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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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| 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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| Ewald, M.; Belin, C.; Berger, P.; Etcheber, H.. |
| This preliminary work on the waters of the Gironde estuary demonstrates that the humic substances can be identified by spectrofluorimetry, either in a dissolved state (direct measurement) or in a particulate state after chemical extraction. These humic substances from the Gironde estuary show fluorescence spectra typical of a terrigenous material, compared to those obtained with an indigenous marine (deep water sediments from the Orgon IV expedition). |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/publication-5967.pdf |
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