Phytoplankton distribution related to different winter conditions in 2016 and 2017 in the open southern Adriatic Sea (eastern Mediterranean)

2021 ◽  
pp. 103665
Author(s):  
Nenad Jasprica ◽  
Marijeta Čalić ◽  
Vedrana Kovačević ◽  
Manuel Bensi ◽  
Iris Dupčić Radić ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Phytoplankton Distribution ◽  
Winter Conditions

scholarly journals Copepod Community Structure in Pre- and Post- Winter Conditions in the Southern Adriatic Sea (NE Mediterranean)

2020 ◽  
Vol 8 (8) ◽  
pp. 567
Author(s):  
Marijana Hure ◽  
Mirna Batistić ◽  
Vedrana Kovačević ◽  
Manuel Bensi ◽  
Rade Garić
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Central Area ◽  
Mesh Size ◽  
Early Spring ◽  
Winter Period ◽  
Late Winter ◽  
Intermediate Water ◽  
Copepod Community ◽  
Winter Conditions

Copepod communities were studied along an east-west transect in the oligotrophic Southern Adriatic Sea. This dynamic region is under the influence of various physical forces, including winter vertical convection, lateral exchanges between coastal and open sea waters, and ingression of water masses of different properties all of which occurred during the investigation periods. Depth-stratified samples were taken with a Nansen net (250 µm mesh size) in pre- and post-winter conditions in 2015/2016. In December, the coastal copepod community was limited over the western flank, while epipelagic waters of the open and eastern waters were characterized by high diversity, low abundances in the central area, and subsurface/upper mesopelagic copepod species. In April, higher abundances were recorded over the entire vertical profile with the surface coastal copepod community present through the entire transect. Higher abundances in the central area during the post-winter period are probably a consequence of late-winter/early spring blooms near the center of the Southern Adriatic. Mesopelagic fauna of both months was characterized by high abundances of Haloptilus longicornis, characteristic species of the eastern Mediterranean, whose larger presence was favored by the cyclonic phase of the North Ionian Gyre and a consequent strong Levantine Intermediate Water ingression.

scholarly journals Qualified temperature, salinity and dissolved oxygen climatologies in a changing Adriatic Sea

2014 ◽  
Vol 11 (1) ◽  
pp. 331-390
Author(s):  
M. Lipizer ◽  
E. Partescano ◽  
A. Rabitti ◽  
A. Giorgetti ◽  
A. Crise
Keyword(s):  
Dissolved Oxygen ◽  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Temporal Stability ◽  
The South ◽  
The North ◽  
Synthetic Temperature ◽  
Oxygen Utilisation ◽  
Oxygen Minimum

Abstract. An updated climatology, based on a comprehensive dataset (1911–2009) of temperature, salinity and dissolved oxygen, has been produced for the whole Adriatic Sea with the Variational Inverse Method using the DIVA software. Climatological maps were produced at 26 levels and validated with Ordinary Cross Validation and with real vs. synthetic Temperature–Salinity diagram intercomparison. The concept of Climatology–Observation Misfit (COM) has been introduced as an estimate of the physical variability associated with the climatological structures. In order to verify the temporal stability of the climatology, long-term variability has been investigated in the Mid Adriatic and the South Adriatic Pits, regarded as the most suitable records of possible long-term changes. Compared with previous climatologies, this study reveals a surface temperature rise (up to 2 °C), a clear deep dissolved oxygen minimum in the South Adriatic Gyre and a bottom summer oxygen minimum in the North Adriatic. Below 100 m all properties profoundly differ between the Middle and the South Adriatic. The South Adriatic Pit clearly shows the remote effects of the Eastern Mediterranean Transient, while no effect is observed in Middle Adriatic Pits. The deepest part of the South Adriatic seems now to be significantly saltier (+0.18 since the period 1911–1914, with an increase of +0.018 decade−1 since the late 1940s) and warmer (+0.54 °C since 1911–1914), even though a long-term temperature trend could not be statistically demonstrated. Conversely, the Middle Adriatic Pits present a long-term increase in apparent oxygen utilisation (+0.77 mL L−1 since 1911–1914, with a constant increase of +0.2 mL L−1 decade−1 after the 1970s).

Distribution and diversity of marine picocyanobacteria community: Targeting of Prochlorococcus ecotypes in winter conditions (southern Adriatic Sea)

2017 ◽  
Vol 36 ◽  
pp. 3-11 ◽  
Author(s):  
Ivana Babić ◽  
Ines Petrić ◽  
Sunčica Bosak ◽  
Hrvoje Mihanović ◽  
Iris Dupčić Radić ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Winter Conditions

Age and growth dynamics of spiny dogfish, Squalus acanthias, in the Adriatic Sea (Eastern Mediterranean Sea)

2016 ◽  
Vol 67 (3) ◽  
pp. 357 ◽  
Author(s):  
Romana Gračan ◽  
Scott A. Heppell ◽  
Gordana Lacković ◽  
Bojan Lazar
Keyword(s):  
Adriatic Sea ◽  
Growth Models ◽  
Eastern Mediterranean ◽  
Growth Dynamics ◽  
Fishing Effort ◽  
Age And Growth ◽  
Percentage Error ◽  
Parameter Estimates ◽  
Spiny Dogfish ◽  
Average Percentage

This research provides the first information on age and growth estimates for the endangered Mediterranean subpopulation of spiny dogfish, a commercially exploited shark, highly sensitive to overexploitation. We collected samples from 206 specimens caught by commercial bottom trawls in the Adriatic Sea, and utilising three ageing protocols achieved good agreement between the readings (average percentage error=1.65%). Four growth models were fitted to length-at-age and weight-at-age data, for each sex separately. The Gompertz growth model produced the statistically best fit resulting in the following parameters: k values for males and females were 0.09 and 0.04 year–1, size-at-birth ranged from 22.9 to 24.1-cm total length, with a theoretical asymptotic length of 103.3cm for males and 173.3cm for females. The age at 50% maturity was 10.5 years for males and 20.1 years for females. The maximum age was estimated at 23 years for males and 36 years for females, with natural mortality estimates of 0.12 for males and 0.07 for females. As a result of reported demographic parameter estimates, high fishing effort and particularly low resilience of the species to exploitation, it is important to produce proper species-specific management strategy for the spiny dogfish in the region.

scholarly journals Tintinnid Ciliate Communities in Pre- and Post-Winter Conditions in the Southern Adriatic Sea (NE Mediterranean)

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2329 ◽  
Author(s):  
Jakica Njire ◽  
Mirna Batistić ◽  
Vedrana Kovačević ◽  
Rade Garić ◽  
Manuel Bensi
Keyword(s):  
Adriatic Sea ◽  
Sea Water ◽  
Dynamic Environment ◽  
Intermediate Water ◽  
The North ◽  
Winter Conditions ◽  
Winter Convection ◽  
Oceanic Species ◽  
Physical Forces ◽  
The Impact

The Southern Adriatic Sea is a dynamic region under the influence of diverse physical forces that modify sea water properties as well as plankton dynamics, abundance, and distribution in an intricate way. The most pronounced being: winter vertical convection, lateral exchanges between coastal and open sea waters, and the ingression of water masses of different properties into the Adriatic. We investigated the distribution and abundance of tintinnid species in this dynamic environment in pre- and post-winter conditions in 2015/2016. A strong ingression of the saline Levantine Intermediate Water, supported by the cyclonic mode of the North Ionian Gyre in 2015 and 2016, in December was associated with a high diversity of oceanic species. An unusual spatial distribution of neritic-estuarine species Codonellopsis schabi was observed in deeper layers along the analyzed transect, which emphasizes the strong influence of physical processes on deep water biology in the South Adriatic. A shift of population toward greater depths (mesopelagic) and modification of deep sea community structure was recorded in April as a consequence of the winter convection-driven sinking of tintinnids. Our findings indicate that tintinnid abundance and composition is heavily influenced by physical conditions and they are good indicators of the impact of physical forces, including climate changes, on marine environment.

Mit zweierlei Maß. Der Adriaraum als Laboratorium spätmittelalterlicher Praktiken des Slaving / Two Degrees of Bondage: The Venetian Adriatic Sea as a Laboratory for European Practices and Discourses of Slavery

2014 ◽  
Vol 73 (1) ◽  
Author(s):  
Juliane Schiel
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Legal Framework ◽  
The Black Sea ◽  
Turn Of The Millennium ◽  
Commercial Policy ◽  
The West ◽  
Late Medieval ◽  
Black Sea Region ◽  
The Balkans

AbstractIt is usually held that by the turn of the millennium Latin Christians stopped enslaving their fellow-believers from within Europe. Scholars have therefore tended to define the late medieval type of domestic slaves in Italian and Iberian households, most of whom had been traded from the Eastern Mediterranean and the Black Sea region to Europe, by their cultural and religious difference. Yet, the numerous Christians from the Balkans who came across the Adriatic Sea to the West (and especially to Venice) clearly complicate the picture. They were mostly under twelve years of age and could be purchased at a very low price. The paper examines the commercial policy of the Venetian Senate in respect of the Adriatic human trafficking and sounds the strategies Venetian merchants used in order to pursue their interests, within and outside the legal framework set by the state authorities East and West of the Adriatic Sea.

scholarly journals Performance of the Adriatic Sea and Coast (AdriSC) climate component – a COAWST V3.3-based coupled atmosphere–ocean modelling suite: atmospheric dataset

2021 ◽  
Vol 14 (6) ◽  
pp. 3995-4017
Author(s):  
Cléa Denamiel ◽  
Petra Pranić ◽  
Damir Ivanković ◽  
Iva Tojčić ◽  
Ivica Vilibić
Keyword(s):  
Climate Models ◽  
Thermohaline Circulation ◽  
Climate Model ◽  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Regional Climate ◽  
Regional Climate Models ◽  
Evaluation Study ◽  
Ocean Model ◽  
Climate Studies

Abstract. In this evaluation study, the coupled atmosphere–ocean Adriatic Sea and Coast (AdriSC) climate model, which was implemented to carry out 31-year evaluation and climate projection simulations in the Adriatic and northern Ionian seas, is briefly presented. The kilometre-scale AdriSC atmospheric results, derived with the Weather Research and Forecasting (WRF) 3 km model for the 1987–2017 period, are then thoroughly compared to a comprehensive publicly and freely available observational dataset. The evaluation shows that overall, except for the summer surface temperatures, which are systematically underestimated, the AdriSC WRF 3 km model has a far better capacity to reproduce surface climate variables (and particularly the rain) than the WRF regional climate models at 0.11∘ resolution. In addition, several spurious data have been found in both gridded products and in situ measurements, which thus should be used with care in the Adriatic region for climate studies at local and regional scales. Long-term simulations with the AdriSC climate model, which couples the WRF 3 km model with a 1 km ocean model, might thus be a new avenue to substantially improve the reproduction, at the climate scale, of the Adriatic Sea dynamics driving the Eastern Mediterranean thermohaline circulation. As such it may also provide new standards for climate studies of orographically developed coastal regions in general.

scholarly journals Histological and Morphological Aspects of Reproduction in Male Blackspotted Smooth-HoundMustelus punctulatusin the Adriatic Sea (Eastern Mediterranean Sea)

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Romana Gračan ◽  
Gordana Lacković
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Seasonal Cycles ◽  
North Central ◽  
The North ◽  
Morphological Aspects ◽  
Maturation Stages ◽  
Seasonal Analysis ◽  
Sexually Mature ◽  
Mature Spermatozoa

We present first data on reproductive biology of male blackspotted smooth-houndMustelus punctulatusin the Adriatic Sea and first histological examination of gonads at different maturation stages and seasonal cycles for this species. We collected samples from 117 male specimens ofM. punctulatusranging in length from 44.6 to 126.5 cm, caught by commercial bottom trawls in the North-Central Adriatic Sea. Microscopic observation revealed a diametric development of testes, in which round-shaped spermatocysts have zonal arrangement, showing seven different stages of development. Males began to mature when they were between 61 and 88 cm body length, which was indicated by the presence of functional claspers or appearance of the spermatogenic cysts. While the smallest mature shark was only 80 cm long, all animals longer than 89 cm were sexually mature. The seasonal analysis of the testes indicated that mature spermatozoa dominated in testes during the first half of the year with a peak in May and June, after which followed less active period during July and August.

Genetic characterization of loggerhead turtle (Caretta caretta) individuals stranded and caught as bycatch from the North-Central Adriatic Sea

2010 ◽  
Vol 31 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Fausto Tinti ◽  
Vincenzo Caputo ◽  
Silvia Franzellitti ◽  
Paola Nisi Cerioni ◽  
Carola Vallini ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Genetic Relationships ◽  
Loggerhead Turtle ◽  
North Central ◽  
Mature Adults ◽  
The North ◽  
Control Region Sequences

AbstractThe North Adriatic Sea is considered a critical feeding and developmental area for Mediterranean loggerhead turtles. In this study, a comparative analysis of mitochondrial DNA control region sequences was carried out on sixty-five loggerhead individuals stranded and caught as bycatch in the Adriatic Sea from 1999 to 2002. We demonstrated the existence of genetic relationships between the North-Central Adriatic (NCA) aggregate and the Central-Eastern Mediterranean rookeries. Short-range and long-range migrations towards the Adriatic Sea were hypothesized by the finding of individuals bearing haplotypes endemic to the nesting populations of Greece and Turkey. The occurrence of individuals belonging to dimensional classes from juveniles to mature adults strongly support both the feeding and developmental role of the NCA.

Sign in / Sign up

Export Citation Format

Share Document