Showing results 61 to 80 of 90
 Trophic relationships within intertidal communities of the Brittany coast: a stable carbon isotope analysisDauby, Patrick  ; ; Bouquegneau, Jean-Marie in Journal of Coastal Research (1998), 14 Detailed reference viewed: 5 (1 ULg) Feeding of the sparid fish Sarpa salpa in a seagrass ecosystem: Diet and carbon flux; Lepoint, Gilles ; Dauby, Patrick et alin Marine Ecology (1997), 18(4), 289-297 In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ... [more ▼] In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ratios were measured in fish muscle and potential food sources (algae, P. oceanica leaf and its epiphytes) to determine their relative contribution to the fish diet. S. salpa has an age-related mixed diet: juveniles are plankton feeders, young, sub-adults and adults are herbivorous, and, the older the individuals, the higher the relative contribution of P. oceanica to the diet. Our results and former studies of carbon stocks and fluxes in the P. oceanica bed of Revellata Bay have enabled an estimation of the general impact of S. salpa grazing on infralittoral communities: the studied species consumes 24 g C.m-2.a(-1) from P. oceanica leaf, 4.8 from epiphytes and 13 from epilithic algae. The fish net production and biomass turnover in that zone have been estimated to be 1.2 g C.m(-2).a(-1) and 1.5 a(-1), respectively. [less ▲] Detailed reference viewed: 83 (6 ULg)A gas chromatographic separation for the H and C stable isotope ratio determination of coal compounds; Bouquegneau, Jean-Marie ; et alin Analytical Chemistry (1997), 69(11), 2030-2034 A new, completely automated gas chromatography technique has been developed to separate the different gaseous compounds produced during underground coal gasification for their C-13/C-12 and D/H isotope ... [more ▼] A new, completely automated gas chromatography technique has been developed to separate the different gaseous compounds produced during underground coal gasification for their C-13/C-12 and D/H isotope ratio measurements, ?he technique was designed for separation and collection of Hz, CO, CO2, H2O, H2S, CH4, and heavier hydrocarbons. These gaseous compounds are perfectly separated by the gas-phase chromatograph and quantitatively sent to seven combustion and collection lines. H-2, CO, CH4, and heavier hydrocarbons are quantitatively oxidized to CO2 and/or H2O. The isotopic analyses are performed by the sealed-tube method, The zinc method is used for reduction of both water and H2S to hydrogen for D/H analysis, Including all preparation steps, the reproducibility of isotope abundance values, for a quantity higher than or equal to 0.1 mt of individual components in a mixture (5 mt of gases being initially injected in the gas chromatograph), is +/-0.1 parts per thousand for delta(13)C(PDB) and +/-6 parts per thousand for delta(13)C(PDB) and +/-6 parts per thousand for delta(SMOW). [less ▲] Detailed reference viewed: 25 (0 ULg)Stable isotope studies: a remarkable tool in delianating organic matter pathways between pelagic and benthic realms. In memoriam Fiorentina Mosora; Dauby, Patrick in Bulletin de la Société Royale des Sciences de Liège (1996), 65 Detailed reference viewed: 22 (0 ULg)Distribution of inorganic carbon and related parameters in surface waters of the English Channel during spring 1994; ; Biondo, Renzo et alin Journal of Marine Systems (1996), 7 Detailed reference viewed: 6 (1 ULg)Distribution of surface water partial CO2 pressure in the English Channel and in the Southern Bight of the North Sea; ; Canon, Christine et alin Continental Shelf Research (1996), 16 Detailed reference viewed: 5 (0 ULg)Particle fluxes over a Mediterranean seagrass bed: a one-year sediment trap experimentDauby, Patrick ; ; et alin Marine Ecology. Progress Series (1995), 126 Detailed reference viewed: 10 (4 ULg)A delta 13C study of the feeding habits in four Mediterranean Leptomysis species (Crustacea: Mysidacea)Dauby, Patrick in Marine Ecology (1995), 16 Detailed reference viewed: 4 (1 ULg)Variations temporelles de la phénologie et de la composition biochimique de la phanérogame marine Posidonia oceanica en baie de CalviGobert, Sylvie ; ; Dauby, Patrick et alin Bulletin de la Société Royale des Sciences de Liège (1995), 64 Detailed reference viewed: 40 (5 ULg)SEM control on the effect of different techniques used to remove epiphytes from seagrassesDauby, Patrick ; Poulicek, Mathieu in Aquatic Botany (1995), 52 Detailed reference viewed: 15 (1 ULg)Elements stocks and fluxes in the P.oceanica ecosystem of the MediterraneanBouquegneau, Jean-Marie ; Dauby, Patrick ; et alReport (1994) Detailed reference viewed: 5 (2 ULg) Distribution of POC, PON and particulate Al, Cd, Cr, Cu, Pb, Ti, Zn and deltaC13 in the English Channel and adjacent areasDauby, Patrick ; ; Gobert, Sylvie et alin Oceanologica Acta (1994), 17(6), 643-657 Detailed reference viewed: 46 (6 ULg)Métaux lourds et isotopes stables du carbone dans la matière particulaire: distribution sur le plateau continental nord-ouest européenDauby, Patrick ; ; et alin Bulletin de la Société Royale des Sciences de Liège (1994), 63 Detailed reference viewed: 8 (0 ULg)Evolution of shoot density of the Posidonia seagrass bed of Calvi Bay (Corsica); ; et al in Vie et Milieu (1994), 44 Detailed reference viewed: 24 (3 ULg)Dynamique du carbone inorganique des eaux de surface dans l'embouchure de l'Escaut; Biondo, Renzo ; Bouquegneau, Jean-Marie et alin Bulletin de la Société Royale des Sciences de Liège (1994), 61 Detailed reference viewed: 10 (6 ULg)La matière en suspension de la couche de surface du plateau continental nord-ouest européen. II. Teneur en métaux lourds et transfert dans la chaîne trophiqueBouquegneau, Jean-Marie ; Gobert, Sylvie ; et alin Bulletin de la Société Royale des Sciences de Liège (1992), 61 Samples of suspended matter (MS) from the North Sea have been analysed for its heavy metal content. Unexpected high levels of copper have been recorded. The Scheldt Estuary reveals to be an important ... [more ▼] Samples of suspended matter (MS) from the North Sea have been analysed for its heavy metal content. Unexpected high levels of copper have been recorded. The Scheldt Estuary reveals to be an important source of zinc, lead and cadmium for the sea. The transfer of metals from the MS to mussels is low. [less ▲] Detailed reference viewed: 6 (3 ULg)La matière en suspension de la couche de surface du plateau continental nord-ouest européen. I. Distribution spatiale de la biomasse et du rapport 13C/12CDauby, Patrick ; ; et alin Bulletin de la Société Royale des Sciences de Liège (1992), 61 Detailed reference viewed: 5 (1 ULg)The stable carbon isotope ratios in benthic food webs of the gulf of Calvi, CorsicaDauby, Patrick in Continental Shelf Research (1989), 9 Detailed reference viewed: 11 (4 ULg)Analyse à l'aide des isotopes stables du carbone des sources de nutrition des détritivores et suspensivores benthiquesDauby, Patrick ; in Bulletin de la Société Royale des Sciences de Liège (1988), 57 Detailed reference viewed: 5 (1 ULg)Origine exogène de la chitine décelée chez les SpongiairesDauby, Patrick ; in Cahiers de Biologie Marine (1987), 28 Detailed reference viewed: 9 (0 ULg) |
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