scholarly journals Identifying the main sources of silicate in coastal waters of the Southern Gulf of Valencia (Western Mediterranean Sea)

Oceanologia ◽  
2018 ◽  
Vol 60 (1) ◽  
pp. 52-64 ◽  
Author(s):  
Javier Sospedra ◽  
L. Felipe H. Niencheski ◽  
Silvia Falco ◽  
Carlos F.F. Andrade ◽  
Karina K. Attisano ◽  
...  
10.29007/fvpd ◽  
2018 ◽  
Author(s):  
Regina Temino-Boes ◽  
Inmaculada Romero ◽  
Rabindranarth Romero-López ◽  
María Pachés ◽  
Remedios Martinez-Guijarro

Sewage discharges through marine outfalls are an important source of nutrients to marine waters, which cause undesired impact such as eutrophication. However, few authors have evaluated the contribution of wastewater disposal to nutrient concentration in coastal waters. We estimated how wastewater treatment plant (WWTP) discharges alter ammonium concentrations in coastal waters of the Western Mediterranean Sea. Data obtained from the literature and from the local government was used to formulate a 1D mathematical model which predicts ammonium concentrations along coastal waters with current direct discharges. The estimations were validated by comparing them to measured data and a significant agreement was found (R2=0.91). Then, the simulation of a scenario with no anthropogenic direct discharges was carried out to determine how much of the excess ammonium is due to sewage inputs. The study concludes that marine outfalls are the main driver of ammonium pollution in the studied area. Near-natural conditions could be obtained by implementing tertiary treatment to reduce nitrogen in WWTP discharges. Further research should focus on the consequences of ammonium pollution for ecosystems to efficiently evaluate the ecological status of coastal waters under the Water Framework Directive and to prioritize those coastal areas in greater need of nitrogen- removing tertiary treatment.


2014 ◽  
Vol 59 (1) ◽  
Author(s):  
Salvatore Mele ◽  
Maria Pennino ◽  
Maria Piras ◽  
José Bellido ◽  
Giovanni Garippa ◽  
...  

AbstractThe metazoan parasite assemblage of the head of 30 specimens of the Atlantic chub mackerel (Scomber colias) from the western Mediterranean Sea was analysed. Eight species of parasites were found, four mazocraeid monogeneans: Grubea cochlear (prevalence = 10%), Kuhnia scombercolias (59%), K. scombri (52%), Pseudokuhnia minor (86%); three didymozoid trematodes: Nematobothrium cf. faciale (21%), N. filiforme (41%), N. scombri (7%); and one laerneopodid copepod: Clavelissa scombri (7%). Results were compared with previously published data from 14 localities of the eastern Mediterranean Sea and the Atlantic Ocean, using non-parametric univariate and multivariate analyses, and the whole parasite fauna of S. colias was compared with that of the congeners (S. australasicus, S. japonicus and S. scombrus). Parasites showed to reflect the biogeographical and phylogenetic history of host. From a methodological point of view, the use of both non-parametric univariate and multivariate techniques proved to be effective tools to detect dissimilarities between parasite assemblages.


2021 ◽  
Vol 9 (2) ◽  
pp. 208
Author(s):  
Valentina Vannucchi ◽  
Stefano Taddei ◽  
Valerio Capecchi ◽  
Michele Bendoni ◽  
Carlo Brandini

A 29-year wind/wave hindcast is produced over the Mediterranean Sea for the period 1990–2018. The dataset is obtained by downscaling the ERA5 global atmospheric reanalyses, which provide the initial and boundary conditions for a numerical chain based on limited-area weather and wave models: the BOLAM, MOLOCH and WaveWatch III (WW3) models. In the WW3 computational domain, an unstructured mesh is used. The variable resolutions reach up to 500 m along the coasts of the Ligurian and Tyrrhenian seas (Italy), the main objects of the study. The wind/wave hindcast is validated using observations from coastal weather stations and buoys. The wind validation provides velocity correlations between 0.45 and 0.76, while significant wave height correlations are much higher—between 0.89 and 0.96. The results are also compared to the original low-resolution ERA5 dataset, based on assimilated models. The comparison shows that the downscaling improves the hindcast reliability, particularly in the coastal regions, and especially with regard to wind and wave directions.


2007 ◽  
Vol 105 (1-2) ◽  
pp. 101-117 ◽  
Author(s):  
Tommaso Tesi ◽  
Stefano Miserocchi ◽  
Miguel A. Goñi ◽  
Leonardo Langone

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