scholarly journals Natural Recovery and Planned Intervention in Coastal Wetlands: Venice Lagoon (Northern Adriatic Sea, Italy) as a Case Study

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Chiara Facca ◽  
Sonia Ceoldo ◽  
Nicola Pellegrino ◽  
Adriano Sfriso
Keyword(s):  
Organic Phosphorus ◽  
Sustainable Use ◽  
Venice Lagoon ◽  
Detailed Knowledge ◽  
Nutrient Inputs ◽  
Anthropogenic Pressures ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Seagrass Meadows ◽  
Carbon Concentrations

The goals of conservation and sustainable use of environmental ecosystems have increased the need for detailed knowledge of ecological evolution and responses to both anthropogenic pressures and recovery measures. The present study shows the effects of natural processes and planned intervention in terms of reducing nutrient inputs in a highly exploited coastal lagoon, describing its evolution over a 16-year period from the late 1980s (when eutrophication was at its peak) until 2003. Changes in nutrient and carbon concentrations in the top layer of sediments were investigated in parallel with macroalgal and seagrass biomass in the most anthropized basin of Venice Lagoon in four surveys conducted in accordance with the same protocols in 1987, 1993, 1998, and 2003. A pronounced reduction in trophic state (mainly total nitrogen, organic phosphorus, and organic carbon concentrations) and macroalgal biomass was recorded, together with the progressive expansion of seagrass meadows. General considerations are also made on the effects of Manila clam farming and the shift from illegal to managed clam farming.

scholarly journals Trends of Nitrogen and Phosphorus in Surface Sediments of the Lagoons of the Northern Adriatic Sea as a Study Case

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2914
Author(s):  
Adriano Sfriso ◽  
Alessandro Buosi ◽  
Yari Tomio ◽  
Abdul-Salam Juhmani ◽  
Michele Mistri ◽  
...  
Keyword(s):  
Surface Sediments ◽  
Adriatic Sea ◽  
Organic Phosphorus ◽  
Anthropogenic Impacts ◽  
Venice Lagoon ◽  
Nutrient Concentrations ◽  
Nitrogen And Phosphorus ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Po Delta

The analysis of nutrient concentrations in surface sediments is a reliable tool for assessing the trophic status of a water body. Nitrogen and phosphorus concentrations are strongly related to the sediment characteristics but are mainly driven by anthropogenic impacts. The results of the determination of total nitrogen and total inorganic and organic phosphorus in surface sediments of the lagoons and ponds of the northwestern Adriatic Sea (Marano-Grado, Venice, Po Delta, Comacchio Valleys, Pialassa della Baiona) show the merit of this approach. Indeed, when previous data are available, the ratio between the actual and background values can provide useful information on the trophic changes that have occurred in the most recent times, and the results can also explain the conditions present in less studied environments. In this context, numerous studies performed in the Venice lagoon since the second half of the 20th century during different environmental scenarios provide mean concentration ranges and propose the main causes of changes. The results of single datasets available for the other lagoons fall into scenarios that occurred in the Venice lagoon. At present, the most eutrophic basins are Pialassa della Baiona, the Po Delta lagoons and ponds and the Comacchio valleys due to industrial effluents, fish farming and clam harvesting, respectively, whereas the Venice lagoon is now experiencing environmental recovery.

scholarly journals Sediment Carbon Variations in the Venice Lagoon and Other Transitional Water Systems of the Northern Adriatic Sea

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3430
Author(s):  
Adriano Sfriso ◽  
Alessandro Buosi ◽  
Yari Tomio ◽  
Abdul-Salam Juhmani ◽  
Stefania Chiesa ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Anthropogenic Impacts ◽  
Venice Lagoon ◽  
Total Carbon ◽  
Central Basin ◽  
Northern Adriatic Sea ◽  
Biological Origin ◽  
Northern Adriatic ◽  
High Concentrations ◽  
Shell Fragments

The concentrations of inorganic, organic and total carbon, and some sedimentary parameters (sediment density, fines, pH, and shell fragments), have been analyzed in surface sediments of the Venice Lagoon since 1987. Environmental scenarios, characterized by different anthropogenic impacts, have been considered, especially in the central basin where more information is available. Data collected in 2009 in the lagoons and ponds of Po Delta, in Comacchio Valleys and Pialassa della Baiona have been also considered and analyzed together with those recorded in the whole Venice Lagoon in 2011. The results show a strong correlation of the inorganic carbon (Cinorg) with the carbonatic or siliceous origins of the sediments and changes of both Cinorg and organic carbon (Corg) according to different anthropogenic impacts, especially eutrophication and clam-fishing activities. Higher sediment density, grain-size, and pH were associated to good-high ecological conditions and the higher presence of inorganic carbon of biological origin (shell fragments and calcified macroalgal fragments). Conversely, Corg, which is associated to eutrophic conditions, was strongly affected by the sediment disturbance and the presence of high concentrations of bivalves which enhance its consumption.

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 Variability of currents in front of the Venice Lagoon, Northern Adriatic Sea

2008 ◽  
Vol 26 (4) ◽  
pp. 731-746 ◽  
Author(s):  
S. Cosoli ◽  
M. Gačić ◽  
A. Mazzoldi
Keyword(s):  
Water Column ◽  
Wind Stress ◽  
Time Scale ◽  
Adriatic Sea ◽  
Sea Breeze ◽  
Venice Lagoon ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Modes Of Variability ◽  
Tidal Signal

Abstract. Time scales and modes of variability of the flow in the water column in the Northern Adriatic Sea for late summer 2002 are described based on current record from a single bottom-mounted ADCP in the shallow-water area in front of the Venice Lagoon. The time averaged flow was directed 277° E (CCW), roughly aligned with the coastline, with typical magnitudes in the range 4–6 cm/s and a limited, not significant clockwise veering with depth. Tidal forcing was weak and mainly concentrated in the semidiurnal frequency band, with a barotropic (depth-independent) structure. On a diurnal time scale, tidal signal was biased by the sea-breeze regime and was characterized by a clockwise veering with depth according to the Ekman spiral. A complex EOF analysis on the velocity profile time series extracted two dominant spatial modes of variability, which explained more than 90% of the total variance in the current field. More than 78% of the total variance was accounted for by the first EOF mode, with a barotropic structure that contained the low-frequency components and the barotropic tidal signal at semidiurnal and diurnal frequencies. The second mode had a baroclinic structure with a zero-crossing at mid-depth, which was related with the response of the water column to the high-frequency wind-driven diurnal sea breeze variability. The response of low-passed non-tidal currents to local wind stress was fast and immediate, with negligible temporal lag up to mid-depth. Currents vectors were pointing to the right of wind stress, as expected from the surface Ekman veering, but with angles smaller than the expected ones. A time lag in the range 10 to 11 h was found below 8 m depth, with current vectors pointing to the left of wind stress and a counterclockwise veering towards the bottom. The delay was consistent with the frictional adjustment time scale describing the dynamics of a frictionally dominated flow in shallow water, thus suggesting the importance of bottom friction on the motion over the entire water column.

scholarly journals Macrophytes: A Temporary Sink for Microplastics in Transitional Water Systems

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3032
Author(s):  
Andrea Augusto Sfriso ◽  
Yari Tomio ◽  
Abdul-Salam Juhmani ◽  
Adriano Sfriso ◽  
Cristina Munari ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Venice Lagoon ◽  
Water Systems ◽  
Specific Pattern ◽  
Fresh Weight ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Marine Macrophytes ◽  
Species Specific ◽  
A Site

Marine macrophytes are hypothesized to be a major temporary sink for microplastics. In this study, microplastic contamination was investigated in 15 macroalgal species and one seagrass from different sites in two lagoons of the northern Adriatic Sea: the Goro lagoon and the Venice lagoon. A high percentage (94%) of the macrophyte samples contained microplastics, ranging from 0.16 to 330 items g−1 fw, with the prevalent size in the range 30–90 µm and an average contamination per unit of fresh weight of 14 items g−1 fw. Microplastic contamination displayed a site-specific, rather than a species-specific, pattern of accumulation. In addition, exopolysaccharides (EPS) displayed a significant positive correlation with the microplastics ononcontamination on macrophytes acting as glue for the plastic particles available in the water column.

scholarly journals Impact of breakwater relocation on benthic biodiversity associated with seagrass meadows of northern Adriatic Sea

2018 ◽  
Vol 29 (3) ◽  
pp. 571-581 ◽  
Author(s):  
Laura Carugati ◽  
Marco Lo Martire ◽  
Cristina Gambi ◽  
Roberto Danovaro
Keyword(s):  
Adriatic Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Seagrass Meadows
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