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| Registros recuperados: 18 | |
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| Loisel, H.; Vantrepotte, V.; Norkvist, K.; Meriaux, Xavier; Kheireddine, M.; Ras, J.; Pujo-pay, M.; Combet, Y.; Leblanc, K.; Dall'Olmo, G.; Mauriac, R.; Dessailly, D.; Moutin, T.. |
| The variability of inherent optical properties is investigated in the ultra-oligotrophic waters of the Mediterranean Sea sampled during the BOUM experiment performed during early summer 2008. Bio-optical relationships found for ultra-oligotrophic waters of the three anticyclonic gyres sampled significantly depart from the mean standard relationships provided for the global ocean, confirming the peculiar character of these Mediterranean waters. These optical anomalies are diversely related to the specific biological and environmental conditions occurring in the studied ecosystem. Specifically, the surface specific phytoplankton absorption coefficient exhibits values lower than those expected from the general relationships mainly in relation with a high... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24403/22415.pdf |
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| Durrieu De Madron, Xavier; Ramondenc, S.; Berline, L.; Houpert, L.; Bosse, Anthony; Martini, S.; Guidi, L.; Conan, P.; Curtil, C.; Delsaut, N.; Kunesch, S.; Ghiglione, J. F.; Marsaleix, P.; Pujo-pay, M.; Severin, T.; Testor, P.; Tamburini, C.. |
| The Gulf of Lions in the northwestern Mediterranean is one of the few sites around the world ocean exhibiting deep open-ocean convection. Based on 6-year long (2009-2015) time series from a mooring in the convection region, shipborne measurements from repeated cruises, from 2012 to 2015, and glider measurements, we report evidence of bottom thick nepheloid layer formation, which is coincident with deep sediment resuspension induced by bottom-reaching convection events. This bottom nepheloid layer, which presents a maximum thickness of around 2000 m in the center of the convection region, probably results from the action of cyclonic eddies that are formed during the convection period and can persist within their core while they travel through the basin. The... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00368/47968/47992.pdf |
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| Crombet, Y.; Leblanc, K.; Queguiner, B.; Moutin, T.; Rimmelin, P.; Ras, J.; Claustre, H.; Leblond, N.; Oriol, L.; Pujo-pay, M.. |
| The silicon biogeochemical cycle has been studied in the Mediterranean Sea during late summer/early autumn 1999 and summer 2008. The distribution of nutrients, particulate carbon and silicon, fucoxanthin (Fuco), and total chlorophyll-a (TChl-a) were investigated along an eastward gradient of oligotrophy during two cruises (PROSOPE and BOUM) encompassing the entire Mediterranean Sea during the stratified period. At both seasons, surface waters were depleted in nutrients and the nutriclines gradually deepened towards the East, the phosphacline being the deepest in the easternmost Levantine basin. Following the nutriclines, parallel deep maxima of biogenic silica (DSM), fucoxanthin (DFM) and TChl-a (DCM) were evidenced during both seasons with maximal... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24393/22421.pdf |
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| Touratier, Franck; Guglielmi, V.; Goyet, Catherine; Prieur, L.; Pujo-pay, M.; Conan, P.; Falco, C.. |
| We relate here the distributions of two carbonate system key properties (total alkalinity, AT; and total dissolved inorganic carbon, CT) measured along a section in the Mediterranean Sea, going from Marseille (France) to the south of the Cyprus Island, during the 2008 BOUM cruise. The three main objectives of the present study are (1) to draw and comment on the distributions of AT and CT in the light of others properties like salinity, temperature, and dissolved oxygen, (2) to estimate the distribution of the anthropogenic CO2 (CANT) in the intermediate and the deep waters, and (3) to calculate the resulting variation of pH (acidification) since the beginning of the industrial era. Since the calculation of CANT is always an intense subject of debate, we... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00133/24383/22397.pdf |
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| Lamy, D.; Jeanthon, C.; Cottrell, M. T.; Kirchman, D. L.; Van Wambeke, France; Ras, J.; Dahan, O.; Pujo-pay, M.; Oriol, L.; Bariat, L.; Catala, P.; Cornet-barthaux, V.; Lebaron, P.. |
| Aerobic anoxygenic phototrophic (AAP) bacteria are photoheterotrophic prokaryotes able to use both light and organic substrates for energy production. They are widely distributed in coastal and oceanic environments and may contribute significantly to the carbon cycle in the upper ocean. To better understand questions regarding links between the ecology of these photoheterotrophic bacteria and the trophic status of water masses, we examined their horizontal and vertical distribution and the effects of nutrient additions on their growth along an oligotrophic gradient in the Mediterranean Sea. Concentrations of bacteriochlorophyll-a (BChl-a) and AAP bacterial abundance decreased from the western to the eastern basin of the Mediterranean Sea and were linked... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24398/22417.pdf |
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| Gorsky, Gabriel; Bourdin, Guillaume; Lombard, Fabien; Pedrotti, Maria Luiza; Audrain, Samuel; Bin, Nicolas; Boss, Emmanuel; Bowler, Chris; Cassar, Nicolas; Caudan, Loic; Chabot, Genevieve; Cohen, Natalie R.; Cron, Daniel; De Vargas, Colomban; Dolan, John R.; Douville, Eric; Elineau, Amanda; Flores, J. Michel; Ghiglione, Jean Francois; Haentjens, Nils; Hertau, Martin; John, Seth G.; Kelly, Rachel L.; Koren, Ilan; Lin, Yajuan; Marie, Dominique; Moulin, Clementine; Moucherie, Yohann; Pesant, Stephane; Picheral, Marc; Poulain, Julie; Pujo-pay, Mireille; Reverdin, Gilles; Romac, Sarah; Sullivan, Mathew B.; Trainic, Miri; Tressol, Marc; Trouble, Romain; Vardi, Assaf; Voolstra, Christian R.; Wincker, Patrick; Agostini, Sylvain; Banaigs, Bernard; Boissin, Emilie; Forcioli, Didier; Furla, Paola; Galand, Pierre E.; Gilson, Eric; Reynaud, Stephanie; Sunagawa, Shinichi; Thomas, Olivier P.; Thurber, Rebecca Lisette Vega; Zoccola, Didier; Planes, Serge; Allemand, Denis; Karsenti, Eric; Planes, S.; Banaig, B.; Boissin, E.; Iwankow, G.; Allemand, D.; Zoccola, D.; Reynaud, S.; Beraud, E.; Djerbi, N.; Forcioli, D.; Furla, P.; Gilson, E.; Mcmind, R.; Ottaviani, A.; Rottinger, E.; Rouan, A.; Zamoum, T.; Flume, B. C. C.; Pogoreutz, C.; Voolstra, C. R.; Rothig, T.; Ziegler, M.; Paoli, L.; Ruscheweyh, H-j; Salazar, G.; Sunagawa, S.; Flores, J. M.; Koren, I; Trainic, M.; Lang-yona, N.; Vardi, A.; Conan, P.; Ghiglione, J-f; Pujo-pay, M.; Galand, P. E.; Hochart, C.; Audrain, S.; Bourgois, E.; Hertau, M.; Lancelot, J.; Monmarche, D.; Moulin, C.; Moucherie, Y.; Trouble, R.; Boss, E.; Bourdin, G.; Haentjens, N.; Karp-boss, L.; Douville, Eric; Agostini, S.; Mitsuhashi, G.; Kitano, Y.; Da Silva, O.; Dolan, J. R.; Gorsky, G.; Lemee, R.; Lombard, F.; Pedrotti, M-l; Cronin, D.; Sullivan, M.; Armstrong, E.; Aury, J-m; Barbe, V; Belser, C.; Carradec, Q.; Labadie, K.; Le-hoang, J.; Noel, B.; Poulain, J.; Wincker, P.; Klinges, G.; Vega-thunder, R.; Bonnival, E.; De Vargas, C.; Henry, N.; Marie, D.; Romac, S.; Pesant, S.; Miguel-gorda, M.; Thomas, O. P.; Bowler, C.; Friedrich, R.; Cassar, N.; Lin, Y.; John, S. G.; Kelly, R. L.; Cohen, N. R.; Reverdin, G.; Filee, J.. |
| Interactions between the ocean and the atmosphere occur at the air-sea interface through the transfer of momentum, heat, gases and particulate matter, and through the impact of the upper-ocean biology on the composition and radiative properties of this boundary layer. The Tara Pacific expedition, launched in May 2016 aboard the schooner Tara, was a 29-month exploration with the dual goals to study the ecology of reef ecosystems along ecological gradients in the Pacific Ocean and to assess inter-island and open ocean surface plankton and neuston community structures. In addition, key atmospheric properties were measured to study links between the two boundary layer properties. A major challenge for the open ocean sampling was the lack of ship-time available... |
| Tipo: Text |
Palavras-chave: Neuston/plankton genomics/taxonomy/imaging; Aerosols; NCP; IOP; Trace metals; Microplastic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00599/71083/69390.pdf |
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| Auger, Pierre-amael; Diaz, F.; Ulses, C.; Estournel, Claude; Neveux, J.; Joux, F.; Pujo-pay, M.; Naudin, J. J.. |
| A coupled hydrodynamic-biogeochemical modelling is developed to address main mechanisms that drive the particulate organic carbon (POC) deposition in the Gulf of Lions (NW-Mediterranean). Low-salinity water (LSW, salinity < 37.5) lenses detached from the Rhone River plume under specific wind conditions tend to favour the biological productivity and provide a good opportunity for validating a planktonic ecosystem modelling. A specific calibration dedicated to river plume ecosystems is then proposed and validated using in situ measurements within such LSW lens (BIOPRHOFI cruise - May 2006) and on the Gulf of Lions. During spring 2006, the POC deposition is maximal on the prodelta area and within the coastal area in the Gulf of Lions. Organic detritus... |
| Tipo: Text |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00216/32763/31187.pdf |
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| Popendorf, K. J.; Tanaka, T.; Pujo-pay, M.; Lagaria, A.; Courties, C.; Conan, Pascal; Oriol, L.; Sofen, L. E.; Moutin, T.; Van Mooy, B. A. S.. |
| Intact polar membrane lipids compose a significant fraction of cellular material in plankton and their synthesis imposes a substantial constraint on planktonic nutrient requirements. As a part of the Biogeochemistry from the Oligotrophic to the Ultraoligotrophic Mediterranean (BOUM) cruise we examined the distribution of several classes of intact polar diacylglycerolipids (IP-DAGs) across the Mediterranean, and found that phospholipid concentration as a percent of total lipids correlated with phosphate concentration. In addition, the ratios of non-phosphorus lipids to phospholipids - sulfoquinovosyldiacylglycerol (SQDG) to phosphatidylglycerol (PG), and betaine lipids to phosphatidylcholine (PC) - were also found to increase from west to east across the... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24405/22410.pdf |
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| Dall'Olmo, G.; Boss, E.; Behrenfeld, M. J.; Westberry, T. K.; Courties, C.; Prieur, L.; Pujo-pay, M.; Hardman-mountford, N.; Moutin, T.. |
| The diurnal fluctuations in solar irradiance impose a fundamental frequency on ocean biogeochemistry. Observations of the ocean carbon cycle at these frequencies are rare, but could be considerably expanded by measuring and interpreting the inherent optical properties. A method is presented to analyze diel cycles in particulate beam-attenuation coefficient (c(p)) measured at multiple wavelengths. The method is based on fitting observations with a size-structured population model coupled to an optical model to infer the particle size distribution and physiologically relevant parameters of the cells responsible for the measured diel cycle in c(p). Results show that the information related to size and contained in the spectral data can be exploited to... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24404/22420.pdf |
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| Pujo-pay, M.; Conan, Pascal; Oriol, L.; Cornet-barthaux, V.; Falco, C.; Ghiglione, J. -f.; Goyet, C.; Moutin, T.; Prieur, L.. |
| This paper provides an extensive vertical and longitudinal description of the biogeochemistry along an East-West transect of 3000 km across the Mediterranean Sea during summer 2008 (BOUM cruise). During this period of strong stratification, the distribution of nutrients, particulate and dissolved organic carbon (DOC), nitrogen (DON) and phosphorus (DOP) were examined to produce a detailed spatial and vertically extended description of the elemental stoichiometry of the Mediterranean Sea. Surface waters were depleted in nutrients and the thickness of this depleted layer increased towards the East from about 10 m in the Gulf of Lion to more than 100 m in the Levantine basin, with the phosphacline deepening to a greater extent than that for corresponding... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24396/22409.pdf |
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| Tanaka, T.; Thingstad, T. F.; Christaki, U.; Colombet, J.; Cornet-barthaux, V.; Courties, C.; Grattepanche, J. -d.; Lagaria, A.; Nedoma, J.; Oriol, L.; Psarra, S.; Pujo-pay, M.; Van Wambeke, France. |
| We investigated the identity of the limiting nutrient of the pelagic microbial food web in the Mediterranean Sea using nutrient manipulated microcosms during summer 2008. Experiments were carried out with surface waters at the center of anticyclonic eddies in the Western Basin, the Ionian Basin, and the Levantine Basin. In situ, the ratio of N to P was always higher in both dissolved and particulate organic fractions compared to the Redfield ratio, suggesting a relative P-starvation. In each experiment, four different treatments in triplicates (addition of ammonium, phosphate, a combination of both, and the unamended control) were employed and chemical and biological parameters monitored throughout a 3-4 day incubation. Temporal changes of turnover time of... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24395/22406.pdf |
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| Christaki, U.; Van Wambeke, France; Lefevre, D.; Lagaria, A.; Prieur, L.; Pujo-pay, M.; Grattepanche, J. -d.; Colombet, J.; Psarra, S.; Dolan, J. R.; Sime-ngando, T.; Conan, Pascal; Weinbauer, M. G.; Moutin, T.. |
| The abundance and activity of the major members of the heterotrophic microbial community - from viruses to ciliates - were studied along a longitudinal transect across the Mediterranean Sea in the summer of 2008. The Mediterranean Sea is characterized by a west to east gradient of deepening of DCM (deep chlorophyll maximum) and increasing oligotrophy reflected in gradients of biomass and production. However, within this well documented longitudinal trend, hydrological mesoscale features exist and likely influence microbial dynamics. Here we present data from a W-E transect of 17 stations during the period of summer stratification. Along the transect the production and fate of organic matter was investigated at three selected sites each one located in the... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24400/22422.pdf |
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| Ridame, Celine; Le Moal, Marc; Guieu, Cecile; Ternon, E.; Biegala, I.c.; L'Helguen, Stéphane; Pujo-pay, M.. |
| A better understanding of the factors controlling N2 fixation is a pre-requisite for improving our knowledge on the contribution of N2 fixation process in the nitrogen cycling. Trace-metal clean nutrient/dust addition bioassays (+P, +PFe, +dust) were performed at three stations located in the western, central and eastern Mediterranean Sea, in summer 2008 as part of the BOUM cruise. The main goals were (1) to investigate the nutrient factor(s) limiting N2 fixation (uptake of 15N2) and (2) to evaluate the potential impact of a Saharan dust event on this biological process during the stratification period. Initially, surface waters at the three stations were DIP-depleted (<10 nM) while the DFe concentrations were relatively high (from 1.2 to 2.3 nM) most... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24410/22403.pdf |
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| Ghiglione, J. F.; Palacios, C.; Marty, J. C.; Mevel, G.; Labrune, C.; Conan, P.; Pujo-pay, M.; Garcia, N.; Goutx, M.. |
| Bacterioplankton plays a central role in energy and matter fluxes in the sea, yet the factors that constrain its variation in marine systems are still poorly understood. Here we use the explanatory power of direct multivariate gradient analysis to evaluate the driving forces exerted by environmental parameters on bacterial community distribution in the water column. We gathered and analysed data from a one month sampling period from the surface to 1000m depth at the JGOFS-DYFAMED station (NW Mediterranean Sea). This station is characterized by very poor horizontal advection currents which makes it an ideal model to test hypotheses on the causes of vertical stratification of bacterial communities. Capillary electrophoresis single strand conformation... |
| Tipo: Text |
Palavras-chave: Free living bacteria; Ribosomal RNA genes; Strand conformation polymorphism; Flame ionization detection; Dissolved organic carbon; 16S RDNA; Microbial diversity; Lipid classes; Phytoplankton dynamics; Multivariate analyses. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00208/31974/30409.pdf |
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| Goutx, M.; Guigue, C.; Aritio, D.; Ghiglione, J.; Pujo-pay, M.; Andersen, V.. |
| Changes in concentration and composition of dissolved lipid classes (Iatroscan TLC/FID) were examined at daily to month scale, in relation to the hydrological and biological situation at a central site of the Ligurian sea, NW Mediterranean during the PECHE-DYNAPROC 2 experiment (14 September to 17 October). Dissolved lipid concentrations (TLd) and lipid to DOC ratios varied in the range 5.3–48.5 μg l−1 and 0.01 to 0.08 respectively, along the 0–1000m water column. The highest TLd concentration values were found in the 0–150m surface layer coinciding with phytoplankton biomass. Lipid class composition provided valuable information on the origin of DOM, and the changes that occurred during the period investigated. The significant correlations (p<0.01,... |
| Tipo: Text |
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| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00212/32330/30788.pdf |
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| Lagaria, A.; Psarra, S.; Lefevre, D.; Van Wambeke, France; Courties, C.; Pujo-pay, M.; Oriol, L.; Tanaka, T.; Christaki, U.. |
| We examined the effects of nutrient additions on rates of (14)C-based particulate and dissolved primary production as well as O(2)-based metabolic rates in surface waters (8 m) of three anticyclonic eddies, located in the Western, Central and Eastern Mediterranean. Ship-board microcosm experiments employing additions of inorganic nitrogen (+N) and phosphorus (+P), alone and in combination (+NP), were conducted in June/July 2008 during the BOUM (Biogeochemistry from the Oligotrophic to the Ultra-oligotrophic Mediterranean) cruise. In all three experiments, particulate primary production was significantly stimulated by the additions of nitrogen (+N, +NP) while no effect was observed with the addition of phosphorus alone (+P). Percent extracellular release of... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24401/22418.pdf |
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| Planes, Serge; Allemand, Denis; Agostini, Sylvain; Banaigs, Bernard; Boissin, Emilie; Boss, Emmanuel; Bourdin, Guillaume; Bowler, Chris; Douville, Eric; Flores, J. Michel; Forcioli, Didier; Furla, Paola; Galand, Pierre E.; Ghiglione, Jean-francois; Gilson, Eric; Lombard, Fabien; Moulin, Clementine; Pesant, Stephane; Poulain, Julie; Reynaud, Stephanie; Romac, Sarah; Sullivan, Matthew B.; Sunagawa, Shinichi; Thomas, Olivier P.; Trouble, Romain; De Vargas, Colomban; Thurber, Rebecca Vega; Voolstra, Christian R.; Wincker, Patrick; Zoccola, Didier; Planes, S.; Allemand, D.; Agostini, S.; Armstrong, E.; Audrain, S.; Aury, J-m; Banaig, B.; Barbe, V; Belser, C.; Beraud, E.; Boissin, E.; Bonnival, E.; Boss, E.; Bourdin, G.; Bourgois, E.; Bowler, C.; Carradec, Q.; Cassar, N.; Cohen, N. R.; Conan, P.; Cronin, D. R.; Da Silva, O.; De Vargas, C.; Djerbi, N.; Dolan, J. R.; Herta, Dominguez G.; Douville, Eric; Du J,; Filee, J.; Flores, J. M.; Forcioli, D.; Friedrich, R.; Furla, P.; Galand, P. E.; Ghiglione, J-f; Gilson, E.; Gorsky, G.; Guinther, M.; Haentjens, N.; Henry, N.; Hertau, M.; Hochart, C.; Hume, B. C. C.; Iwankow, G.; John, S. G.; Karp-boss, L.; Kelly, R. L.; Kitano, Y.; Klinges, G.; Koren, I; Labadie, K.; Lancelot, J.; Lang-yona, N.; Le-hoang, J.; Lemee, R.; Lin, Y.; Lombard, F.; Marie, D.; Mcmind, R.; Miguel-gordo, M.; Trainic, M.; Monmarche, D.; Moulin, C.; Mucherie, Y.; Noel, B.; Ottaviani, A.; Paoli, L.; Pedrotti, M-l; Pesant, S.; Pogoreutz, C.; Poulain, J.; Pujo-pay, M.; Reverdin, G.; Reynaud, S.; Romac, S.; Rothig, T.; Rottinger, E.; Rouan, A.; Ruscheweyh, H-j; Salazar, G.; Sullivan, M. B.; Sunagawa, S.; Thomas, O. P.; Trouble, R.; Vardi, A.; Vega-thunder, R.; Voolstra, C. R.; Wincker, P.; Zahed, A.; Zamoum, T.; Ziegler, M.; Zoccola, D.. |
| Coral reefs are the most diverse habitats in the marine realm. Their productivity, structural complexity, and biodiversity critically depend on ecosystem services provided by corals that are threatened because of climate change effects-in particular, ocean warming and acidification. The coral holobiont is composed of the coral animal host, endosymbiotic dinoflagellates, associated viruses, bacteria, and other microeukaryotes. In particular, the mandatory photosymbiosis with microalgae of the family Symbiodiniaceae and its consequences on the evolution, physiology, and stress resilience of the coral holobiont have yet to be fully elucidated. The functioning of the holobiont as a whole is largely unknown, although bacteria and viruses are presumed to play... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00593/70500/68650.pdf |
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| Van Wambeke, France; Catala, P.; Pujo-pay, M.; Lebaron, P.. |
| Heterotrophic bacterioplankton abundance and production were investigated with depth (down to bathypelagic layers) and with longitude (from 4.9 degrees E to 32.7 degrees E) along a cruise track across the Mediterranean Sea in early summer 2008. Abundances and flow cytometric characteristics (green fluorescence and side scatter signals) of high nucleic acid (HNA) and low nucleic acid (LNA) bacterial cells were determined using flow cytometry. Contrary to what is generally observed, the relative importance of HNA cells, as a percent of total cells, (%HNA, range 30-69%) was inversely related to bacterial production (range 0.15-44 ngC l(-1) h(-1)) although the negative relation was weak (log-log regression r(2) = 0.19). The %HNA as well as the mean side... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24390/22404.pdf |
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| Registros recuperados: 18 | |
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