scholarly journals Midwater tunicates: are they related to the permanent front of the Ligurian Sea (NW Mediterranean)?

1991 ◽  
Vol 74 ◽  
pp. 195-204 ◽  
Author(s):  
G Gorsky ◽  
N Lins da Silva ◽  
S Dallot ◽  
Ph Laval ◽  
JC Braconnot ◽  
...  
Keyword(s):  
Ligurian Sea ◽  
Nw Mediterranean

Planktonic prokaryote and protist communities in a submarine canyon system in the Ligurian Sea (NW Mediterranean)

2018 ◽  
Vol 168 ◽  
pp. 210-221 ◽  
Author(s):  
Mauro Celussi ◽  
Grazia Marina Quero ◽  
Luca Zoccarato ◽  
Annalisa Franzo ◽  
Cinzia Corinaldesi ◽  
...  
Keyword(s):  
Submarine Canyon ◽  
Ligurian Sea ◽  
Nw Mediterranean

Drones as tools for monitoring beach topography changes in the Ligurian Sea (NW Mediterranean)

2016 ◽  
Vol 36 (2) ◽  
pp. 151-163 ◽  
Author(s):  
Elisa Casella ◽  
Alessio Rovere ◽  
Andrea Pedroncini ◽  
Colin P. Stark ◽  
Marco Casella ◽  
...  
Keyword(s):  
Ligurian Sea ◽  
Nw Mediterranean

scholarly journals Importance of the variability of hydrographic preconditioning for deep convection in the Gulf of Lion, NW Mediterranean

Ocean Science ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 573-586 ◽  
Author(s):  
L. Grignon ◽  
D. A. Smeed ◽  
H. L. Bryden ◽  
K. Schroeder
Keyword(s):  
Interannual Variability ◽  
Deep Convection ◽  
Mixed Layer Depth ◽  
Surface Fluxes ◽  
Ligurian Sea ◽  
Intermediate Layers ◽  
Gulf Of Lion ◽  
Nw Mediterranean ◽  
Convective Mixed Layer ◽  
Correlation Tests

Abstract. We study the variability of hydrographic preconditioning defined as the heat and salt contents in the Ligurian Sea before convection. The stratification is found to reach a maximum in the intermediate layer in December, whose causes and consequences for the interannual variability of convection are investigated. Further study of the interannual variability and correlation tests between the properties of the deep water formed and the winter surface fluxes support the description of convection as a process that transfers the heat and salt contents from the top and intermediate layers to the deep layer. A proxy for the rate of transfer is given by the final convective mixed layer depth, that is shown to depend equally on the surface fluxes and on the preconditioning. In particular, it is found that deep convection in winter 2004–2005 would have happened even with normal winter conditions, due to low pre-winter stratification.

scholarly journals Importance of the variability of hydrographic preconditioning for deep convection in the Gulf of Lion, NW Mediterranean

2010 ◽  
Vol 7 (1) ◽  
pp. 51-90
Author(s):  
L. Grignon ◽  
D. A. Smeed ◽  
H. L. Bryden ◽  
K. Schroeder
Keyword(s):  
Interannual Variability ◽  
Deep Convection ◽  
Mixed Layer Depth ◽  
Surface Fluxes ◽  
Ligurian Sea ◽  
Intermediate Layers ◽  
Gulf Of Lion ◽  
Nw Mediterranean ◽  
Convective Mixed Layer ◽  
Correlation Tests

Abstract. We study the variability of hydrographic preconditioning defined as the heat and salt contents in the Ligurian Sea before convection. The stratification is found to reach a maximum in the intermediate layer in December, whose causes and consequences for the interannual variability of convection are investigated. Further study of the interannual variability and correlation tests between the properties of the deep water formed and the winter surface fluxes support the description of convection as a process that transfers the heat and salt contents from the top and intermediate layers to the deep layer. A proxy for the rate of transfer is given by the final convective mixed layer depth, that is shown to depend equally on the surface fluxes and on the preconditioning. In particular, it was found that deep convection in winter 2004–2005 would have happened even with normal winter conditions, due to low pre-winter stratification.

Seawater warming at the northern reach for southern species: Gulf of Genoa, NW Mediterranean

2017 ◽  
Vol 98 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Carlo Nike Bianchi ◽  
Francesco Caroli ◽  
Paolo Guidetti ◽  
Carla Morri
Keyword(s):  
Mediterranean Sea ◽  
Native Species ◽  
Indigenous Species ◽  
Ligurian Sea ◽  
The North ◽  
Nw Mediterranean ◽  
The Mediterranean ◽  
Non Indigenous Species ◽  
Southern Species ◽  
North Western

Global warming is facilitating the poleward range expansion of plant and animal species. In the Mediterranean Sea, the concurrent temperature increase and abundance of (sub)tropical non-indigenous species (NIS) is leading to the so-called ‘tropicalization’ of the Mediterranean Sea, which is dramatically evident in the south-eastern sectors of the basin. At the same time, the colder north-western sectors of the basin have been said to undergo a process of ‘meridionalization’, that is the establishment of warm-water native species (WWN) previously restricted to the southern sectors. The Gulf of Genoa (Ligurian Sea) is the north-western reach for southern species of whatever origin in the Mediterranean. Recent (up to 2015) observations of NIS and WWN by diving have been collated to update previous similar inventories. In addition, the relative occurrences of both groups of southern species have been monitored by snorkelling between 2009 and 2015 in shallow rocky reefs at Genoa, and compared with the trend in air and sea surface temperatures. A total of 20 southern species (11 NIS and 9 WWN) was found. Two WWN (the zebra seabream Diplodus cervinus and the parrotfish Sparisoma cretense) and three NIS (the SW Atlantic sponge Paraleucilla magna, the Red Sea polychaete Branchiomma luctuosum, and the amphi-American and amphi-Atlantic crab Percnon gibbesi) are new records for the Ligurian Sea, whereas juveniles of the Indo-Pacific bluespotted cornetfish Fistularia commersonii have been found for the first time. While temperature has kept on increasing for the whole period, with 2014 and 2015 being the warmest years since at least 1950, the number of WWN increased linearly, that of NIS increased exponentially, contradicting the idea of meridionalization and supporting that of tropicalization even in the northern sectors of the Mediterranean basin.

scholarly journals Ingestion and elimination of anthropogenic fibres and microplastic fragments by the European anchovy (Engraulis encrasicolus) of the NW Mediterranean Sea

2020 ◽  
Vol 167 (11) ◽  
Author(s):  
Alessandro Capone ◽  
Mario Petrillo ◽  
Cristina Misic
Keyword(s):  
Stomach Content ◽  
Intestinal Lumen ◽  
Toxic Substances ◽  
Ligurian Sea ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
Nw Mediterranean ◽  
Gut Fullness ◽  
Nw Mediterranean Sea ◽  
European Anchovy Engraulis Encrasicolus

AbstractThis study analysed the anthropogenic microparticles in the stomach content of the European anchovy (Engraulis encrasicolus) in the Ligurian Sea (NW Mediterranean). The results showed that 30–40% of the anchovies had ingested anthropogenic microparticles (on average, 0.34 ± 0.29 fibres ind−1 and 0.12 ± 0.12 fragments ind−1). The fibres were probably ingested via filtration, and were significantly correlated with the gut fullness. Fibres were mostly dark, but the presence of other colours was frequent, indicating a general lack of selectivity. Plastic fragments composed of polyethylene and polypropylene were prevalently transparent, suggesting active predation, especially for larger fragments resembling zooplankton. No significant differences were recorded for the frequency of fish containing particles among females, males, and undetermined individuals. The presence of, generally, only one anthropogenic item per fish, as observed for 95.8% of fish containing microparticles, indicated that the permanence of these particles in the stomachs was short, likely no more than 1 day, although it could also depend on low environmental concentrations. The evaluation of the intestinal lumen indicated that a portion of the plastic fragments found in the stomach could not be ejected. Hard fragments that were larger than the intestinal lumen could be held for longer times, but probably regurgitation, fragmentation, and embedding in a biological matrix may facilitate their quick elimination. It is pivotal to understand the processes that regulate the abundance and the residential time of anthropogenic particles in commercial organisms captured for human nutrition, given the potential biomagnification of toxic substances carried by ingested particles.

Sign in / Sign up

Export Citation Format

Share Document