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Registros recuperados: 280
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2 : Environnement, matière organique particulaire et production phyto-planctonique IRD
Charpy, Loïc; Bonnet, Sylvain; Le Borgne, Robert.
Tipo: Text Palavras-chave: LAGON; MATIERE ORGANIQUE PARTICULEE; CHLOROPHYLLE; PHEOPHYTINE; ATP; PHYTOPLANCTON; CARBONE; ANALYSE DE RESULTAT.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:23211
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A 2-year survey of phytoplankon in the Marne reservoir (France) : a case study to validate the use of an in situ spectrofluorimeter by comparison with algal taxonomy and chlorophyll a measurements Inra
Rolland, A.; RIMET, F.; Jacquet, S..
Tipo: Journal Article Palavras-chave: PHYTOPLANKTON; CHLOROPHYLLE A; TAXONOMY; BBE FLUOROPROBE MONITORING; RESERVOIR; TAXONOMIE; PHYTOPLANCTON; CHLOROPHYLLE A; SONDE BBE FLUOROPROBE; MONITORING; RESERVOIR.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20107d672eea&uri=/notices/prodinra1/2011/04/
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A model of the relationship between light and primary production in an atoll lagoon IRD
Charpy, Loïc; Charpy Roubaud, Claude.
The Tikehau atoll (Tuamotu Archipelago, French Polynesia) is located at 14°S 148°W. Phytoplankton and sand microalgae are the most important primary producers of the lagoon. They were studied for 4 years. The relationship between light energy and lagoonal primary production was measured by using the 14C method for phytoplankton and O2 method for phytobenthos. Incubations, carried out #in situ$, were made at different depths and light exposition times. Irradiance was hight and 17% of the light energy measured at the surface reached 25 m (lagoon average depth). Maxima of phytoplankton and phytobenthos productions occured at low depths; there was therefore no photoinhibition of photosynthesis. Correlations between light energy and primary production were...
Tipo: Text Palavras-chave: ATOLL; PHYTOPLANCTON; PHYTOBENTHOS; LUMIERE; PRODUCTION PRIMAIRE; RELATION INTERSPECIFIQUE; MODELE.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:34225
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Abnormal bloom of phytoplankton around 10°N in the western Pacific during the 1982-83 ENSO IRD
Dandonneau, Yves.
The chlorophyll concentration at the surface of the tropical Pacific has been monitored through the 1982-83 ENSO, owing to the SURTROPAC ships of opportunity network. The event was characterized by a decrease in chlorophyll concentrations at the equator, where a belt of relatively rich water however persisted. The most striking anomaly was observed in the western Pacific between 5°N and 15°N. In this region, chlorophyll at the surface is generally less than O.O7 mg m-3, caused by a mixed layer exhausted in nutrients and by strong density gradient in the thermocline. From october 1982 to march 1983, higher concentrations up to 0.70 mg m-3 have been recorded by the network. This is consistent with the shallowing of the thermocline which characterizes all...
Tipo: Text Palavras-chave: PHYTOPLANCTON; ANOMALIE; CONCENTRATION; ENSO; 1982 1983.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:30264
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Actes de l'atelier sur la mangrove de Ngoc Hien, province de Minh Hai IRD
Tipo: Text Palavras-chave: ECOSYSTEME; MANGROVE; SEDIMENTOLOGIE; PALYNOLOGIE; STRATIGRAPHIE; GEOCHIMIE; GEOMORPHOLOGIE; MORPHOPEDOLOGIE; HYDROLOGIE; PHYTOPLANCTON; UTILISATION DU SOL; TELEDETECTION SPATIALE; AQUACULTURE; CREVETTE; SYSTEME DE PRODUCTION; SYSTEME D'INFORMATION GEOGRAPHIQUE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:010007332
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Activité photosynthétique du phytoplancton du lac Tchad IRD
Lemoalle, Jacques.
Tipo: Text Palavras-chave: PHYTOPLANCTON; PRODUCTION JOURNALIERE; FACTEUR PHYSICOCHIMIQUE; ACTIVITE PHOTOSYNTHETIQUE.
Ano: 1979 URL: http://www.documentation.ird.fr/hor/fdi:03838
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Algal blooms in high turbidity, a result of the conflicting consequences of turbulence on nutrient cycling in a shallow water estuary IRD
Fichez, Renaud; Jickells, T.D.; Edmunds, H.M..
Le devenir des nutrients inorganiques dissous, de la matière organique particulaire et des chloropigments a été étudié dans un estuaire peu profond (Great Ouse, Angleterre) de mars 1990 à janvier 1991). Des blooms phytoplanctoniques caractérisés par des concentrations en chlorophylle a supérieures à 100 ug 1-1 et un comportement non conservatif des nutrients sont observés au début du printemps et en été. Cette étude montre que malgré la très faible épaisseur de la zone euphotique les processus de mélange verticaux autorisent le développement phytoplanctonique dans les estuaires présentant une forte turbidité et de faibles profondeurs; les mécanismes mis en jeu sont discutés. (Résumé d'auteur)
Tipo: Text Palavras-chave: ESTUAIRE; GEOCHIMIE; SEL NUTRITIF; MATIERE ORGANIQUE PARTICULEE; CHLOROPHYLLE; EUTROPHISATION; PHYTOPLANCTON; BLOOM ALGAL.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:37961
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Algues des eaux natronées du Kanem (Tchad) : 2e partie IRD
Iltis, André.
Tipo: Text Palavras-chave: PHYTOPLANCTON; DIATOMEE; INVENTAIRE; FACTEUR ABIOTIQUE; SALINITE; LAC; MARE; EAU DOUCE; CYANOPHYCEA; CHLOROPHYCEA.
Ano: 1973 URL: http://www.documentation.ird.fr/hor/fdi:18181
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Algues des eaux natronées du Kanem (Tchad) : première partie IRD
Iltis, André.
Tipo: Text Palavras-chave: PHYTOPLANCTON; INVENTAIRE; REPARTITION GEOGRAPHIQUE; LAC; MARE; EAU DOUCE.
Ano: 1972 URL: http://www.documentation.ird.fr/hor/fdi:18177
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Algues nouvelles des mares du Kanem (Tchad) IRD
Iltis, André.
Tipo: Text Palavras-chave: PHYTOPLANCTON; ALGUE D'EAU DOUCE; ESPECE NOUVELLE; TAXONOMIE; ANATOMIE VEGETALE; CHLOROPHYCEAE; SCENEDESMUS BOURRELLYI N. SP.; SCENEDESMUS RETROSPINOSUS N. SP.; DIATOMOPHYCEAE; NAVICULA KANEMI N. SP.; SURIRELLA ACANTHOPHORA N. SP..
Ano: 1971 URL: http://www.documentation.ird.fr/hor/fdi:04703
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Aménagement hydro-électrique du Garafiri sur le Konkouré : étude de l'impact du barrage de Garafiri sur l'estuaire et le bassin versant du Konkouré : rapport final : 1. Présentation générale, écoulement des eaux continentales et transports solides, qualité des eaux, fonctionnement hydrodynamique estuarien, évolution géomorphologique, évolution sédimentaire ; 2. Suivi des impacts socio-économiques sur la zone estuarienne, vie aquatique, inventaire et description des annexes sur IRD
Tipo: Text Palavras-chave: AMENAGEMENT HYDROELECTRIQUE; BARRAGE; IMPACT SUR L'ENVIRONNEMENT; ESTUAIRE; BASSIN VERSANT; ECOULEMENT; EAU CONTINENTALE; TRANSPORT SOLIDE; MATIERE EN SUSPENSION; SEDIMENT; DEBIT; QUALITE DE L'EAU; PROPRIETE PHYSICOCHIMIQUE; HYDRODYNAMIQUE; GEOMORPHOLOGIE; ICHTYOLOGIE; POISSON D'EAU DOUCE; BENTHOS; ZOOPLANCTON; PHYTOPLANCTON; STRUCTURE DU PEUPLEMENT; IMPACT SOCIOECONOMIQUE; PRODUCTION AGRICOLE; RIZICULTURE; MODE DE VIE; REVENU.
Ano: 2003 URL: http://www.documentation.ird.fr/hor/fdi:010031013
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Amino acid uptake by a natural population of Oscillatoria rubescens in relation to uptake by bacterioplankton IRD
Feuillade, M.; Bohatier, j.; Bourdier, G.; Dufour, Philippe; Feuillade, J.; Krupka, H..
Des fractionnements par taille et des autoradiographies au microscope électronique ont été utilisés pour déterminer si, dans le lac eutrophe de Nantua, l'espèce d'algue dominante #Oscillatoria rubescens$ D.C., peut entrer en compétition avec les bactéries vis-à-vis des acides aminés en solution. Les fractions supérieures à 12 (microns) où 97% des biovolumes étaient liés aux oscillaires, ont assimilés, en moyenne 64% des acides aminés 14C introduits. L'autoradiographie en section ultra mince a confirmé l'incorporation des acides aminés dans les cellules d'oscillaires. Les résultats suggèrent qu'#Oscillatoria rubescens$ peut commencer les bactéries pour l'assimilation des acides aminés dissous aux concentrations naturelles. (Résumé d'auteur)
Tipo: Text Palavras-chave: PHYTOPLANCTON; COMPETITION INTERSPECIFIQUE; ACIDE AMINE; BACTERIOPLANCTON; HETEROTROPHIE.
Ano: 1988 URL: http://www.documentation.ird.fr/hor/fdi:26444
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Ammonium formation in Cape Timiris (Mauritania) upwelling IRD
Le Borgne, Robert.
Tipo: Text Palavras-chave: ANALYSE QUANTITATIVE; VARIATION SPATIALE; VARIATION JOURNALIERE; AMMONIUM; MATIERE ORGANIQUE DISSOUTE; AZOTE; CHLOROPHYLLE; EXCRETION; PHYTOPLANCTON; ZOOPLANCTON; UPWELLING; ACTIVITE HETEROTROPHE.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:01133
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An empirical approach to the island mass effect in the south tropical Pacific based on sea surface chlorophyll concentrations IRD
Dandonneau, Yves; Charpy, Loïc.
Tipo: Text Palavras-chave: CHLOROPHYLLE; LAGON; BIOMASSE; UPWELLING; EAU DE SURFACE; PRODUCTION PRIMAIRE; SEL NUTRITIF; DISTRIBUTION SPATIALE; PHYTOPLANCTON; EFFET D'ILE; ZONE OLIGOTROPHE.
Ano: 1985 URL: http://www.documentation.ird.fr/hor/fdi:010025866
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Application de l’indice de composition pigmentaire ICBC pour Manche-Atlantique aux masses d’eau méditerranéennes ArchiMer
Lampert, Luis; Hernandez Farinas, Tania.
Suite aux  études concernant la mise en place d’un indice de composition pigmentaire dans les eaux de Manche-Atlantique (Lampert, 2018) et en Méditerranée (Goffart, 2018), il a été convenu de procéder à un échange de données pour ces deux façades afin d’évaluer le potentiel de ces deux indicateurs sur les façades pour lesquelles ils n’ont pas été conçus. Nous avons donc, appliqué l’indice de composition ICBC aux données obtenues entre 2009 et 2017 en Méditerranée (ICBCmed), défini une grille de classement pour l’EQR IC et finalement classé les masses d’eau afin d’inclure l’indice de composition dans l’indicateur phytoplancton de Méditerranée. Cet ICBCmed a été calculé pour les 15 points échantillonnés. Le résultat du classement est cohérent avec les...
Tipo: Text Palavras-chave: MEDITERRANEE; DCE; HPLC; PHYTOPLANCTON; INDICE DE COMPOSITION; ICBC.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00469/58111/60531.pdf
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Application des données Landsat à l'estimation de la production du phytoplancton dans le lac Tchad IRD
Lemoalle, Jacques.
Tipo: Text Palavras-chave: PHYTOPLANCTON; TELEDETECTION; LUMINANCE; ACTIVITE PHOTOSYNTHETIQUE; IMAGE LANDSAT.
Ano: 1979 URL: http://www.documentation.ird.fr/hor/fdi:18262
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Aspecto cuantitativo y poblaciones IRD
Iltis, André.
Tipo: Text Palavras-chave: LAC; PHYTOPLANCTON; ANALYSE QUANTITATIVE; BIOMASSE; DISTRIBUTION SPATIALE; HAUT PLATEAU.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:36619
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Aspects principaux des variations du phytoplancton sur le plateau continental ivoirien IRD
Dandonneau, Yves.
Tipo: Text Palavras-chave: PHYTOPLANCTON; ANALYSE QUANTITATIVE; ANALYSE QUALITATIVE; VARIATION SAISONNIERE; REPARTITION GEOGRAPHIQUE; PLATEAU CONTINENTAL; PRODUCTION PRIMAIRE; ESTIMATION.
Ano: 1972 URL: http://www.documentation.ird.fr/hor/fdi:32168
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Available algal biomass in tropical brackish water artificial habitats IRD
Guiral, Daniel; Konan-Brou, A.A..
Experiments were conducted in february 1990 at the Layo aquaculture station located in Ebrié Lagoon, Ivory Coast, to find a reliable technique for the estimation of algal biomass and to understand the process that leads to a high tertiary productivity. Periphyton, growing on bamboo, was sampled at different settlement levels in an "acadja-enclos" at 200 m off the lagoon bank. "Acadja-enclos" is an extensive aquaculture system where #Sarotherodon melanotheron$ (#Cichlidae$), a herbivorous fish, occurs mostly. Organic charge and periphytic concentrations (chl a, pheopigment, total pigments) were determined on each sample (from different locations). Specific microalgae composition and light intensity were also estimated. The periphytic community within the...
Tipo: Text Palavras-chave: LAGUNE; MILIEU SAUMATRE; PHYTOPLANCTON; BIOMASSE ALGALE; ANALYSE QUANTITATIVE; ENVIRONNEMENT; PISCICULTURE; HABITAT ARTIFICIEL; CAGE ENCLOS.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:40369
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Bassin tchadien = Chad basin IRD
Lévêque, Christian (coord.).
Tipo: Text Palavras-chave: LAC; LAC SALE; PLAINE INONDABLE; RECHERCHE SCIENTIFIQUE; GEOLOGIE; HYDROGEOLOGIE; PHYTOPLANCTON; FAUNE; PECHE; BIBLIOGRAPHIE.
Ano: 1988 URL: http://www.documentation.ird.fr/hor/fdi:40171
Registros recuperados: 280
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