Consulta: subjectFacets:"Benthic fluxes"
Registros recuperados: 3
Data/hora: 08/06/2024 15:43:02

Benthic metabolism over the emersion - Immersion alternation in sands colonized by the invasive Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Migne, Aline; Trigui, Rima Jihane; Davoult, Dominique; Desroy, Nicolas.
The effect of an invasive infaunal suspension-feeding bivalve, the Manila clam Ruditapes philippinarum, on benthic inorganic carbon and nutrient fluxes was examined through in situ incubations. Measurements were performed in spring and summer on a tidal sandflat of the Rance estuary (south part of the Western English Channel) colonized by the Manila clam after its deliberate introduction in the 1990's. Benthic inorganic carbon fluxes were measured using light and dark benthic chambers both at emersion and immersion. Benthic nutrient fluxes were measured using dark benthic chambers at immersion. Inorganic carbon (IC) and ammonium sediment release under darkness at immersion reached 5.60 mmol m−2 h−1 and 441 μmol m−2 h−1 respectively for a clam density of...
Tipo: Text
Palavras-chave: Benthic fluxes; Benthos; Inorganic carbon; Nutrients; Suspension-feeding bivalve; Tidal flats; France; Western English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00412/52327/53100.pdf

Impact of the Phaeocystis globosa spring bloom on the intertidal benthic compartment in the eastern English Channel: A synthesis
Provedor de dados: 5
Autores: Spilmont, Nicolas; Denis, Lucie; Artigas, Luis Felipe; Caloin, Frederic; Courcot, Lucie; Creach, Anne; Desroy, Nicolas; Gevaert, Francois; Hacquebart, Pascal; Hubas, Cedric; Janquin, Marie-andree; Lemoine, Yves; Luczak, Christophe; Migne, Aline; Rauch, Mathieu; Davoult, Dominique.
From 1999 to 2005, studies carried out in the frame of regional and national French programs aimed to determine whether the Phaeocystis globosa bloom affected the intertidal benthic communities of the French coast of the eastern English Channel in terms of composition and/or functioning. Study sites were chosen to cover most of the typical shore types encountered on this coast (a rocky shore, an exposed sandy beach and a small estuary). Both the presence of active Phaeocystis cells and their degradation product (foam) did have a significant impact on the studied shores. The primary production and growth rates of the kelp Saccharina latissima decreased during the bloom because of a shortage of fight and nutrient for the macroalgae. On sandy sediments, the...
Tipo: Text
Palavras-chave: Macrozoobenthos; Bacteria; Saccharina latissima; Benthic fluxes; Phaeocystis globosa; Intertidal.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6142.pdf

Evidence for intense REE scavenging at cold seeps from the Niger Delta margin
Provedor de dados: 5
Autores: Bayon, Germain; Birot, Dominique; Ruffine, Livio; Caprais, Jean-claude; Ponzevera, Emmanuel; Bollinger, C.; Donval, Jean-pierre; Charlou, Jean-luc; Voisset, Michel; Grimaud, S.
For many trace elements, continental margins are the location of intense exchange processes between sediment and seawater, which control their distribution in the water column, but have yet to be fully understood. In this study, we have investigated the impact of fluid seepage at cold seeps on the marine cycle of neodymium. We determined dissolved and total dissolvable (TD) concentrations for REE and well-established tracers of fluid seepage (CH4, TDFe, TDMn), and Nd isotopic compositions in seawater samples collected above cold seeps and a reference site (i.e. away from any fluid venting area) from the Niger Delta margin. We also analyzed cold seep authigenic phases and various core-top sediment fractions (pore water, detrital component, easily leachable...
Tipo: Text
Palavras-chave: Rare earth elements; Neodymium isotopes; Seawater; Cold seeps; Fe-Mn oxyhydroxides; Benthic fluxes.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00066/17754/15571.pdf