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Registros recuperados: 17
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3D modelling of summer hypoxia in a highly turbid urbanized macrotidal estuary, coupling hydrodynamics, sediment transport and biogeochemical processes ArchiMer
Lajaunie Salla, Katixa; Sottolichio, Aldo; Thouvenin, Benedicte; Litrico, Xavier; Abril, Gwenael.
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00292/40302/38751.pdf
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Effect of small seagrass Zostera noltei on tidal asymmetry in a semi-enclosed shallow lagoon: the Arcachon Bay (SW France) ArchiMer
Mutterlein, Sarah; Ganthy, Florian; Sottolichio, Aldo.
Tipo: Text
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00320/43121/42655.pdf
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Effects of short flexible seagrass Zostera noltei on flow, erosion and deposition processes determined using flume experiments ArchiMer
Ganthy, Florian; Soissons, Laura; Sauriau, Pierre-guy; Verney, Romaric; Sottolichio, Aldo.
Innovative flume experiments were conducted in a recirculating straight flume. Zostera noltei meadows were sampled in their natural bed sediments in the field at contrasting stages of their seasonal growth. The aims of this study were: (i) to quantify the combined effects of leaf flexibility and development characteristics of Zostera noltei canopies on their interaction with hydrodynamics; and (ii) to quantify the role of Zostera noltei meadows in suspended sediment trapping and bed sediment resuspension related with changes in hydrodynamic forcing caused by the seasonal development of seagrasses. Velocity within the canopy was significantly damped. The attenuation in velocity ranged from 34 to 87% compared with bare sediments and was associated with a...
Tipo: Text Palavras-chave: Arcachon Bay; Flexible vegetation; Flow modification; Flume experiments; France; Sediment resuspension; Sediment trapping; Zostera noltei.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00244/35507/34016.pdf
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Environmental factors controlling biomass development of seagrass meadows of Zostera noltei after a drastic decline (Arcachon Bay, France) ArchiMer
Cognat, Mathis; Ganthy, Florian; Auby, Isabelle; Barraquand, Frederic; Rigouin, Loic; Sottolichio, Aldo.
The relative impact of light, depth, hydrology, hydrodynamics, sediment and nutrients on growth of the seagrass Zostera noltei was investigated in Arcachon Bay, where the extent of seagrass beds has been decreasing for 20 years. A comprehensive multi-parameter survey of 9 sites was conducted monthly over one year. A three-parameter logistic growth model was fitted to biomass data to unravel the relative contributions of environmental factors on seagrass growth. The present study highlights the fact that, in addition to the dominant positive effect of light on plant growth, the hydrological and hydrodynamic parameters were important drivers for Z. noltei growth at the scale of the whole Bay. At the scale of individual sites, other factors such as macroalgal...
Tipo: Text Palavras-chave: Physical parameters; Light; Hydrodynamics; Adaptation; Statistical growth model.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00451/56229/57789.pdf
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Impact of urban effluents on summer hypoxia in the highly turbid Gironde Estuary, applying a 3D model coupling hydrodynamics, sediment transport and biogeochemical processes ArchiMer
Lajaunie-salla, Katixa; Wild-allen, Karen; Sottolichio, Aldo; Thouvenin, Benedicte; Litrico, Xavier; Abril, Gwenael.
Estuaries are increasingly degraded due to coastal urban development and are prone to hypoxia problems. The macro-tidal Gironde Estuary is characterized by a highly concentrated turbidity maximum zone (TMZ). Field observations show that hypoxia occurs in summer in the TMZ at low river flow and a few days after the spring tide peak. In situ data highlight lower dissolved oxygen (DO) concentrations around the city of Bordeaux, located in the upper estuary. Interactions between multiple factors limit the understanding of the processes controlling the dynamics of hypoxia. A 3D biogeochemical model was developed, coupled with hydrodynamics and a sediment transport model, to assess the contribution of the TMZ and the impact of urban effluents through wastewater...
Tipo: Text Palavras-chave: Hypoxia; TMZ; Gironde Estuary; Wastewater; Oxygen; Modeling.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00388/49903/50475.pdf
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In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas : Timing and environmental triggers ArchiMer
Bernard, I.; Massabuau, J. -c.; Ciret, P.; Sow, M.; Sottolichio, Aldo; Pouvreau, Stephane; Tran, D..
The precise environmental conditions under which broadcast spawners spawn in the field remain largely unknown. We investigated this issue in the oyster Crassostrea gigas using three different methods at different time scales in two traditional oyster farming areas of the French Atlantic Coast, the Bay of Arcachon and Marennes-Oléron. We directly recorded spawning at high temporal resolution using high-frequency non-invasive (HFNI) valvometry from 2007–2014 and measured the dry mass and oyster larvae abundance in 2008 and 2009. We analyzed a 29-yr series of oyster D-larvae numbers in the Bay of Arcachon (1982–2010). By combining these three approaches, we demonstrated that during the summer months at both sites, spawning in C. gigas occurs in the morning or...
Tipo: Text
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00312/42335/41666.pdf
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Intratidal and Subtidal Circulation in a Tropical Estuary during Wet Season: The Maroni, French Guiana ArchiMer
Ross, Lauren; Sottolichio, Aldo; Maury, Tanguy; Lesourd, Sandric; Gardel, Antoine.
Observations of water level, current velocity, river discharge, wind and salinity were collected in the Maroni estuary, on the border of French Guiana and Suriname during the wet season of 2018 to explore subtidal circulation patterns. Measurements are complimented by the application of analytical models with an aim to diagnose forcing mechanisms responsible for producing subtidal flows during the day of data collection and to extrapolate these findings to other time periods with variable wind and river forcing. Subtidal along-channel flows were found to be dominated by river discharge, with seaward directed velocities found throughout the channel section reaching 40 cm s −1 . This pattern was altered with strong southwesterly winds, which produced and...
Tipo: Text Palavras-chave: Tropical estuary; Subtidal flow; Wet season; Wind-driven flow; Channel curvature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00594/70588/68772.pdf
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Monitoring water quality in estuarine environments: lessons from the MAGEST monitoring program in the Gironde fluvial-estuarine system ArchiMer
Etcheber, H.; Schmidt, S.; Sottolichio, Aldo; Maneux, E.; Chabaux, G.; Escalier, J. -m.; Wennekes, H.; Derriennic, H.; Schmeltz, M.; Quemener, Loic; Repecaud, Michel; Woerther, Patrice; Castaing, P..
The Gironde Estuary, one of the largest European ones, presents temporary low dissolved oxygen content in its fluvial section close to the Bordeaux urban area. In a context of population growth and of long-term environmental changes, the development of a high-frequency monitoring programme of the fluvial-estuarine system of the Gironde, called MAGEST (MArel Gironde ESTuary), had appeared essential to address current and future water-quality issues/evaluations. The objectives of the MAGEST survey program are to establish a reference database to improve the knowledge of the Gironde Estuary functioning, encompassing the aspects of hydrology, sediment dynamics and biogeochemistry. Through examples of results from intratidal to seasonal time scales, we...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00033/14466/11766.pdf
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Spatio-temporal analysis of co-evolution between seagrass beds distribution and hydro-morphological changes in Arcachon Bay (France) ArchiMer
Cognat, Mathis; Auby, Isabelle; Rigouin, Loic; Sottolichio, Aldo; Ganthy, Florian.
The extent of Zostera spp. meadows in Arcachon Bay has drastically decreased in the last 20 years and a significant increase of suspended sediment concentration was observed in the meantime. Zostera spp. are well known ecosystem engineers able to reduce near-bed currents and promote sediment accretion; it is then suggested that such decline may lead to the observed increase of sediment re-suspension. Main consequences are an increase of net erosion trends on tidal flats, and a decrease of light penetration in the water column. In this context, this study focuses on spatio-temporal analysis of seagrass decline in relation with morphological and hydrodynamical changes in the Bay. Historical bathymetric charts and maps of Zostera beds extent were co-analysed....
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00443/55447/56967.pdf
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Surveillance écologique du centre nucléaire de production d'électricité du Blayais. Année 2018 ArchiMer
Rumebe, Myriam; Auby, Isabelle; Blanchet, Hugues; Fouet, Marie; Gouriou, Laure; Hervio Heath, Dominique; Sautour, Benoit; Savoye, Nicolas; Sottolichio, Aldo.
Monitoring n° 41 of the Blayais nuclear power plant takes into account studies conducted between April and November 2018. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Microbiology; Benthic macrofauna.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00505/61660/65576.pdf
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Surveillance Ecologique du site du Blayais, année 2010 ArchiMer
Quintin, Jean-yves; Etcheber, Henri; Sottolichio, Aldo; Oggian, Georges; Mallet, Céline; Roux Ducept, Alexandra; Sautour, Benoit; Parra, René; Bachelet, Guy; Leconte, Michel.
L'étude de surveillance n° 33 du site électronucléaire du BLAYAIS (département de la Gironde) concerne la période de avril à novembre 2010. Les domaines pélagique et benthique sont étudiés (physico-chimie, bathymétrie, hydrobiologie, bactériologie, zooplancton, macrofaune benthique).
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00062/17292/14805.pdf
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Surveillance Ecologique du site du Blayais - Année 2011 ArchiMer
Quintin, Jean-yves; Etcheber, Henri; Sottolichio, Aldo; Oggian, Georges; Derriennic, Herve; Mallet, Céline; Roux Ducept, Alexandra; Sautour, Benoît; Parra, René; Bachelet, Guy; Leconte, Michel.
Monitoring n° 34 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2011. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique.; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Benthic macrofauna.; Microbiology.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00333/44415/44090.pdf
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Surveillance écologique du site du Blayais - année 2012 ArchiMer
Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Hervé; Schmidt, Sabine; Mallet, Céline; Roux Ducept, Alexandra; Sautour, Benoît; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 35 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2012. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Estuaire de la Gironde; Surveillance; Pelagos; Physico chimie; Bathymétrie; Hydrologie; Microbiologie; Zooplancton; Macrofaune benthique; Nuclear power plant; Gironde estuary; Monitoring; Pelagos; Physico chemistry; Bathymetry; Hydrology; Microbiology; Zooplankton; Benthic macrofauna.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00141/25181/23287.pdf
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Surveillance Ecologique du site du Blayais - année 2013 ArchiMer
Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Schmidt, Sabine; Mallet, Céline; Agion, Tony; Sautour, Benoit; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 36 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2013. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire – Estuaire de la Gironde – Surveillance; Pelagos; Physico chimie – Bathymétrie; Hydrologie; Microbiologie – Zooplancton – Macrofaune benthique.; Nuclear power plant – Gironde estuary – Monitoring; Pelagos; Physico chemistry – Bathymetry; Hydrology – Microbiology; Zooplankton – Benthic macrofauna.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00242/35306/33825.pdf
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Surveillance Ecologique du site du Blayais - Année 2014 ArchiMer
Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Schmidt, Sabine; Doremus, Sandrine; Agion, Tony; Hervio Heath, Dominique; Sautour, Benoît; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 37 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2014. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Zooplancton; Macrofaune benthique.; Bathymétrie; Estuaire de la Gironde; Surveillance; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Benthic macrofauna.; Bathymetry; Microbiology; Gironde estuary; Monitoring.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00333/44424/44088.pdf
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Surveillance Ecologique du site du Blayais - Année 2015 ArchiMer
Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Doremus, Sandrine; Agion, Tony; Peset, Sébastien; Hervio Heath, Dominique; Sautour, Benoit; Parra, René; Nowaczyck, Antoine; Bachelet, Guy; Leconte, Michel.
Monitoring n° 38 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2015. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique.; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Benthic macrofauna.; Microbiology.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00327/43800/43361.pdf
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Surveillance Ecologique du site du "Blayais" - année 2017 ArchiMer
Rumebe, Myriam; Auby, Isabelle; Hervio Heath, Dominique; Sottolichio, Aldo; Sautour, Benoit; Savoye, Nicolas; Derriennic, Hervé; Blanchet, Hugues; Leconte, Michel; Gouilleux, Benoit; Fouet, Marie; Agion, Tony.
Monitoring n° 40 of the Blayais nuclear power plant takes into account studies conducted between April and November 2017. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Benthic macrofauna; Gironde estuary; Monitoring; Bathymetry; Microbiology.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00477/58876/61407.pdf
Registros recuperados: 17
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