluxes to the coastal zone, some lagoons remain in a bad ecological status according to the Water Frame Directive, highlighting the need for improving our understanding of the land-sea continuum. On the Mediterranean coast, little is known on groundwater inputs, their associated nutrient fluxes and their impact on lagoons in a bad ecological status. The aim of this PhD thesis was to improve our understanding of two main hydrological processes associated with groundwater: 1) continental groundwater inputs, as a new nutrient source to the lagoon from the adjacent aquifers and 2) pore water recirculation, driving nutrient from sediments to the water column through advective water flow, as a regenerated nutrient source. Or lagoon, whose bad ecological status has not improved over the last decade despite management actions, was chosen as a study site. Investigations the watershed revealed that important loads of nitrogen, originating from continental groundwater, was discharged to the lagoon through the streams. Experiments on lagoon sediments suggested that the muddy characteristics of Or lagoon induced low pore water recirculation fluxes. Hence, the majority of groundwater inputs to Or lagoon occurs through the streams from the continental aquifer. An annual nutrient budget enabled to conclude that given the importance of two main contributors (canalette and Rhône to Sète canal), groundwater inputs are not the major nutrient source to Or lagoon. The work carried out in this lagoon in a bad ecological status contributes to improving our understanding of nutrient fluxes on the land-sea continuum, in order to prioritize actions to be implemented to reach a good ecological status on Mediterranean lagoons
Regis, Julie. "Impact des hypoxies sur la mobilité des nutriments et ETMM présents dans les sédiments des lagunes méditerranéennes." Electronic Thesis or Diss., Nîmes, 2024. http://www.theses.fr/2024NIME0002.
Studies carried out in recent years have shown that oxygen concentration in the water column is the main factor controlling all biogeochemical reactions in surface sediment, as well as controlling transfers of nutrients, trace elements (TE) at the sediment water interface (SWI). Three lagoons on France’s Mediterranean coast (Berre, Thau and Prévost) are among the world’s most eutrophied coastal zones impacted by hypoxia episodes, with high accumulations of nutrients, metals and metalloids in their sediment. They are also characterized by different benthic habitats, some of which include macrophytes, which have been shown to regulate nutrient flux at IES. This thesis project aims to better understand the impact of deoxygenation phenomena on the mobility of nutrients and TE present in Mediterranean lagoon sediment, in the presence of different benthic habitats representing their eutrophication gradient. The results show that the Berre lagoon is the site most impacted by long-lasting (1 week) and seasonal episodes of deoxygenation; the Prévost lagoon exhibits wide nycthemeral variations, going from hypoxia to hyperoxia in less than 12 h during the summer season; the Thau lagoon site seems the most resilient about deoxygenation. Under summer conditions, sediment and porewater concentrationprofiles show enrichments in nutrients and sulfides in the substrates of benthic habitats in lagoons with the most advanced eutrophication status (Berre and Prévost), and also in the presence of macroalgae (Prévost and Thau). These enrichments are the result of strong organic matter mineralization, and the more reducing conditions in these habitats binding the TE (As, Sb, Cd, Pb, Zn, Ni, Cu, Co, Hgtot) to the solid phase of the sediment. Comparison with available environmental thresholds enables us to identify habitats in the Berre lagoon that are highly at risk in terms of eutrophication support, remobilization of TE at SWI and ecotoxicological risk. The acquisition of dissolved oxygen concentration gradients within the benthic boundary layer (BBL) at high temporal resolution has enabled us to identify the high oxygen demand of sediment in the Berre lagoon and the nighttime deoxygenations resulting from the presence of opportunistic macroalgae in the Prévost lagoon. The punctual acquisition of concentration gradients illustrates nutrient exports from the sediment to the water column that are more intense under anoxic and euxinic conditions, and exports ofMn, Fe, As, Co under hypoxic conditions. However, concentration gradients under euxinic conditions indicate the trapping of TE (Mn, Fe, Cu,Mo) with the sulfide phases of the sediment. In addition, in situ and ex situ incubation experiments under "forced" deoxygenation conditions for the various benthic habitats present at these three sites yielded SWI fluxes that also followed this trend. Nutrient fluxes were shown to intensify following deoxygenation in eutrophied bare sediment habitats affected by deoxygenation (Berre) and specifically in habitats containing opportunistic (Prévost) and perennial (Thau) macroalgae. For these same habitats, the most intense exports of TE (Mn, Fe, As, Co, V , Mo) were measured under hypoxic and anoxic conditions, while fluxes decreased or reversed under euxinic conditions. This comparative and experimental field approach brings an integrative biogeochemical perspective on the chemical quality of sediment in lagoon environments undergoing re-oligotrophication. It provides a context for their great temporal variability, as well as their vulnerability to climate change
Lagarde, Franck. "Écologie de la reproduction de l'huître Crassostrea gigas en lagune méditerranéenne." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS470.
The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurrence of spat outbreak related to the emergence of an Ostreid Herpes-virus µvar. The scarcity of spat and the speculation on this product changed regionally cultural practices and the supply of juveniles, with in particular the wish of developing a local activity of spat collection. However the cycle of reproduction of the species and the recruitment of juveniles were poorly known in lagoon environments. In this context, the objective of this thesis is to characterize the variability of the reproduction and the recruitment of the cupped oyster in Mediterranean lagoon. The lagoon configuration offers the advantages of productivity for the broodstock and hydrodynamic connectivity for the larvae. However, it appears that the ecological functioning of the system at the base of the primary production plays an essential role on the trophic resources for the success of oyster reproduction. This work takes place in the context of the ecological restoration under oligotrophication, which first effects we describe on the oyster's reproductive cycle
Bec, Béatrice. "Dynamique du picophytoplancton dans les lagunes méditerranéennes du Languedoc-Roussillon et de Corse." Toulouse 3, 2005. http://www.theses.fr/2005TOU30218.
Located at the land-sea interface, coastal lagoons exhibit a large variety of hydrological and geomorphological conditions, particularly interesting to study the picophytoplankton dynamics. Among 24 lagoons, the autotroph picoplankton is represented by phycoerythrin-rich cyanobacteria (CYAN), phycocyanin-rich cyanobacteria and picoeukaryotes (PEUK). Salinity, turbidity and nutrient load are the main factors determining the dominance and variations in abundance of the three picoplanktonic components. Most lagoons exhibit a steady-state regime where continuous nutrient supplies, mainly coming from sewage treatment plants, are instantly absorbed by massive picoeukaryote blooms. Nanophytoplankton (NANO) development is limited to lagoons under the direct influence of river inputs leading to high nutrient pulses. The size difference between CYAN, PEUK and NANO impacts on their nutrient acquisition and growth potentials determining their distribution along the eutrophication gradient
Yahyaoui, Ahlem. "Conflits d'usage environnementaux sur les rives de la lagune de Bizerte (Tunisie) : une mise en perspective méditerranéenne." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0706/document.
The dissertation seeks to recognize the socio-spatial meanings of dynamic conflicts related to the environment in the lagoon and to assess its effects in terms of environmental governance as well. The analysis concentrates on the reasons and the genesis of the actors’ oppositions at work around the lagoon of Bizerte (Tunisia) and the pond of Berre (Marseille). Putting the light on these conflicts represents an issue for the integrated wetland management. This topic has been tackled on by other researchers. However, it remains a major interest due to the knowledge and the originality of the territory. Particularly, the thesis raises the question of the potential impacts that conflicts can have on organizations and institutions in place. In fact, is it possible that public action will be renewed to follow the emergence or conflicts regulation? This question is tied to the challenges of the current and major companies and to an extreme rapidity of territory changing: Bizerte’s lagoon is situated on the southern shore of the Mediterranean and in a country where the regime is in continuous transition. This research covers the ground to study the potential emergence of the participative approach and the social integration of environmental issues in coastal, urban and rural territory
Abadie, Eric. "Etude de Vulcanodinium rugosum (Dinoflagellé producteur de pinnatoxines) se développant dans la lagune méditerranéennede l’Ingril." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS188/document.
Harmful and / or toxic phytoplankton blooms impact for a long time marine ecosystems worldwide. These massive developments have an adverse effect on ecosystems and their exploitation. The lagoons of the region Languedoc-Roussillon are affected for decades. In addition to recurring health risks from Dinophysis (DSP toxins) and Alexandrium (PSP toxins), Vulcanodinium rugosum was identified in 2011 in the lagoon Ingril. This new species product pinnatoxins (neurotoxins). Through this thesis work, the biology of this new species (life cycle, growth condition, toxin production), its shellfish contamination capacity and geographic distribution in neighboring lagoons were studied on cultures in the laboratory and via environmental monitoring.The results of this study have demonstrated its thermophilic and euryhaline features (optimum salinity and temperature of 25°C and 40 respectively) and its growth ranges between 20 and 30°C. Its ability to grow on an organic nitrogen source (urea) has been showed in vitro. Its expansion in other lagoons of Languedoc-Roussillon, was confirmed by the contamination of the mussels by the pinnatoxin G. The survival of this organism in the digestive tract of mussels and oysters proves that the transfer of shellfish is potentially a source of contamination of new ecosystems not yet affected by this toxic species.The life cycle of V. rugosum has not been fully described because the resistance cyst has not been formally identified. Temporary cysts appear as very important stages to be considered because of their ability to divide and their strong presence on macrophytes. These temporary forms of resistance may be a significant source of contamination of shellfish in the lagoon of the Ingril even when the vegetative cells of V. rugosum are weakly present in the water column. Because of the low densities of V. rugosum in situ and the difficulty of its identification on morphological criteria, the monitoring within the REPHY protocol remains difficult. Thus the use of passive sampling systems (Spatt) made with resins which adsorb toxins dissolved in water would make possible the early detection of toxins associated with these emerging benthic species. This study highlights the growth of an emerging thermophilic species that might with others and thanks to climate change provide important health and economic problems in vulnerable lagoon ecosystems of the Mediterranean
Yahyaoui, Ahlem. "Conflits d'usage environnementaux sur les rives de la lagune de Bizerte (Tunisie) : une mise en perspective méditerranéenne." Electronic Thesis or Diss., Aix-Marseille, 2018. http://theses.univ-amu.fr.lama.univ-amu.fr/181024_YAHYAOUI_465hyeh752pqoh615vivk996ykhs_TH.pdf.
The dissertation seeks to recognize the socio-spatial meanings of dynamic conflicts related to the environment in the lagoon and to assess its effects in terms of environmental governance as well. The analysis concentrates on the reasons and the genesis of the actors’ oppositions at work around the lagoon of Bizerte (Tunisia) and the pond of Berre (Marseille). Putting the light on these conflicts represents an issue for the integrated wetland management. This topic has been tackled on by other researchers. However, it remains a major interest due to the knowledge and the originality of the territory. Particularly, the thesis raises the question of the potential impacts that conflicts can have on organizations and institutions in place. In fact, is it possible that public action will be renewed to follow the emergence or conflicts regulation? This question is tied to the challenges of the current and major companies and to an extreme rapidity of territory changing: Bizerte’s lagoon is situated on the southern shore of the Mediterranean and in a country where the regime is in continuous transition. This research covers the ground to study the potential emergence of the participative approach and the social integration of environmental issues in coastal, urban and rural territory
Fillit, Muriel. "Eutrophication et macroalgues dans une lagune littorale méditerranéenne : (étang de Méjean-Pérols) : l'étang change, les ulves prospèrent." Montpellier 2, 1995. http://www.theses.fr/1995MON20195.
Le, Fur Ines. "Rôle des macrophytes dans la restauration des milieux lagunaires : successions écologiques." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG006/document.
The growing awareness of the negative impacts of the degradation of the water quality in coastal lagoons because of eutrophication has resulted in public action aiming at the reduction of the nutrient loadings into these lagoons. Hence, some of these coastal lagoons are currently undergoing ecological restoration and have shown a clear improvement of their water quality linked to decreasing phytoplankton biomass in the last 10 years. However, the response of the benthic macrophytes appears more complex, particularly by showing non-linear behaviour. By using complementary approaches including statistical analyses of long-term observations (1998-2015) and in situ measurements, this thesis aims to describe the dynamics of the macrophytes in space and time and to study their functional role during the oligotrophication process. Salinity, depth and nutrient concentrations in the water column represent the main factors that statistically explain the distribution of the benthic macrophyte communities in Mediterranean coastal lagoons. The first steps of the ecological restoration in eutrophied polyhaline and euhaline lagoons has been inferred from the statistical analysis of time series in 21 coastal lagoons. The reduction of the external nutrient loading results in a rapid regime shift (3-4 years) from a phytoplankton-dominated system to a macroalgae-dominated system, with particularly Ulva species. The decreasing inorganic nitrogen concentrations due to uptake by Ulva spp. in the water column appears to facilitate the development of Gracillaria spp. (red algae) and Chaetomorpha spp. (green filamentous algae). While the appearance of these macroalgal species is the result of the ecological restoration, these species also play a central role in this process by regulating the biogeochemical element fluxes. This way these species create more favourable conditions for perennial species. Although for re-oligotrophication trajectories in coastal lagoons our theory describes a tendency towards the return of perennial species, so far, we have not been able to document their return after a long period of absence. This shows, that among other factors, the internal nutrient loading and ecological connectivity are important factors to take into account for the recolonization of angiosperms in coastal lagoons
Частини книг з теми "Lagune Méditerranéennes":
Crouzet-Pavan, Élisabeth. "Une logique historique de la pénurie : Venise face à sa lagune." In La fabrique des sociétés médiévales méditerranéennes, 119–27. Éditions de la Sorbonne, 2018. http://dx.doi.org/10.4000/books.psorbonne.40388.
Тези доповідей конференцій з теми "Lagune Méditerranéennes":
HAMOUMI, Naima, Touria HSSAIDA, Loubna TERHZAZ, and Mohammed El Amine HAZIM. "Contrôle et évolution des milieux écologiques de la lagune de Nador (Maroc)." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2011. http://dx.doi.org/10.5150/cmcm.2011.039.
HAMOUMI, Naima, Ahmed HOURIMECHE, Moustapha CHAFIK, Mohammed El Amine HAZIM, Loubna TERHZAZ, Rabii KHARBAOUI, and Abdelkarim LOUAYA. "Contrôle et évolution des milieux sédimentaires de la lagune de Nador (littoral méditerranéen oriental, Maroc)." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2011. http://dx.doi.org/10.5150/cmcm.2011.038.
TELAHIGUE, Faten, Younes JEDOUI, and Mabrouk MONTACER. "Morphologie et sédimentologie d'un environnement littoral abrité : cas de la lagune d'Aouled Ridha, Sud-Est tunisien." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2009. http://dx.doi.org/10.5150/cmcm.2009.040-5.
DAGHOR, Lamia, Touria HSSAIDA, Naima HAMOUMI, Sara CHAKIR, Btissam ENEFFAH, Mohamed FRAIKCH, and Keltoum EL BOUHMADI. "Réponse des populations phytoplanctoniques (kystes et formes végétatives) face aux changements environnementaux dans les lagunes de Sidi Moussa et Oualidia, Maroc." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2015. http://dx.doi.org/10.5150/cmcm.2015.056.
MEHDI, Khalid, Franck LAVIGNE, Khalid EL KHALIDI, Samira MELAS, Clérmont VIRMOUX, Bendahhou ZOURARAH, Daniel BRUNSTEIN, and Alexandre SAHAL. "Apport du radar Géologique (GPR) à la connaissance de la répartition spatiale de dépôts de tempêtes des lagunes de Sidi Moussa et Oualidia (côte ouest atlantique marocaine)." In Conférence Méditerranéenne Côtière et Maritime - Coastal and Maritime Mediterranean Conference. Editions Paralia, 2011. http://dx.doi.org/10.5150/cmcm.2011.047.