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Registros recuperados: 33
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A simple and rapid device for measuring planktonic primary production by in situ sampling, and 14C injection and incubation IRD
Dandonneau, Yves; Le Bouteiller, Aubert.
A system (LET GO) is described that enables measurements of primary production at sea after #in situ$ incubation, with 14C being injected at depth immediately after enclosure of the sample. Each incubation cell, about 200 ml, is made of two transparent plexiglass cups facing each other. Mechanical energy to operate the system is provided by the tension of the nylon line between the drifting buoy, which holds the experimental equipment, and a weight at the bottom : when the line is strained, the two cups enclose the water sample, and the 14C is delivered by a syringe. Absence of metallic or rubber parts ensures that toxicity effects are minimized and that reliable results can be expected. Furthermore, #in situ$ incubations can start 1 or 2 min after arrival...
Tipo: Text Palavras-chave: PRODUCTION PRIMAIRE; APPAREIL DE MESURE; TECHNIQUE; ANALYSE DE DONNEES; INCUBATION; SYSTEME LET GO.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:39868
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Biomasse, excrétion et production du zooplancton - micronecton hauturier du golfe de Guinée : relations avec le phytoplancton et les particules IRD
Le Borgne, Robert; Herbland, Alain; Le Bouteiller, Aubert; Roger, Claude.
Tipo: Text Palavras-chave: BIOMASSE; EXCRETION; ACTIVITE BIOLOGIQUE; ZOOPLANCTON; MICRONECTON; MICROZOOPLANCTON; REPARTITION VERTICALE; VARIABILITE; RELATION TROPHIQUE; MESOPLANCTON; MACROZOOPLANCTON.
Ano: 1983 URL: http://www.documentation.ird.fr/hor/fdi:15481
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Campagne de l'"André Nizery", Niz 03-8/70 du 19 au 28 août 1970 : compte-rendu de sortie IRD
Guillerm, Jean-Maurice; Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; OCEANOGRAPHIE PHYSIQUE; HYDROLOGIE MARINE; TEMPERATURE DE SURFACE; SALINITE; PHOSPHATE; TRANSPARENCE; VARIATION SPATIALE; COURANTOMETRIE; COURANT SUPERFICIEL.
Ano: 1970 URL: http://www.documentation.ird.fr/hor/fdi:04481
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Carbon fixation and productivity index in relation to chlorophyll and light in the Equatorial Atlantic Ocean IRD
Le Bouteiller, Aubert; Herbland, Alain.
Tipo: Text Palavras-chave: PRODUCTION PRIMAIRE; PRODUCTIVITE PRIMAIRE; CHLOROPHYLLE; LUMIERE; PROFIL VERTICAL.
Ano: 1984 URL: http://www.documentation.ird.fr/hor/fdi:19786
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Comparison of in-bottle measurements using 15N and 14C IRD
Le Bouteiller, Aubert.
Field date reported in the literature are used for making a direct comparison between primary production estimated by the 14C method and nitrogen uptake measured by the 15N method (nitrate, ammonium and at times, urea). C/N uptake ratio values vary widely, from less than 1 to more than 20 (at/at), without any evident relationship with environmental properties or experimental procedure. The mean uptake ratio calculated on the whole data set is found to be equal to 6.7 ( n = 99). The question arises whether such as C/N ratio may be considered as the assimilation ratio. For comparison purposes, the constituent ratio of phytoplankton assessed by the slopes of the regression lines relating carbon and nitrogen in particles has also been studied from the...
Tipo: Text Palavras-chave: PHYTOPLANCTON; PRODUCTION PRIMAIRE; MESURE; METHODE; C 14; TRACEUR RADIOACTIF; CN.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:39883
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Diel variation of chlorophyll a as evidence from a 13-day station in the equatorial Atlantic ocean IRD
Le Bouteiller, Aubert; Herbland, Alain.
Tipo: Text Palavras-chave: CHLOROPHYLLE; PHYTOPLANCTON; BIOMASSE; VARIATION TEMPORELLE; RYTHME NYCTHEMERAL; PROFIL VERTICAL.
Ano: 1982 URL: http://www.documentation.ird.fr/hor/fdi:03671
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Distribution of phytoplankton in the largest productive system of the world ocean : the Pacific Equatorial upwelling IRD
Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: PHYTOPLANCTON; PRODUCTION PRIMAIRE; BIOMASSE; PHOTOSYNTHESE; CHLOROPHYLLE; ABONDANCE; DISTRIBUTION SPATIALE; UPWELLING.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:39882
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Does the nutrient enrichment of the equatorial upwelling influence the size structure of phytoplancton in the Atlantic ocean ? IRD
Herbland, A.; Le Bouteiller, Aubert; Raimbault, P..
Une étude de la structure de la taille des particules contenant la chlorophylle a (Chla) recouvrant la majeure partie de l'Océan Atlantique équatorial de 5°N à 5°S, conduit à la conclusion que l'enrichissement saisonnier en sels nutritifs dans l'Atlantique équatorial oriental n'affecte pas de façon importante la distribution de la taille des producteurs primaires : 90 % de la Chla est en moyenne contenue dans des cellules inférieures à 10 microns. Dans l'upwelling côtier près de Dakar, et pour la même gamme de concentration en Chla, ce pourcentage est inférieur à 60; le pourcentage de Chla inférieur à 1 micron est le même dans le maximum profond situé au sommet de la nitracicline pendant la saison "chaude" et dans le maximum subsuperficiel de l'upwelling...
Tipo: Text Palavras-chave: CHLOROPHYLLE; PHYTOPLANCTON; UPWELLING; RELATION TROPHIQUE.
Ano: 1987 URL: http://www.documentation.ird.fr/hor/fdi:26660
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Dynamique du phytoplancton et matière organique particulaire dans la zone euphotique de l'Atlantique Equatorial IRD
Herbland, Alain; Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: PHYTOPLANCTON; CROISSANCE; MATIERE ORGANIQUE PARTICULEE; TEMPERATURE; NITRATE; CHLOROPHYLLE; PRODUCTION PRIMAIRE; ZONE EUPHOTIQUE.
Ano: 1983 URL: http://www.documentation.ird.fr/hor/fdi:010023168
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Effect of El Nino southern oscillation events on the distribution and abundance of phytoplankton in the Western Pacific Tropical Ocean along 165°E IRD
Blanchot, Jean; Rodier, Martine; Le Bouteiller, Aubert.
The distribution of physical and chemical parameters and their impact on the biomass and abundance of phytoplankton in the Western Pacific ocean were compared in two opposing situations : the El Nino Southern Oscillation (ENSO) event of 1987 and the no-ENSO period of 1988. During El Nino conditions (september 1987), maximum cell abundance was recorded at 10°S at the boundary between the South Equatorial current (SEC) and the South Equatorial countercurrent (SECC). In September 1988, after the return of non-ENSO conditions, a well-established Equatorial upwelling produced an increase in the surface layer nutrient supply over 7° of latitude. This in turn caused an increase in phytoplankton populations in the upper layer, with chlorophyll concentrations ......
Tipo: Text Palavras-chave: EL NINO; CONSEQUENCE ECOLOGIQUE; PHYTOPLANCTON; ABONDANCE; BIOMASSE; DISTRIBUTION SPATIALE; CYANOBACTERIE; MICROALGUE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:35686
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ENSO events and consequences on nutrient, planktonic biomass, and production in the western tropical pacific ocean IRD
Blanchot, Jean; Le Borgne, Robert; Le Bouteiller, Aubert; Rodier, Martine.
ENSO events change the hydrographical structures and the planktonic biomass and production particularly in the low latitude region of the Pacific ocean. We compare here the consequences of these variations at 165°E, in two opposite situations, i.e. during an ENSO event in september 1987 and during an non ENSO event in september 1988. Preliminary conclusions show : (i) for the nutrients in september 1987, a thick nutrient-depleted mixed layer (under detectable limits) along the transect, except at 10°S and 9°S and in september 1988, a wide upwelling between 5°S and 2°N with surface nitrate concentrations ranging between 0.3 and 2mM; (ii) for phytoplankton, the abundance of cyanobacteria (procaryotes) and microalgae (eucaryotes) shows large changes both in...
Tipo: Text Palavras-chave: CONSEQUENCE ECOLOGIQUE; PRODUCTION BIOLOGIQUE; SEL NUTRITIF; BIOMASSE; ZOOPLANCTON; PHYTOPLANCTON; ENSO; 1987 1988.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:30263
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Environmental control of nitrate and ammonium uptake by phytoplankton in the Equatorial Atlantic ocean IRD
Le Bouteiller, Aubert.
31 profils de production primaire (14C, 15NO3 ou 15NH4) furent obtenus en une position fixe à l'équateur (4°W). Dans les eaux riches en sels nutritifs, la production primaire totale et la consommation de nitrate varient l'une et l'autre en fonction directe de la biomasse chlorophyllienne. La consommation de NO3 couvre de 5 à 25 % des besoins azotés totaux. Le taux d'assimilation spécifique du NO3 est corrélé à la lumière et la température, et non à la teneur en nitrate. Dans la couche homogène oligotrophe, la production nouvelle est au maximun de 1,6 micromole m-3 h-1. La production nouvelle de l'ensemble de la couche euphotique varie de 1 à 5 mmole (NO3) m-2 . jour-1. Des expériences de fractionnement par taille montrent que le phytoplancton (inférieur) à...
Tipo: Text Palavras-chave: PHYTOPLANCTON; SEL NUTRITIF; LUMIERE; PRODUCTION NOUVELLE; PRODUCTION REGENEREE.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:25984
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Etude de l'hydrologie et du plancton du lagon d'Ouvéa (Iles Loyauté) en septembre 1992 : observations sur la macrofaune benthique IRD
Le Borgne, Robert; Le Bouteiller, Aubert; Rodier, Martine; Garrigue, Claire; Richer de Forges, Bertrand.
Tipo: Text Palavras-chave: LAGON; ANALYSE CHIMIQUE; OXYGENE DISSOUS; SEL NUTRITIF; MATIERE ORGANIQUE PARTICULEE; CHLOROPHYLLE; PIGMENT; ZOOPLANCTON; PHYTOPLANCTON; BIOMASSE; PRODUCTION PRIMAIRE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:39608
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Etude de l'influence des conditions hydrologiques sur la production pélagique dans la zone occidentale du Pacifique (Programme PROPPAC) IRD
Le Borgne, Robert; Le Bouteiller, Aubert; Radenac, Marie-Hélène.
Tipo: Text Palavras-chave: PRODUCTION PRIMAIRE; CHLOROPHYLLE; SEL NUTRITIF; BIOMASSE; VARIATION INTERANNUELLE; PHYTOPLANCTON; EL NINO.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:27421
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FLUPAC, a contribution to equatorial Pacific JGOFS (abstract) IRD
Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: COUCHE EUPHOTIQUE; PRODUCTION PRIMAIRE; PHOTOSYNTHESE; CARBONE; FLUX; PROGRAMME DE RECHERCHE; SURVEILLANCE; TELEDETECTION.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:39881
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Les richesses du désert IRD
Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: MILIEU MARIN; PHYTOPLANCTON; BIOMASSE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010006155
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Observations effectuées au Wharf de la CPC : rapport trimestriel janvier-février-mars 1971 IRD
Le Bouteiller, Aubert; Guillerm, Jean-Maurice (collab.); Borsetti, M.L. (collab.).
Tipo: Text Palavras-chave: STATION HYDROLOGIQUE; HYDROLOGIE MARINE; TEMPERATURE; SALINITE; OXYGENE DISSOUS; PHOSPHATE; PRODUCTION PRIMAIRE; CHLOROPHYLLE; COURANTOMETRIE; VARIATION SPATIALE; VARIATION MENSUELLE; CONDITION METEOROLOGIQUE.
Ano: 1971 URL: http://www.documentation.ird.fr/hor/fdi:16067
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Observations océanographiques côtières à Pointe-Noire (République Populaire du Congo) : année 1970 IRD
Guillerm, Jean-Maurice; Le Bouteiller, Aubert.
Tipo: Text Palavras-chave: OCEANOGRAPHIE PHYSIQUE; ZONE COTIERE; STATION HYDROLOGIQUE; HYDROLOGIE MARINE; METEOROLOGIE; PRECIPITATION; VARIATION MENSUELLE; TEMPERATURE DE SURFACE; SALINITE; OXYGENE DISSOUS; PHOSPHATE; PRODUCTION PRIMAIRE; CHLOROPHYLLE; MASSE D'EAU.
Ano: 1972 URL: http://www.documentation.ird.fr/hor/fdi:05442
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Rapport de la campagne PROPPAC 02 du N.O. "CORIOLIS" (27 mars - 27 avril 1988) IRD
Blanchot, Jean; Le Borgne, Robert; Le Bouteiller, Aubert; Radenac, Marie-Hélène.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; METEOROLOGIE; PRODUCTION PRIMAIRE; ZOOPLANCTON; SEL NUTRITIF.
Ano: 1988 URL: http://www.documentation.ird.fr/hor/fdi:25607
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Rapport de la campagne PROPPAC 03 du N.O. "Coriolis" : 11 septembre 11 octobre 1988 IRD
Blanchot, Jean; Le Borgne, Robert; Le Bouteiller, Aubert; Radenac, Marie-Hélène; Rodier, Martine.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; BIOLOGIE MARINE; HYDROLOGIE MARINE; PRODUCTION PRIMAIRE; ZOOPLANCTON; BIOMASSE.
Ano: 1988 URL: http://www.documentation.ird.fr/hor/fdi:26152
Registros recuperados: 33
Primeira ... 12 ... Última
 

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