Distribution of seafloor litter and its interaction with benthic organisms in deep waters of the Ligurian Sea (Northwestern Mediterranean)

2021 ◽  
pp. 147745
Author(s):  
Angiolillo Michela ◽  
Gérigny Olivia ◽  
Valente Tommaso ◽  
Fabri Marie-Claire ◽  
Tambute Eric ◽  
...  
Keyword(s):  
Benthic Organisms ◽  
Ligurian Sea ◽  
Deep Waters ◽  
Northwestern Mediterranean

High-frequency fluxes of labile compounds in the central Ligurian Sea, northwestern Mediterranean

2000 ◽  
Vol 47 (3) ◽  
pp. 533-556 ◽  
Author(s):  
M Goutx ◽  
A Momzikoff ◽  
L Striby ◽  
V Andersen ◽  
J.C Marty ◽  
...  
Keyword(s):  
High Frequency ◽  
Ligurian Sea ◽  
Northwestern Mediterranean

scholarly journals Dicrotrichura tricincta gen. et spec. nov.: A new tantulocaridan (Crustacea: Maxillopoda) from the Mediterranean deep waters off Corsica

1989 ◽  
Vol 59 (4) ◽  
pp. 243-249 ◽  
Author(s):  
Rony Huys
Keyword(s):  
New Genus ◽  
Western Mediterranean ◽  
New Genus And Species ◽  
Free Living ◽  
Ligurian Sea ◽  
Deep Waters ◽  
The Mediterranean ◽  
The Difference ◽  
First Time ◽  
Crustacean Host

The new genus and species, Dicrotrichura tricincta, is described from deep mud (1220 m) in the Ligurian Sea (western Mediterranean). It is the first tantulocaridan not found to be attached to a crustacean host but free living in the sediment. It is assigned to the Deoterthridae on the basis of the absence of a rostrum, the abdominal segmentation and the characteristic cephalic pore pattern. It can be distinguished from all known tantulocaridans in the presence of peculiar, bi-articulated caudal setae and the difference in thoracopodal setation between leg 2 and legs 3–5. Some new structures located on the attachment disc are described for the first time. D. tricincta is the second tantulocaridan to be recorded from the Mediterranean.

scholarly journals Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea

Ocean Science ◽  
2008 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
E. Praca ◽  
A. Gannier
Keyword(s):  
Mediterranean Sea ◽  
Sperm Whale ◽  
Ecological Niches ◽  
Sperm Whales ◽  
Ligurian Sea ◽  
Data Set ◽  
Pilot Whale ◽  
Northwestern Mediterranean Sea ◽  
Pilot Whales ◽  
Northwestern Mediterranean

Abstract. In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological niches using a discriminant analysis. We used a long term (1995–2005) small boat data set, with visual and acoustic (sperm whale) detections. Risso's dolphin had the shallowest and the more spatially restricted principal habitat, mainly located on the upper part of the continental slope (640 m mean depth). With a wider principal habitat, at 1750 m depth in average, the sperm whale used a deeper part of the slope as well as the closest offshore waters. Finally, the pilot whale has the most oceanic habitat (2500 m mean depth) mainly located in the central Ligurian Sea and Provençal basin. Therefore, potential competition for food between these species may be reduced by the differentiation of their habitats.

scholarly journals Abrupt warming and salinification of intermediate waters interplays with decline of deep convection in the Northwestern Mediterranean Sea

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Félix Margirier ◽  
Pierre Testor ◽  
Emma Heslop ◽  
Katia Mallil ◽  
Anthony Bosse ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Deep Convection ◽  
Salt Content ◽  
Heat Fluxes ◽  
High Temporal Resolution ◽  
Intermediate Water ◽  
Ligurian Sea ◽  
Spatial Coverage ◽  
Northwestern Mediterranean

AbstractThe Mediterranean Sea is a hotspot for climate change, and recent studies have reported its intense warming and salinification. In this study, we use an outstanding dataset relying mostly on glider endurance lines but also on other platforms to track these trends in the northwestern Mediterranean where deep convection occurs. Thanks to a high spatial coverage and a high temporal resolution over the period 2007–2017, we observed the warming (+0.06 $$^\circ$$ ∘ C year$$^{-1}$$ - 1 ) and salinification (+0.012 year$$^{-1}$$ - 1 ) of Levantine Intermediate Water (LIW) in the Ligurian Sea. These rates are similar to those reported closer to its formation area in the Eastern Mediterranean Sea. Further downstream, in the Gulf of Lion, the intermediate heat and salt content were exported to the deep layers from 2009 to 2013 thanks to deep convection processes. In 2014, a LIW step of +0.3 $$^\circ$$ ∘ C and +0.08 in salinity could be observed concomitant with a weak winter convection. Warmer and more saline LIW subsequently accumulated in the northwestern basin in the absence of intense deep convective winters until 2018. Deep stratification below the LIW thus increased, which, together with the air–sea heat fluxes intensity, constrained the depth of convection. A key prognostic indicator of the intensity of deep convective events appears to be the convection depth of the previous year.

scholarly journals Natural and anthropogenic trace metals in sediments of the Ligurian Sea (Northwestern Mediterranean)

2012 ◽  
Vol 291 ◽  
pp. 141-151 ◽  
Author(s):  
Lars-Eric Heimbürger ◽  
Daniel Cossa ◽  
Benoit Thibodeau ◽  
Alexis Khripounoff ◽  
Virginie Mas ◽  
...  
Keyword(s):  
Trace Metals ◽  
Ligurian Sea ◽  
Northwestern Mediterranean

scholarly journals Wind-Forced Submesoscale Symmetric Instability around Deep Convection in the Northwestern Mediterranean Sea

Fluids ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 123
Author(s):  
Anthony Bosse ◽  
Pierre Testor ◽  
Pierre Damien ◽  
Claude Estournel ◽  
Patrick Marsaleix ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Mixed Layer ◽  
Deep Convection ◽  
Realistic Model ◽  
Ligurian Sea ◽  
Vertical Movements ◽  
Northwestern Mediterranean Sea ◽  
Wind Events ◽  
Northwestern Mediterranean ◽  
Symmetric Instability

During the winter from 2009 to 2013, the mixed layer reached the seafloor at about 2500 m in the northwestern Mediterranean Sea. Intense fronts around the deep convection area were repeatedly sampled by autonomous gliders. Subduction down to 200–300 m, sometimes deeper, below the mixed layer was regularly observed testifying of important frontal vertical movements. Potential Vorticity dynamics was diagnosed using glider observations and a high resolution realistic model at 1-km resolution. During down-front wind events in winter, remarkable layers of negative PV were observed in the upper 100 m on the dense side of fronts surrounding the deep convection area and successfully reproduced by the numerical model. Under such conditions, symmetric instability can grow and overturn water along isopycnals within typically 1–5 km cross-frontal slanted cells. Two important hotpspots for the destruction of PV along the topographically-steered Northern Current undergoing frequent down-front winds have been identified in the western part of Gulf of Lion and Ligurian Sea. Fronts were there symmetrically unstable for up to 30 days per winter in the model, whereas localized instability events were found in the open sea, mostly influenced by mesoscale variability. The associated vertical circulations also had an important signature on oxygen and fluorescence, highlighting their under important role for the ventilation of intermediate layers, phytoplankton growth and carbon export.

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