scholarly journals Dinoflagellate cysts production in the north-western Adriatic Sea

2016 ◽  
Vol 17 (3) ◽  
pp. 751 ◽  
Author(s):  
M. BASTIANINI ◽  
C. TOTTI ◽  
A. PENNA ◽  
A. DE LAZZARI ◽  
M. MONTRESOR
Keyword(s):  
Adriatic Sea ◽  
Sediment Traps ◽  
Dinoflagellate Cysts ◽  
Alexandrium Minutum ◽  
Good Correspondence ◽  
Lingulodinium Polyedrum ◽  
The North ◽  
Cyst Production ◽  
Pcr Method ◽  
North Western

A sediment trap study was conducted in the Gulf of Venice, north-western Adriatic Sea, from April to December 2005 to assess relationships between planktonic dinoflagellates and cyst production. Every month, CTD profiles and discrete samplings for phytoplankton, nutrients and particulate matter were conducted. Cyst fluxes spanned from 90 to 127,600 cysts m-2 d-1 and major peaks were due to a small cyst attributed to cf. Biecheleria and to calcareous cysts of Scrippsiella trochoidea. A good correspondence between cyst fluxes in sediment traps and the presence of the corresponding vegetative cells in the water column was detected for Lingulodinium polyedrum, and species of the genera Spiniferites,Gonyaulax and Protoperidinium. A PCR method applied to surface sediment samples allowed the identification of a number of potentially harmful dinoflagellate cysts (Alexandrium minutum, A. tamutum, A. taylorii, Lingulodinium polyedrum and Protoceratium reticulatum).

scholarly journals Modelling biogeochemical processes in sediments from the north western Adriatic Sea: response to enhanced POC fluxes

2017 ◽  
Author(s):  
Daniele Brigolin ◽  
Christophe Rabouille ◽  
Bruno Bombled ◽  
Silvia Colla ◽  
Salvatrice Vizzini ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Sediment Traps ◽  
Early Diagenesis ◽  
Local Source ◽  
Spatial And Temporal Variability ◽  
Degradation Pathways ◽  
The North ◽  
Biogeochemical Models ◽  
North Western ◽  
Mussel Farm

Abstract. This work presents the result of a study carried out in the north-western Adriatic Sea, by combining two different types of biogeochemical models with field sampling efforts. A longline mussel farm was taken as a local source of perturbation to the natural POC downward flux. This flux was first quantified by means of a pelagic model of POC deposition coupled to sediment traps data, and its effects on sediment bioirrigation capacity and OM degradation pathways were investigated by constraining an early diagenesis model, linked to new data in sediment porewaters. The measurements were performed at stations located inside and outside the area affected by mussel farm deposition. Model-predicted POC fluxes showed marked spatial and temporal variability, which were mostly associated with the dynamics of the farming cycle. Sediment traps data at the two sampled stations (in and out of the mussel farm) showed average POC background flux of 20.0–24.2 mmol C m−2 d−1. The difference of OC fluxes between the two stations was in agreement with model results, ranging between 3.3 and 14.2 mmol C m−2 d−1, and primarily associated with mussel physiological conditions. Although restricted, these changes in POC fluxes induced visible effects on sediment biogeochemistry. Observed oxygen microprofiles presented a 50 % decrease in oxygen penetration depth (from 2.3 to 1.4 mm), accompanied by an increase in the O2 influx at the station below the mussel farm (19–31 versus 10–12 mmol O2 m−2 d−1) characterized by higher POC flux. DIC and NH4+ concentrations had similar behavior, with a more evident effect of bioirrigation underneath the farm. This was confirmed through constraining the early diagenesis model, which calibration leads to an estimation of enhanced and shallower bioirrigation underneath the farm: bioirrigation rates of 40 y−1 and irrigation depth of 15 cm were estimated inside the shellfish deposition footprint versus 20 y−1 and 20 cm outside. These findings were confirmed by independent data on macrofauna composition collected at the study site. Early diagenesis model results indicated a larger organic matter mineralization below the mussel farm (11.1 versus 18.7 mmol m−2 d−1), characterized by similar proportions between oxic and anoxic degradation pathways at the two stations, with an increase in the absolute values of oxygen consumed by OM degradation and reduced substances re-oxidation underneath the mussel farm.

The distribution of sterols and organic-walled dinoflagellate cysts in surface sediments of the North-western Adriatic Sea (Italy)

2005 ◽  
Vol 64 (2-3) ◽  
pp. 395-406 ◽  
Author(s):  
Francesca Sangiorgi ◽  
Daniele Fabbri ◽  
Michela Comandini ◽  
Giovanni Gabbianelli ◽  
Emilio Tagliavini
Keyword(s):  
Surface Sediments ◽  
Adriatic Sea ◽  
Dinoflagellate Cysts ◽  
The North ◽  
North Western

scholarly journals Deep-Water Cartilaginous Fishes in the Central Mediterranean Sea: Comparison between Geographic Areas with Two Low Impact Tools for Sampling

2021 ◽  
Vol 9 (7) ◽  
pp. 686
Author(s):  
Angela Carluccio ◽  
Francesca Capezzuto ◽  
Porzia Maiorano ◽  
Letizia Sion ◽  
Gianfranco D’Onghia
Keyword(s):  
Adriatic Sea ◽  
Fish Habitat ◽  
Conservation Status ◽  
Abundant Species ◽  
Cartilaginous Fish ◽  
Fish Diversity ◽  
Ionian Sea ◽  
Central Mediterranean ◽  
The North ◽  
North Western

Baited lander represents a low impact technique, an alternative to the traditional trawl sampling for collecting data on fish diversity and abundance, especially for threatened species such as Chondrichthyes living in sensitive habitats. In this study, distribution and abundance of cartilaginous fish were compared between two geographic areas, the southern Adriatic Sea and the north-western Ionian Sea, with two low impact sampling gears, an experimental bottom longline and a baited lander. Species diversity was evaluated by applying ecological indices and difference in mean abundances were tested using multivariate analysis. A total of 13 species of cartilaginous fish were collected. Significant differences in the assemblage recorded in the same area using different sampling tools were detected and no significant differences were detected among different areas explored with the same method. Using longline, the most abundant species collected in both areas was Galeus melastomus, while using lander, the most observed species were Dalatias licha in the southern Adriatic Sea and Hexanchus griseus in the north-western Ionian Sea. According to IUCN classification, of the 13 species collected, 2 are near threatened and 5 are threatened. A better governance of sensitive habitats coinciding with the essential fish habitat for these species would ensure them a better conservation status.

Corrigendum to “The first assessment of marine debris in a Site of Community Importance in the north-western Adriatic Sea (Mediterranean Sea)” [Mar. Pollut. Bull. 114 (2017) 821–830]

2020 ◽  
Vol 153 ◽  
pp. 110960
Author(s):  
Valentina Melli ◽  
Michela Angiolillo ◽  
Francesca Ronchi ◽  
Simonepietro Canese ◽  
Otello Giovanardi ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Adriatic Sea ◽  
Marine Debris ◽  
The North ◽  
A Site ◽  
North Western

scholarly journals Organic enrichment and structure of the macrozoobenthic community in the northern Adriatic Sea in an area facing Adige and Po mouths

2004 ◽  
Vol 61 (6) ◽  
pp. 871-881 ◽  
Author(s):  
R. Simonini ◽  
I. Ansaloni ◽  
A.M. Bonvicini Pagliai ◽  
D. Prevedelli
Keyword(s):  
Species Richness ◽  
Adriatic Sea ◽  
Coastal Areas ◽  
Organic Enrichment ◽  
Northern Adriatic ◽  
Opportunistic Species ◽  
Species Richness And Diversity ◽  
The North ◽  
North Western ◽  
Macrozoobenthic Community

Abstract The structure of the macrozoobenthic community and the vertical distribution of organisms in the sediment were studied in order to assess the effects of river outflows and organic enrichment on the benthic community of the North Adriatic Sea. Sampling was carried out at one offshore sandy station (S3) and at two coastal muddy stations (S1 and S2), near to river Po and Adige deltas. Samples were collected in four surveys covering one year from April 1995 to January 1996. In all surveys, the offshore sandy station showed a complex trophic structure, high species richness and diversity, with the occurrence of tubicolous or burrowing polychaetes like Nothria conchylega, Aponuphis bilineata, Maldane sarsi, Nematonereis unicornis and Eunice vittata, which also colonized the deeper sediment layers. On the other hand, the coastal muddy stations both exhibited similar species composition and a great abundance of dominant, opportunistic species such as the bivalve Corbula gibba, typical of unstable sea bottoms with a high rate of sedimentation, and some polychaetes typical of sublittoral muddy bottoms such as Levinsenia gracilis, Aricidea claudiae, Prionospio malmgreni, Sternaspis scutata and P. cirrifera. The high density of a few opportunistic species (mainly surface-deposit feeders) and the scant penetration of organisms within sediments that characterized the stations S1 and S2 support other evidence of the eutrophication of the coastal areas of the north-western Adriatic Sea. However, the high biomass values, the species richness and diversity observed in S1 and S2 suggest the occurrence of less extreme conditions than at other highly-eutrophicated coastal areas. River outflows, eutrophication and, especially, the increasing frequency of acute dystrophic events may be recognized as the driving forces determining the structure and composition of the macrozoobenthic community at coastal areas of north-western Adriatic Sea.

scholarly journals Preliminary study on the antimicrobial susceptibility pattern related to the genotype of Vibrio vulnificus strains isolated in the north-western Adriatic Sea coastal area

2017 ◽  
Vol 6 (4) ◽  
Author(s):  
Patrizia Serratore ◽  
Emanuele Zavatta ◽  
Eleonora Fiocchi ◽  
Emanuele Serafini ◽  
Andrea Serraino ◽  
...  
Keyword(s):  
16S Rrna ◽  
Antimicrobial Susceptibility ◽  
Coastal Area ◽  
Adriatic Sea ◽  
Vibrio Vulnificus ◽  
Clinical Laboratory ◽  
Diffusion Method ◽  
Antimicrobial Susceptibility Pattern ◽  
The North ◽  
North Western

V. vulnificus is a Gram-negative bacterium, commonly found in estuarine and coastal habitats, that can infect humans through seafood consumption or wound exposure. This study represents the first attempt to correlate the genotype of Vibrio vulnificus strains isolated in the north-western Adriatic Sea coastal area, with their antimicrobial susceptibility patterns. On the whole, 40 V. vulnificus strains, isolated from shellfish (n=20), different coastal water bodies (n=19), and the blood of a Carretta carretta turtle (n=1), were utilized. All strains were positive for the species-specific genes vvhA and hsp, with high variability for other markers: 55% (22 out of 40) resulted of the environmental (E) genotype (vcgE, 16S rRNA type A, CPS2 or CPS0), 10% (4 out of 40) of the clinical (C) genotype (vcgC, 16S rRNA type B, CPS1), and 35% (14 out of 40) of the mixed (M) genotype, possessing both E and C markers. The antimicrobial susceptibility was assayed by the diffusion method on agar, according to the Clinical Laboratory Standards Institute (CLSI), utilizing the following commercial disks (Oxoid): ampicillin (AMP), ampicillin- sulbactam (SAM), piperacillin (PRL), cefazolin (KZ), cefotaxime(CTX), ceftazidime( CAZ), imipenem (IPM), meropenem (MEM), amikacin (AK), gentamicin(CN), tetracycline(TE), ciprofloxacin (CIP), levofloxacin (LEV), trimethoprim-sulfamethoxazole (SXT), and chloramphenicol (C). 75% of the strains, (n=30) including all C strains, was sensitive to all the tested antibiotics, whereas E strains showed intermediate sensitivity to AK (2 strains), CIP and CAZ (1 strain), TE (1 strain) and resistance to KZ (1 strain), and 4 M strains showed I to AK.

First Record of the Cornich Blackfish Schedophilus Medusophagus (Pisces: Centrolophidae) Larvae from the Adriatic Sea

1998 ◽  
Vol 78 (3) ◽  
pp. 1035-1038 ◽  
Author(s):  
Jakov Dulčić
Keyword(s):  
Adriatic Sea ◽  
First Record ◽  
Western Mediterranean ◽  
Western Atlantic ◽  
The North ◽  
Pelagia Noctiluca ◽  
North Eastern ◽  
The Town ◽  
North Western ◽  
Mesopelagic Species

The capture of the cornich blackfish, Schedophilus medusophagus, larvae from the Adriatic Sea represents an easterly extension in range of this species, and the first larval record in Adriatic waters.Schedophilus medusophagus Cocco, 1839, is a mesopelagic species from temperate waters of the north-eastern and north-western Atlantic and the western Mediterranean (Bini, 1968; Tortonese, 1975; Haedrich, 1986). The first record of this fish from the Adriatic Sea was reported in 1880 according to Ninni (1912). The second record was during the invasion of medusae Pelagia noctiluca (Malej, 1982; Rottini-Sandrini & Stravisi, 1982; Vučetić, 1982,1983) in Pelješac channel near the town of Korčula-island Koršula (central Adriatic) in 1982 (Onofri, 1986). Ten juvenile specimens, from 10·0 to 20·0cm total length (TL), were collected with medusae at 2m depth. This record Onofri (1986) connected with the ingression of inter-median waters (50–100 m) in the central Adriatic influenced the increase of salinity and temperature in 1982. Jardas (1996) noted that S. medusophagus is a very rare species in the Adriatic Sea.

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