scholarly journals Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). II. Investigating the effects of high trophic levels on nutrients and plankton dynamics and associated feedbacks

2019 ◽  
Vol 405 ◽  
pp. 51-68 ◽  
Author(s):  
Frédéric Diaz ◽  
Daniela Bănaru ◽  
Philippe Verley ◽  
Yunne-Jai Shin
Keyword(s):  
Mediterranean Sea ◽  
Trophic Levels ◽  
Plankton Dynamics ◽  
Gulf Of Lions ◽  
Nw Mediterranean ◽  
End To End ◽  
Nw Mediterranean Sea

scholarly journals Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). I. Parameterization, calibration and evaluation

2019 ◽  
Vol 401 ◽  
pp. 1-19 ◽  
Author(s):  
Daniela Bănaru ◽  
Fréderic Diaz ◽  
Philippe Verley ◽  
Rose Campbell ◽  
Jonathan Navarro ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Gulf Of Lions ◽  
Nw Mediterranean ◽  
End To End ◽  
Nw Mediterranean Sea

scholarly journals Short-scale temporal variability of physical, biological and biogeochemical processes in the NW Mediterranean Sea: an introduction

2009 ◽  
Vol 6 (3) ◽  
pp. 453-461 ◽  
Author(s):  
V. Andersen ◽  
M. Goutx ◽  
L. Prieur ◽  
J. R. Dolan
Keyword(s):  
Mediterranean Sea ◽  
Temporal Variability ◽  
Time Course ◽  
Special Section ◽  
Zooplankton Community ◽  
Western Mediterranean ◽  
Trophic Levels ◽  
Data Set ◽  
Nw Mediterranean ◽  
Nw Mediterranean Sea

Abstract. 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 DYNAPROC 2 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 the open ocean. Intensive sampling through 4 periods of 5 days each was accomplished at a site near the DYFAMED time-series site. The site was near stable in terms of hydrodynamics as there was some evidence of an intrusion of low-salinity coastal water. The cruise yielded a comprehensive data set acquired by sampling over a vertical spatial dimension (0–1000 m) and at high frequencies (ranging from every 3, 6, 12 and/or 24 h), unique for the summer to autumn transition in the North Western Mediterranean. Parameters investigated included the biochemical composition of dissolved organic matter (lipids), and the structure of bacterial communities, phytoplankton and zooplankton community compositions and abundances, as well as zooplankton metabolism, and particulate organic carbon fluxes. Nearly all the parameters described in this section, as well as reports appearing elsewhere, showed time-course variabilities of similar magnitude to those known from a previous study of the spring-summer seasonal transition, a period of marked hydrological change, at the same study site. Remarkably, the least variable characteristic of the system appeared to be the identities of the dominant taxa across several trophic levels (copepods, phytoplankton, ciliates, and bacteria) throughout the study period despite large shifts in stock sizes and fluxes. Thus, the studies of DYNAPROC 2 documented considerable temporal variability of stocks and rates in a system which was, from a hydrological and taxonomic point of view, relatively stable.

Riverine transfer of anthropogenic and natural trace metals to the Gulf of Lions (NW Mediterranean Sea)

2015 ◽  
Vol 58 ◽  
pp. 14-25 ◽  
Author(s):  
C. Dumas ◽  
W. Ludwig ◽  
D. Aubert ◽  
F. Eyrolle ◽  
P. Raimbault ◽  
...  
Keyword(s):  
Trace Metals ◽  
Mediterranean Sea ◽  
Gulf Of Lions ◽  
Nw Mediterranean ◽  
Nw Mediterranean Sea

scholarly journals Effect of ocean warming and acidification on a plankton community in the NW Mediterranean Sea

2014 ◽  
Vol 72 (6) ◽  
pp. 1744-1755 ◽  
Author(s):  
L. Maugendre ◽  
J.-P. Gattuso ◽  
J. Louis ◽  
A. de Kluijver ◽  
S. Marro ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Mediterranean Sea ◽  
Plankton Community ◽  
Ocean Warming ◽  
Trophic Levels ◽  
Elevated Pco2 ◽  
Pco2 Level ◽  
Chl A ◽  
Nw Mediterranean ◽  
Nw Mediterranean Sea

Abstract The effect of ocean warming and acidification was investigated on a natural plankton assemblage from an oligotrophic area, the bay of Villefranche (NW Mediterranean Sea). The assemblage was sampled in March 2012 and exposed to the following four treatments for 12 days: control (∼360 μatm, 14°C), elevated pCO2 (∼610 μatm, 14°C), elevated temperature (∼410 μatm, 17°C), and elevated pCO2 and temperature (∼690 μatm, 17°C). Nutrients were already depleted at the beginning of the experiment and the concentrations of chlorophyll a (chl a), heterotrophic prokaryotes and viruses decreased, under all treatments, throughout the experiment. There were no statistically significant effects of ocean warming and acidification, whether in isolation or combined, on the concentrations of nutrients, particulate organic matter, chl a and most of the photosynthetic pigments. Furthermore, 13C labelling showed that the carbon transfer rates from 13C-sodium bicarbonate into particulate organic carbon were not affected by seawater warming nor acidification. Rates of gross primary production followed the general decreasing trend of chl a concentrations and were significantly higher under elevated temperature, an effect exacerbated when combined to elevated pCO2 level. In contrast to the other algal groups, the picophytoplankton population (cyanobacteria, mostly Synechococcus) increased throughout the experiment and was more abundant in the warmer treatment though to a lesser extent when combined to high pCO2 level. These results suggest that under nutrient-depleted conditions in the Mediterranean Sea, ocean acidification has a very limited impact on the plankton community and that small species will benefit from warming with a potential decrease of the export and energy transfer to higher trophic levels.

scholarly journals Long-term (1998 vs. 2010) large-scale comparison of soft-bottom benthic macrofauna composition in the Gulf of Lions, NW Mediterranean Sea

2018 ◽  
Vol 131 ◽  
pp. 32-45 ◽  
Author(s):  
Paulo Bonifácio ◽  
Antoine Grémare ◽  
Olivier Gauthier ◽  
Alicia Romero-Ramirez ◽  
Sabrina Bichon ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Large Scale ◽  
Benthic Macrofauna ◽  
Soft Bottom ◽  
Gulf Of Lions ◽  
Nw Mediterranean ◽  
Nw Mediterranean Sea

scholarly journals Sources and sinks of sediment-bound contaminants in the Gulf of Lions (NW Mediterranean Sea): A multi-tracer approach

2006 ◽  
Vol 26 (16) ◽  
pp. 1843-1857 ◽  
Author(s):  
Vincent Roussiez ◽  
Wolfgang Ludwig ◽  
André Monaco ◽  
Jean-Luc Probst ◽  
Ioanna Bouloubassi ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Gulf Of Lions ◽  
Sources And Sinks ◽  
Nw Mediterranean ◽  
Nw Mediterranean Sea
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