Consulta: creatorFacets:"Goutx, M."
Registros recuperados: 5
Data/hora: 16/06/2024 03:28:54

Short term variability of dissolved lipid classes during summer to autumn transition in the Ligurian sea (NW Mediterranean)
Provedor de dados: 5
Autores: 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&lt;0.01,...
Tipo: Text
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00212/32330/30788.pdf

Short-scale temporal variability of physical, biological and biogeochemical processes in the NW Mediterranean Sea: an introduction
Provedor de dados: 5
Autores: Andersen, V.; Goutx, M.; Prieur, L.; Dolan, J. R.
In the framework of the PROOF-PECHE project (http://www.obs-vlfr.fr/proof/vt/op/ec/peche/pec.htm) a multi-disciplinary team performed experiments and collected samples during the DYNAPROC2 cruise aboard the RV Thalassa from September to October in 2004. The cruise provided data on the functioning of the pelagic food web by sampling over a month long period in the NW Mediterranean Sea at a fixed station subject to weak horizontal advection currents during a period of hydrological stability. This paper describes the background of the cruise and provides an overview of the results derived from the campaign which constitute the special section. The major objective of the cruise was to assess the relative importance and variability of the pathways of carbon in...
Tipo: Text
Palavras-chave: Spring bloom; Zooplankton community; Vertical distribution; Surface layer; Wind events; Bacterial communities; Food web; Transition; Oligotrophy; Abundance.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00092/20315/17954.pdf

Role of environmental factors for the vertical distribution (0-1000 m) of marine bacterial communities in the NW Mediterranean Sea
Provedor de dados: 5
Autores: 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

Short-term changes in particulate fluxes measured by drifting sediment traps during end summer oligotrophic regime in the NW Mediterranean Sea
Provedor de dados: 5
Autores: Marty, J. C.; Goutx, M.; Guigue, C.; Leblond, N.; Raimbault, P.
Short-term changes in the flux of particulate matter were determined in the central north western Mediterranean Sea (near DYFAMED site) using drifting sediment traps at 200 m depth in the course of the DYNAPROC 2 cruise (14 September-17 October 2004). In this period of marked water column stratification, POC fluxes varied by an order of magnitude, in the range of 0.03-0.29 mgC m(-2) h(-1) over the month and showed very rapid and high variations. Particulate carbon export represented less than 5% of integrated primary production, suggesting that phytoplankton production was essentially sustained by internal recycling of organic matter and retained within the photic zone. While PON and POP fluxes paralleled one another, the elemental ratios POC/PON and...
Tipo: Text
Palavras-chave: Planktonic community structure; Flame ionization detection; Atlantic time series; Organic carbon flux; Deep ocean; Downward fluxes; Particle flux; Vertical flux; Lipid classes; Sargasso sea.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00210/32099/30556.pdf

Seasonal to hour variation scales in abundance and production of total and particle-attached bacteria in the open NW Mediterranean Sea (0-1000 m)
Provedor de dados: 5
Autores: Mevel, G.; Vernet, M.; Goutx, M.; Ghiglione, J. F.
We present the vertical and temporal dynamics of total vs. particle-attached bacterial abundance and activity over a 5 week period under summer to autumn transition in NW Mediterranean Sea. At a weekly time scale, total bacterial biomass and production in the euphotic layers was significantly correlated with phytoplanktonic biomass. At an hourly time scale, total bacterial biomass responded very rapidly to chlorophyll a fluctuations, suggesting a tight coupling between phytoplankton and bacteria for resource partitioning during the summer-autumn transition. In contrast, no influence of diel changes on bacterial parameters was detected. Episodic events such as coastal water intrusions had a significant positive effect on total bacterial abundance and...
Tipo: Text
Palavras-chave: Nucleic acid content; Free living bacteria; Top down control; Flow cytometry; Atlantic ocean; Water column; Spring bloom; Bottom up; North sea; Biogeochemical signifiance.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31973/30408.pdf