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| Registros recuperados: 132 | |
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| Abdou, Melina; Schafer, Jorg; Hu, Ruoyu; Gil-diaz, Teba; Garnier, Cedric; Brach-papa, Christophe; Chiffoleau, Jean-francois; Charmasson, Sabine; Giner, Franck; Dutruch, Lionel; Blanc, Gerard. |
| Platinum (Pt) is considered a Technology Critical Element (TCE) and an emerging metallic contaminant with increasing release into the environment. Gaps in knowledge and understanding of environmental levels, fate and effects of Pt still exist, especially in the marine environment. This work presents Pt concentrations in the northwestern Mediterranean coast including: (i) temporal variability from sediment cores and farmed mussels in the Toulon Bay (historically affected by intense human activities) and (ii) spatial distribution from recent wild mussels collected along ∼ 300 km coastline with contrasting ecosystems (including natural reserves), quantified using voltammetry and inductively coupled plasma-mass spectrometry. The historical (> 100 years)... |
| Tipo: Text |
Palavras-chave: Platinum; Sediments; Mussels; Biomonitoring; Mediterranean coast. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00460/57134/59055.pdf |
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| Mejanelle, Laurence; Riviere, Beatrice; Pinturier, Laurence; Khripounoff, Alexis; Baudin, Francois; Dachs, Jordi. |
| Hydrocarbons were analyzed in sediments from the Congo River deep-sea fan, from the Congo River, and in sinking particles collected by sediment traps 40 m above the sediment. Studied sites encompassed three lobes of decreasing age of formation along the canyon: sites A, F and C and a another lobe system, disconnected from the active channel since 4 ka, Site E. Terrestrial long-chain odd n-alkanes were dominant in all sediments of the lobe system. Unsaturated terpenoids sourced by higher plants, such as gammacerene, lupene, ursene and oleanene, were also detected. At site C, characterized by high accumulation rates (10–20 cm yr−1), the organic matter spends less time in the oxic layer than at other sites and high phytadiene concentrations (10 to 17 μg... |
| Tipo: Text |
Palavras-chave: Congo fan; Hydrocarbons; NAH; Hopanes; Hopenes; Sediments; Turbidite system. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49902/50472.pdf |
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| Bianchi, A; Calafat, A; De Wit, R; Garcin, J; Tholosan, O; Cacho, I; Canals, M; Fabres, J; Grout, H; Masque, P; Sanchez-cabeza, Ja; Sempere, R. |
| Microbiological and biogeochemical studies were carried out in sediments and near bottom waters in the upwelling area off the Malaga coast and in the Almeria-Oran frontal zone. In these nutrient-rich conditions, metabolic activity is potentially limited by oxygen availability through the sediment depth. In the surficial sediments of the frontal zone, however, oxygen penetrated to a depth of 4 cm, allowing oxic mineralisation processes to occur throughout the layer. In the surficial sediments of the upwelling area, oxygen penetration was limited to the top 2.5 cm, leading to anoxic conditions. Glutamate respiration and global oxygen uptake rates were clearly higher than in the frontal zone. In the superficial sediments of the frontal zone, bacteria were... |
| Tipo: Text |
Palavras-chave: Taux de minéralisation; Sédiments; Eaux profondes; Méditerranée occidentale; Bacteria; Mineralisation rate; Sediments; Deep-sea; Western Mediterranean. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43298/43034.pdf |
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| Reichardt, W. |
| The predominantly anoxic, sulfide-rich sandy sediment of a shallow lagoon at Kiel Fjord was densely inhabited by the polychaete worm Nereis diversicolor (280 cm super(3) m super(-2) of biomass volume). Burrow walls which contrasted by their brown coloration of at least 1.5 mm thickness with the bulk of the reduced black sediment, made up for 6% of the total volume of the 10 cm cores investigated. Only the uppermost mm of the internal surface layer contained detectable O sub(2). As a result of the build up of internal redox gradients, CO sub(2) dark fixation was activated in the burrow walls (by a factor of approximately equals 2). Assays of ribulose-biphosphate carboxylase activities and viable counts of potentially chemoautotrophic bacteria in different... |
| Tipo: Text |
Palavras-chave: Nereis diversicolor; Polychaeta; Bacteria; Microorganisms; Carbon cycle; Tube dwellers; Carbon fixation; Burrows; Bioturbation; Sediments. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-990.pdf |
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| Rees, Hubert; Eggleton, Jacqueline D.; Vanden Berghe, Edward; Aldridge, John; Bergman, Magda J. N.; Boalm,; Cochrane, Sabine; Craeymeersch, Johan A.; Degraer, Steven; Desroy, Nicolas; Dewarumez, Jean-marie; Duineveld, Gca; Essink, Karel; Goethals,; Hillewaert, Hans; Irion,; Kershaw, Peter; Kroncke, Ingrid; Lavayele, Marc; Mason, Claire; Nehring, Stefan; Newell, Richard; Oug, Eivind; Pohlman, Thomas; Reiss, Henning; Robertson, Mike; Rumorh, Heye; Schratzberger, Michaela; Smith,; Van Dalfsen, Jan; Van Hoey, Gert; Vincx, Magda; Willems, Wouter. |
| The ICES Study Group on the North Sea Benthos Project 2000 undertook to integrate recent (1999–2002) macrobenthic infaunal and environmental data from various national sources. The main aim was to compare the outcome with that of the ICES North Sea Benthos Survey conducted in 1986, to identify any significant changes and their likely causes. In the process, the exercise yielded valuable lessons for the conduct of international collaborative programmes, as well as insights into the utility of a range of interpretational tools. These are timely in view of increasing requirements for periodic sea-wide assessments of quality status to meet international obligations, such as those under OSPAR, ICES, HELCOM, and EU auspices for European waters. This paper... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Infauna; Sediments; Communities; Ecosystems; North Sea. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00158/26893/25024.pdf |
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| Chouba, L.; Mzougui-Aguir, N.. |
| Dans l’objectif de déterminer l’état de la contamination organique et inorganique des sédiments superficiels de la frange côtière du golfe de Gabès, nous avons évalué les concentrations en hydrocarbures aromatiques totaux, en cadmium (Cd), en plomb (Pb) et en mercure (Hg). L’échantillonnage a été effectué à bord d’une barque motorisée, à l’aide d’une benne Van Veen au niveau de 25 stations. Les concentrations du Cadmium et du Plomb ont été déterminées par Spectrométrie d’Absorption Atomique à Four Graphite (Varian 220Z) alors que pour le Mercure les analyses ont été réalisées par Spectrométrie d’Absorption Atomique à vapeur froide. Les hydrocarbures totaux ont été analysés par UV-Fluorescence (UV-F). Les concentrations du Cadmium et du Mercure dans la... |
| Tipo: Journal Contribution |
Palavras-chave: Cadmium; Coastal waters; Hydrocarbons; Lead; Marine pollution; Mercury; Pollution monitoring; Sediments; Trace metals. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/4275 |
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| Liu, Fucheng; Peng, Jun; Zhang, Cunyong. |
| Coastal sediment type map has been widely used in marine economic and engineering activities, but the traditional mapping methods had some limitations due to their intrinsic assumption or subjectivity. In this paper, a non-parametric indicator Kriging method has been proposed for generating coastal sediment map. The method can effectively avoid mapping subjectivity, has no special requirements for the sample data to meet second-order stationary or normal distribution, and can also provide useful information on the quantitative evaluation of mapping uncertainty. The application of the method in the southern sea area of Lianyungang showed that much more convincing mapping results could be obtained compared with the traditional methods such as IDW, Kriging... |
| Tipo: Journal Contribution |
Palavras-chave: Sediments; Mapping. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5835 |
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| Brahim., M.; Abdelfattah., A.. |
| Les analyses granulométriques des sédiments superficiels de la zone côtière située entre Ras Taguermess et Ras Marmours montrent que les petits fonds (-2 à -10 m) sont couverts par des sables fins aux sables grossiers (la moyenne est entre 0,39 et 3,34 ), généralement mal à très mal classés. Cependant, le haut de plage situé entre Ras Taguermess et Ras Marmour est couvert essentiellement par des sables fins et des sables moyens (la moyenne est entre 1,082 et 2,823 ). La répartition spatiale des sables ne montre pas un grano-classement décroissant ou croissant des sédiments de la côte vers le large. Cette distribution est due à l‘existence d’une énergie importante où la houle joue le rôle essentiel sur leur répartition. L’étude granulométrique montre aussi... |
| Tipo: Journal Contribution |
Palavras-chave: Beaches; Coastal zone; Grading; Grain size; Longshore sediment transport; Sand; Sediment analysis; Sediment texture; Sediments; Swell. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4456 |
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| Fernández, M.B.; Cucchi Colleoni, A.D.. |
| Chemical aspects of the San Jorge Gulf benthic system, Argentina (2005-2010). A new contribution on the chemical aspects of the San Jorge Gulf benthic system in the distribution area of shrimp Pleoticus muelleri (Spence Bate, 1888) during 2005-2010 is presented. Concentration of dissolved oxygen in bottom water and mix layer and of total organic matter (TOM), total organic carbon (TOC), total nitrogen (TN), chlorophyll a (Chl a) and phaeopigments (Phaeo) in surficial sediments were analyzed. The origin and nutritional value of TOM deposited were also assessed through the C:N ratio. Water samples were collected during the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) seasonal research cruises in the period 2005-2010. Sediment samples... |
| Tipo: Journal Contribution |
Palavras-chave: Chemical composition; Sediments; Dissolved oxygen; Sea water. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5506 |
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| Rivas, Lourdes; Salazar, Hermes; Peña, Leonel; Núñez, César; Felipe, Miguel. |
| La playa La Puntilla, ubicada en el poblado habanero de Santa Fe, constituye un importante elemento recreacional de uso público, que durante décadas ha experimentado un acelerado proceso de deterioro. Con el objetivo de conocer cuál es el comportamiento actual de la misma, se llevó a cabo un monitoreo con frecuencia trimestral durante los años 2010 y 2011. En cada uno de ellos se realizó un muestreo sedimentológico, colectándose un total de 21 muestras de arena. Además se realizaron nivelaciones en tres perfiles topográficos y mediciones de la línea de costa. Los resultados alcanzados permiten comprobar que el sector más estable de toda la playa es el este, mostrando las menores variaciones morfológicas y del diámetro medio del grano. El balance de los... |
| Tipo: Journal Contribution |
Palavras-chave: Environmental monitoring; Sediments; Beach erosion; Beach profiles; Environmental monitoring; Sediment; Beaches. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4568 |
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| Registros recuperados: 132 | |
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