scholarly journals Marine Seagrasses Transplantation in Confined and Coastal Adriatic Environments: Methods and Results

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2289
Author(s):  
Daniele Curiel ◽  
Sandra Kraljević Pavelić ◽  
Agata Kovačev ◽  
Chiara Miotti ◽  
Andrea Rismondo
Keyword(s):  
Twentieth Century ◽  
Zostera Marina ◽  
Adriatic Sea ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Anthropogenic Pressures ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
The North ◽  
Over Time

The anthropogenic pressures of the twentieth century have seriously endangered the Mediterranean coastal zone; as a consequence, marine seagrass habitats have strongly retreated, mostly those of Posidonia oceanica. For this reason, over time, restoration programs have been put in place through transplantation activities, with different success. These actions have also been conducted with other Mediterranean marine seagrasses. The results of numerous transplanting operations conducted in the Northern Adriatic Sea and lagoons with Cymodocea nodosa, Zostera marina and Z. noltei and in the Central and Southern Adriatic Sea with P. oceanica (only within the project Interreg SASPAS), are herein presented and compared, taking also into account the presence of extensive meadows of C. nodosa, Z. marina and Z. noltei, along the North Adriatic coasts and lagoons.

scholarly journals European Transport Corridors and North Adriatic Ports

2015 ◽  
Vol 3 (2) ◽  
pp. 1-7
Author(s):  
Helena Bínová ◽  
◽  
Martin Jurkovič
Keyword(s):  
Financial Support ◽  
Central And Eastern Europe ◽  
Adriatic Sea ◽  
Far East ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
The North ◽  
The Far East ◽  
Sea Ports ◽  
The Eu

From the ports in the northern Adriatic Sea (ports of Ravenna, Venezia, Trieste, Koper, Rijeka) a route from European ports of North Sea to the Far East is shorter by about 2000 nautical miles. It means a reduction of 6 to 8 days in shipping. These ports are reachable from commercial and industrial centers of Central and Eastern Europe. An assessment of the current situation and future development of the European transport corridors North - South, including possible interconnection by multimodal corridors Baltic ports in the north and Adriatic ports in the south, is included in this paper. This corridor is one of the ten basic corridors included in the new conception of the TEN-T European transport network with the assumption of financial support from the EU in the period of 2014-2020. Further, the paper also includes an analysis of a modal assessment (Modal Split) of transport connections of Central Europe with the Far East. The heart of the paper is a proposal of connection of chosen seaports that serve as logistics terminals to current European multimodal corridors and further to proposed multimodal corridors.

scholarly journals Rare records of the false killer whales (Pseudorca crassidens) in the Adriatic Sea

2021 ◽  
Vol 30 (1) ◽  
pp. 263-268
Author(s):  
Draško Holcer ◽  
◽  
Jure Miočić-Stošić ◽  
Tihana Vučur Blazinić ◽  
◽  
...  
Keyword(s):  
Twentieth Century ◽  
Mediterranean Sea ◽  
Species Identification ◽  
Citizen Science ◽  
Adriatic Sea ◽  
Marine Species ◽  
Killer Whales ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Pseudorca Crassidens

In spring 2021, four unusual encounters with a group of false killer whales were recorded in Kvarner Bay, Northern Adriatic Sea. A minimum of five individuals, including a calf, were observed and two photos were taken corroborating species identification. These are the first reported sightings of the species in the Adriatic Sea since the mid-twentieth century. In addition, another encounter was revealed that occurred at the end of the 2000s in the same location and should be added to the list of historic observations. These reports were obtained by chance and show the importance of citizen science in obtaining data on rare marine species. The information gathered goes towards a better understanding of the distribution of the species in the Mediterranean Sea.

scholarly journals Correlation between tides of northern Adriatic sea and hydrodynamics of the karstic aquifer in the Pozzo dei Protei di Monfalcone (Classical Karst)

2020 ◽  
Vol 49 (1) ◽  
Author(s):  
Rino Semerraro ◽  
Federico Valentinuz ◽  
Maurizio Tavagnutti
Keyword(s):  
Electrical Conductivity ◽  
Groundwater Level ◽  
Adriatic Sea ◽  
Salt Water ◽  
Karst Aquifer ◽  
Chloride Ion ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
The North ◽  
Mineralized Water

The Pozzo dei Protei di Monfalcone (northeast Italy) is a cavity developed in Cretaceous limestones (Cenomanian-Turonian) situated near the contact of the north-western zone of the Classical Karst with the Lower Plain of the Isonzo/Soča River. At the bottom of the cave is the groundwater at an average altitude of 1.89 m a.s.l. In consideration of the proximity of the cave with the Adriatic Sea, the possible effects of the tides on the karst aquifer were investigated monitoring groundwater level, electrical conductivity (EC, K25) and water temperature using a CTD diver. Groundwater level daily oscillations show a lag of 4–4.5 hours compared to tides. The electrical conductivity variations that can be correlated to tides are 2–5 μS/cm. Excluding that the cave, given the altimetry, is directly affected by the saltwater wedge, the cyclical variations of the EC would derive from the dispersion at the salt water and fresh water interface and from the mobilization of more mineralized water coming from the rock mass. The hypothesis of mixing fresh and salt water and saline fossil waters in the caves of the area has been verified by a general increase in the chloride ion in this area of the karst aquifer compared to the internal areas of Classical Karst.

scholarly journals Tracing the effects of eutrophication on molluscan communities in sediment cores: outbreaks of an opportunistic species coincide with reduced bioturbation and high frequency of hypoxia in the Adriatic Sea

Paleobiology ◽  
2018 ◽  
Vol 44 (4) ◽  
pp. 575-602 ◽  
Author(s):  
Adam Tomašových ◽  
Ivo Gallmetzer ◽  
Alexandra Haselmair ◽  
Darrell S. Kaufman ◽  
Martina Kralj ◽  
...  
Keyword(s):  
Twentieth Century ◽  
Adriatic Sea ◽  
Anthropogenic Impacts ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Macrobenthic Communities ◽  
Opportunistic Species ◽  
Early Twentieth Century ◽  
Late Twentieth ◽  
Late Twentieth Century

AbstractEstimating the effects and timing of anthropogenic impacts on the composition of macrobenthic communities is challenging, because early twentieth-century surveys are sparse and the corresponding intervals in sedimentary sequences are mixed by bioturbation. Here, to assess the effects of eutrophication on macrobenthic communities in the northern Adriatic Sea, we account for mixing with dating of the bivalve Corbula gibba at two stations with high accumulation (Po prodelta) and one station with moderate accumulation (Isonzo prodelta). We find that, first, pervasively bioturbated muds typical of highstand conditions deposited in the early twentieth century were replaced by muds with relicts of flood layers and high content of total organic carbon (TOC) deposited in the late twentieth century at the Po prodelta. The twentieth century shelly muds at the Isonzo prodelta are amalgamated but also show an upward increase in TOC. Second, dating of C. gibba shells shows that the shift from the early to the late twentieth century is characterized by a decrease in stratigraphic disorder and by an increase in temporal resolution of assemblages from ~25–50 years to ~10–20 years in both regions. This shift reflects a decline in the depth of the fully mixed layer from more than 20 cm to a few centimeters. Third, the increase in abundance of the opportunistic species C. gibba and the loss of formerly abundant, hypoxia-sensitive species coincided with the decline in bioturbation, higher preservation of organic matter, and higher frequency of seasonal hypoxia in both regions. This depositional and ecosystem regime shift occurred in ca. a.d. 1950. Therefore, the effects of enhanced food supply on macrobenthic communities were overwhelmed by oxygen depletion, even when hypoxic conditions were limited to few weeks per year in the northern Adriatic Sea. Preservation of trends in molluscan abundance and flood events in cores was enhanced by higher frequency of hypoxia that reduced bioturbation in the late twentieth century.

scholarly journals Diversity and Distribution Patterns of Hard Bottom Polychaete Assemblages in the North Adriatic Sea (Mediterranean)

Diversity ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 408
Author(s):  
Barbara Mikac ◽  
Margherita Licciano ◽  
Andrej Jaklin ◽  
Ljiljana Iveša ◽  
Adriana Giangrande ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Benthic Communities ◽  
Structural Similarity ◽  
Distribution Patterns ◽  
Northern Adriatic Sea ◽  
Environmental Pressures ◽  
Northern Adriatic ◽  
The North ◽  
The Family ◽  
Abundance And Diversity

The knowledge on the hard bottom polychaete assemblages in the Northern Adriatic Sea, a Mediterranean region strongly affected by environmental pressures, is scarce and outdated. The objective of this paper was to update the information on polychaete diversity and depict their patterns of natural spatial variation, in relation to changes in algal coverage at increasing depth. Hard bottom benthos was quantitatively sampled by scraping off the substrate from three stations at Sveti Ivan Island (North Adriatic) at three depths (1.5 m, 5 m and 25 m). Polychaete fauna comprised 107 taxa (the majority of them identified at species level) belonging to 22 families, with the family Syllidae ranking first in terms of number of species, followed by Sabellidae, Nereididae, Eunicidae and Serpulidae. Considering the number of polychaete species and their identity, the present data differed considerably from previous studies carried out in the area. Two alien species, Lepidonotus tenuisetosus, which represented a new record for the Adriatic Sea, and Nereis persica, were recorded. The highest mean abundance, species diversity and internal structural similarity of polychaete assemblages were found at 5 m depth, characterised by complex and heterogeneous algal habitat. The DISTLM forward analysis revealed that the distribution of several algal taxa as well as some algal functional-morphological groups significantly explained the observed distribution patterns of abundance and diversity of polychaete assemblages. The diversity of the North Adriatic hard bottom polychaete fauna is largely underestimated and needs regular updating in order to detect and monitor changes of benthic communities in the area.

scholarly journals Assessment of Posidonia oceanica status along the north Croatian coast (Adriatic Sea)

2015 ◽  
Author(s):  
Ivan Guala ◽  
Ljiljana Iveša ◽  
Patrik Krstinić ◽  
Zrinka Jakl ◽  
Milena Šijan ◽  
...  
Keyword(s):  
Lower Limit ◽  
Adriatic Sea ◽  
Posidonia Oceanica ◽  
Shoot Density ◽  
Monitoring Programme ◽  
Habitats Directive ◽  
Anthropogenic Factors ◽  
Northern Adriatic ◽  
National Monitoring ◽  
The North

Monitoring of Posidonia oceanica was carried out in the framework of the MedMPAnet Project in eight meadows not formerly explored in an area along the north coast of Croatia (Primorje-Gorski Kotar County, Northern Adriatic Sea). The survey was aimed to collect preliminary data as a baseline for future surveillance cycles of the priority habitat 1120 "Posidonia beds" within the framework of the National Monitoring Programme, according to the requirements of the EU Habitats Directive. Fieldwork was carried out in 2013 and 2014 through direct SCUBA diving surveys. At each site, general information on coastal features and potential human pressures was recorded and the following descriptors of meadow conditions were assessed at three depth ranges: shoot density, percent coverage of Posidonia oceanica, dead matte and substrate type; depth and type of lower limits were also recorded for each meadow. Two meadows, located in the island of Rab (Uvala Planka and Frkanj), were investigated during both years of survey in order to test any differences due to the methodological approach we used. Overall, results indicated signs of distress for several meadows. Density ranged from 355±22 to 629±21 shoot per m2 at shallow stations (<10 m depth), from 141±8 to 324±23 shoot per m2 at intermediate depth (about 15 m), and from 79±5 to 157±10 shoot per m2 at the lower limit. Regression was also testified by high coverage of dead matte (locally >40%) especially at the lower limit, which was regressive in four meadows and in no case did it exceed 27 meters in depth. The temporal comparison provided consistent results between the two years for investigation of shoot density, at all sites and throughout the bathymetric range. However, some changes were detected in the deepest portions of both meadows in the coverage of Posidonia oceanica (lower than 50% in 2014). Further monitoring and research campaigns are recommended to improve the level of knowledge on the status of meadows in this area, to develop a baseline for assessing trends on a long-term temporal scale as requested by Habitats Directive, and to shed light on the relevance of both environmental and anthropogenic factors in determining the health status of the meadows. Intercalibration among operators is also suggested to ensure reliable data in implementing the National Monitoring Programme.

scholarly journals Assessment of Posidonia oceanica status along the north Croatian coast (Adriatic Sea)

2015 ◽  
Author(s):  
Ivan Guala ◽  
Ljiljana Iveša ◽  
Patrik Krstinić ◽  
Zrinka Jakl ◽  
Milena Šijan ◽  
...  
Keyword(s):  
Lower Limit ◽  
Adriatic Sea ◽  
Posidonia Oceanica ◽  
Shoot Density ◽  
Monitoring Programme ◽  
Habitats Directive ◽  
Anthropogenic Factors ◽  
Northern Adriatic ◽  
National Monitoring ◽  
The North

Monitoring of Posidonia oceanica was carried out in the framework of the MedMPAnet Project in eight meadows not formerly explored in an area along the north coast of Croatia (Primorje-Gorski Kotar County, Northern Adriatic Sea). The survey was aimed to collect preliminary data as a baseline for future surveillance cycles of the priority habitat 1120 "Posidonia beds" within the framework of the National Monitoring Programme, according to the requirements of the EU Habitats Directive. Fieldwork was carried out in 2013 and 2014 through direct SCUBA diving surveys. At each site, general information on coastal features and potential human pressures was recorded and the following descriptors of meadow conditions were assessed at three depth ranges: shoot density, percent coverage of Posidonia oceanica, dead matte and substrate type; depth and type of lower limits were also recorded for each meadow. Two meadows, located in the island of Rab (Uvala Planka and Frkanj), were investigated during both years of survey in order to test any differences due to the methodological approach we used. Overall, results indicated signs of distress for several meadows. Density ranged from 355±22 to 629±21 shoot per m2 at shallow stations (<10 m depth), from 141±8 to 324±23 shoot per m2 at intermediate depth (about 15 m), and from 79±5 to 157±10 shoot per m2 at the lower limit. Regression was also testified by high coverage of dead matte (locally >40%) especially at the lower limit, which was regressive in four meadows and in no case did it exceed 27 meters in depth. The temporal comparison provided consistent results between the two years for investigation of shoot density, at all sites and throughout the bathymetric range. However, some changes were detected in the deepest portions of both meadows in the coverage of Posidonia oceanica (lower than 50% in 2014). Further monitoring and research campaigns are recommended to improve the level of knowledge on the status of meadows in this area, to develop a baseline for assessing trends on a long-term temporal scale as requested by Habitats Directive, and to shed light on the relevance of both environmental and anthropogenic factors in determining the health status of the meadows. Intercalibration among operators is also suggested to ensure reliable data in implementing the National Monitoring Programme.

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