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| Registros recuperados: 23 | |
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| Proença, Barbara; Romuald, Marine; Auby, Isabelle; Ganthy, Florian; Sottolichio, Aldo; Michalet, Richard. |
| Ecosystem engineering effects of dominant species on habitats and consequently on other species are likely to propagate through time at longer distance than the close neighbourhood. Such effects are important to disentangle from short-term biotic effects, especially in biological invasions, as engineering can explain changes in invasion rates over the course of the invasion. We assessed the contribution and spatial dynamics of ecosystem engineering effects of a strong invader, the cordgrass Spartina anglica, on Zostera noltei, a foundation seagrass species of muddy intertidal systems in Europe. Z. noltei transplants were grown at different positions along transects crossing intact S. anglica patches, cut patches and nearby bare sediment on tidal flats in... |
| Tipo: Text |
Palavras-chave: Biological invasion; Competition; Ecosystem engineer; Spartina anglica; Zostera noltei. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00507/61875/67507.pdf |
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| 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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| 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 |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00312/42335/41666.pdf |
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| 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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| Fuentes-cid, A.; Chauvet, E.; Etcheber, H.; De-oliveira, E.; Sottolichio, Aldo; Schmidt, S.. |
| The rates of decomposition of oak (Quercus robur) leaves have been examined using litter bags in a very high turbidity macrotidal estuary, the Gironde Estuary (S.W. France). The first experiments show a marked decrease in the decomposition rate of oak leaves at the water-sediment interface (mud-contact: anoxic conditions, reduced physical fragmentation) in comparison to the water column. The results point out the impact of hydrodynamic conditions on leaf litter degradation in such fluvio-estuarine systems. Regarding the aquatic-terrestrial linkage, our observations suggest direct changes in leaf decomposition kinetics and then, a potential delay on the recycling and transport processes of coarse particulate organic matter, especially in a context of... |
| Tipo: Text |
Palavras-chave: Decomposition kinetics; Coarse particulate organic matter; Macrotidal estuary. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00470/58187/60703.pdf |
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| Diaz, Melanie; Grasso, Florent; Le Hir, Pierre; Sottolichio, Aldo; Caillaud, Matthieu; Thouvenin, Benedicte. |
| Coastal environments are directly influenced by terrigenous inputs coming from rivers through estuaries. Quantifying the amount of nutrients and contaminants transported by sediments from continental areas to the sea is crucial for marine resources protection. However, the complexity of estuarine dynamics makes it difficult to quantify sediment fluxes from field measurements alone and requires numerical modeling. Thus, using a realistic 3D hydrodynamic and sediment transport model, this study aims at evaluating the influence of model empirical parameters on sediment fluxes and estimating uncertainties on mud and sand transfers at a macrotidal estuary mouth. A sensitivity analysis, considering changes in sediment transport parameters, revealed that the... |
| Tipo: Text |
Palavras-chave: Sensitivity analysis; Sediment fluxes; Numerical modeling; Mud; Sand; Gironde Estuary. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00617/72897/71906.pdf |
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| 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 |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00033/14466/11766.pdf |
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| Lamarque, Bastien; Deflandre, Bruno; Galindo Dalto, Adriana; Schmidt, Sabine; Romero-ramirez, Alicia; Garabetian, Frédéric; Dubosq, Nicolas; Diaz, Melanie; Grasso, Florent; Sottolichio, Aldo; Bernard, Guillaume; Gillet, Hervé; Cordier, Marie-ange; Poirier, Dominique; Lebleu, Pascal; Derriennic, Hervé; Danilo, Martin; Murilo Barboza Tenório, Márcio; Grémare, Antoine. |
| The spatial distributions of (1) surface sediment characteristics (D0.5, Sediment Surface Area (SSA), Particulate Organic Carbon (POC), Chlorophyll-a (Chl-a), Phaeophytin-a (Phaeo-a), Total and Enzymatically Hydrolyzable Amino Acids (THAA, EHAA), δ13C) and (2) sediment profile image (apparent Redox Potential Discontinuity (aRPD), numbers and depths of biological traces) characteristics were quantified based on the sampling of 32 stations located within the West Gironde Mud Patch (Bay of Biscay, NE Atlantic) in view of (1) assessing the spatial structuration of a temperate river-dominated ocean margin located in a high-energy area, (2) disentangling the impacts of hydrodynamics and bottom trawling on this structuration, and (3) comparing the West Gironde... |
| Tipo: Text |
Palavras-chave: RiOMar; Surface sediment; Spatial distribution; Sedimentary organics; Bioturbation. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00681/79336/81848.pdf |
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| 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 |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00443/55447/56967.pdf |
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| 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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| 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 |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00062/17292/14805.pdf |
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| 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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| 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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| 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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| 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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| Registros recuperados: 23 | |
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