Consulta: creatorFacets:"Leveau, M"
Registros recuperados: 5
Data/hora: 08/06/2024 11:50:57

Fronts hydrologiques au large des côtes françaises : Les sites-ateliers de programme Frontal
Provedor de dados: 5
Autores: Sournia, A; Brylinski, Jm; Dallot, S; Lecorre, P; Leveau, M; Prieur, L; Froget, C.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00103/21413/18990.pdf

Variabilité hydrologique et biologique du golfe du Lion. I. Transports en azote et productivité potentielle
Provedor de dados: 5
Autores: Conan, P; Pujo-pay, M; Raimbault, P; Leveau, M.
A monthly time-series of the seasonal evolution of the North Mediterranean Current (NMC) and of nitrogen flux across a transect (5 degrees 12'5 E between 43 degrees 10'N and 42 degrees 50'N) at the entrance of the Gulf of Lions was carried out over two years. The NMC exhibited two distinct structures: a winter structure (from November to May) characterised by strong mesoscale and interannual variations in which the current was 20 to 30 km width, about 400 m depth and velocity scaled between 5 and more than 40 cm s(-1); and a summer structure (from May to November) which was less sensitive to mesoscale variations but showing large interannual variability. The current was located more offshore, was wider and shallower than the one in winter and velocity...
Tipo: Text
Palavras-chave: Hydrologie; Variabilité à méso-échelle; Azote; Flux de matière; Bilan; Hydrology; Mesoscale variability; Nitrogen; Flux; Budget.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43638/43249.pdf

Effects of petroleum biodegradation products on phytoplankton growth.
Provedor de dados: 5
Autores: Goutx, H; Berland, B; Leveau, M; Bertrand, J.
The effects of products resulting from petroleum biodegradation in continuous culture, have been studied on the growth of two marine algae. Sugars, lipids and amino acids are the main components resulting from petroleum degradation in the bacteria used medium. Their concentrations are respectively 600 mg.l super(-1), 46 mg.l super(-1) and 74.2 mu M.l super(-1). The algae growth is inhibited when products are enough concentrated; it is stimulated by low concentration. Among these products, lipids are more toxic than others. The two species show different sensitivity towards the used medium. Prorocentrum micans growth is more inhibited than that of Phaeodactylum tricornutum .
Tipo: Text
Palavras-chave: Bacteria; Phytoplankton; Toxicity; Oil pollution; Crude oil; Biodegradation.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1017.pdf

Le néphéloïde benthique au large du Rhône. Transferts particulaires à l'interface continent-océan
Provedor de dados: 5
Autores: Naudin, Jj; Cauwet, G; Leveau, M; Lochet, F; Pauc, H; Romano, Jc; Sempere, R.
Particulate matter from the bottom nepheloid layer, off the Rhone river mouth was sampled with a newly-designed frame code-named SYMPHY. Several spreading phases of the Rhodanian suspensions on the continental shelf were evidenced by currentmeter records, particulate matter analyses, CTD and nephelometric measurements. These data permitted the study of the mechanisms which control the aging of the suspensions during their transfer to a sea with very small amplitude tides. The bottom nepheloid layer can be defined as a vertical concentration gradient resulting from an equilibrium between the horizontal (Rhodanian inputs) and the vertical (surface nepheloid layer) components of the particulate flux. The variability of this equilibrium, controlled by...
Tipo: Text
Palavras-chave: BOTTOM NEPHELOID LAYER; PARTICULATE MATTER; CURRENT MEASUREMENTS; HYDROLOGY.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00101/21230/18847.pdf

Variabilité hydrologique et biologique du golfe du Lion. II. Productivité sur le bord interne du courant
Provedor de dados: 5
Autores: Conan, P; Pujo-pay, M; Raimbault, P; Leveau, M.
An estimation of the annual productivity in the Gulf of Lions has been made in the 0-100 m layer using a Let-Go system, with monthly measurements at a fixed station. A value of 140 to 150 g m(-2) a(-1) of C is found, of which around 75 % occurs in the upper 50 m. The seasonal production is described according to three distinct patterns during the two hydrological seasons: (1) variable production in winter; (2) surface bloom in late winter; (3) homogeneous and mean production in summer with a clear Deep Chlorophyll Maximum. The hydrological winter phase represented 60 % of total annual production. The seasonal duality of the hydrodynamic system and the mesoscale variations of the Northern Mediterranean Current account for the variability and the evolution...
Tipo: Text
Palavras-chave: Production primaire; Bilan; Nitrate; Chlorophylle; Cycle saisonnier; Primary production; Budget; Nitrate; Chlorophyll; Seasonal cycle.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43639/43248.pdf