Contribution to the improvement of diatom-based assessments of the ecological status of large rivers – The Sava River Case Study

2017 ◽  
Vol 605-606 ◽  
pp. 874-883 ◽  
Author(s):  
Božica Vasiljević ◽  
Snežana B. Simić ◽  
Momir Paunović ◽  
Tea Zuliani ◽  
Jelena Krizmanić ◽  
...  
Keyword(s):  
Ecological Status ◽  
Large Rivers ◽  
Sava River ◽  
The Sava River

scholarly journals Contribution to the knowledge on the distribution of freshwater sponges – the Danube and Sava rivers case study

2017 ◽  
Vol 77 (2) ◽  
Author(s):  
Stefan Andjus ◽  
Nadja Nikolic ◽  
Valerija Dobricic ◽  
Ana Marjanovic ◽  
Zoran Gacic ◽  
...  
Keyword(s):  
Danube River ◽  
Sequencing Analysis ◽  
Freshwater Sponges ◽  
The Danube River ◽  
Rdna Sequencing ◽  
Freshwater Invertebrate ◽  
Sava River ◽  
Ephydatia Fluviatilis ◽  
The Sava River

Sponges in the large rivers within the Danube River Basin (DRB) have not been adequately studied. Hence, the aim of this work was to undertake an investigation on the distribution of sponge species in the Danube and Sava rivers. Out of 88 localities covered by the study, sponges were found at 25 sites only (46 samples in total). By using morphological (light and scanning electron microscopy) and genetic (28S rDNA sequencing) analysis, four species were determined: Ephydatia fluviatilis (Linnaeus, 1759), Spongilla lacustris (Linnaeus, 1759), Eunapius fragilis (Leidy, 1851), Trochospongilla horrida Weltner, 1893. In the Danube, the predominant species was found to be E. fluviatilis making approximately 80% of collected samples, while in the Sava River S. lacustris dominated, representing 46% of the river sponges. Our work represents one of the few studies on freshwater sponges within the DRB from long stretches of the large lowland rivers (more than 2500 km of the Danube River and about 900 km of the Sava River). Moreover, molecular analysis for the identification of freshwater sponges was applied on the material collected from a wide area, thus contributing to the systematic studies on the distribution and abundance of the European freshwater invertebrate fauna in general.

The Genetic Variability (RAPD) and Genotoxicity In Vivo (Alkaline and Fpg-Modified Comet Assay) in Chub (Squalius cephalus): The Sava River Case Study

2018 ◽  
Vol 12 (5) ◽  
pp. 703-712
Author(s):  
Stoimir Kolarević ◽  
Karolina Sunjog ◽  
Margareta Kračun-Kolarević ◽  
Jovana Kostić-Vuković ◽  
Jovana Jovanović ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Comet Assay ◽  
Sava River ◽  
Squalius Cephalus ◽  
The Sava River

scholarly journals A FIRST RECORD OF EPHORON VIRGO (OLIVIER, 1791) (EPHEMEROPTERA: POLYMITARCYIDAE) FROM THE SAVA RIVER, WITH NOTES ON ITS ECOLOGICAL PREFERENCES AND RARITY OF FINDINGS IN THE REGION

2015 ◽  
Vol 13 ◽  
pp. 80-85
Author(s):  
Vanja Marković ◽  
Margareta Kračun-Kolarević ◽  
Stoimir Kolarević ◽  
Bojana Tubić ◽  
Marija Ilić ◽  
...  
Keyword(s):  
First Record ◽  
Danube River ◽  
Large Rivers ◽  
Anthropogenic Influences ◽  
Comprehensive Investigation ◽  
First Finding ◽  
Iron Gate ◽  
Grab Sample ◽  
Sava River ◽  
The Sava River

Ephoron virgo (Olivier, 1791) is an European burrowing filter-feeding mayfly species. Once common in large rivers, in XX century it became rare due to increased negative anthropogenic influences. In Serbia there was only one recent report of its presence, from the Danube River (Iron Gate area). The aim of this paper is to report on the first finding of E. virgo from the Sava River, and to discuss its scarce findings in the region. Three larval specimens were found in the Belgrade region in grab sample taken in 2014. In order to assess the development of the population in the region, a comprehensive investigation should be conducted.

scholarly journals Lost Energy of Water Spilled over Hydropower Dams

2021 ◽  
Vol 13 (16) ◽  
pp. 9119
Author(s):  
Andrej Predin ◽  
Matej Fike ◽  
Marko Pezdevšek ◽  
Gorazd Hren
Keyword(s):  
Power Plants ◽  
Flood Events ◽  
Energy Potential ◽  
Climate Conditions ◽  
Hydropower Plants ◽  
Hydropower Dams ◽  
Sava River ◽  
Analytical Assessment ◽  
The Sava River

The present paper presents a view of water spilled over hydropower plants as an energy loss. In the current climate conditions, flood events are becoming more frequent due to human impact on the environment; water spills are also more frequent, which means more and more energy is lost. How much water is spilled and, consequently, how much energy is lost is shown in the present article on the chain of power plants on the Sava River in the five years from 2015 to 2019. An analytical assessment of the current situation in the lock was carried out, which showed that the available water through the locks could be used efficiently. The paper presents a case study of one overflow event lasting 48 h. The calculated theoretical losses of energy (of spilled water) and possible technical implementation for capturing losses are given. The proposed technical implementation is based on established technology, so we could expect that the approach is feasible. The results show that the estimated spilled water energy potential reaches about 40% of the actual spilled water or energy lost.

scholarly journals Influence of Anthropogenic Loads on Surface Water Status: A Case Study in Lithuania

2021 ◽  
Vol 13 (8) ◽  
pp. 4341
Author(s):  
Laima Česonienė ◽  
Daiva Šileikienė ◽  
Vitas Marozas ◽  
Laura Čiteikė
Keyword(s):  
Total Nitrogen ◽  
Water Status ◽  
Arable Land ◽  
Ecological Status ◽  
Water Bodies ◽  
Agricultural Pollution ◽  
Good Ecological Status ◽  
Water Catchment ◽  
Lake Basins

Twenty-six water bodies and 10 ponds were selected for this research. Anthropogenic loads were assessed according to pollution sources in individual water catchment basins. It was determined that 50% of the tested water bodies had Ntotal values that did not correspond to the good and very good ecological status classes, and 20% of the tested water bodies had Ptotal values that did not correspond to the good and very good ecological status classes. The lake basins and ponds received the largest amounts of pollution from agricultural sources with total nitrogen at 1554.13 t/year and phosphorus at 1.94 t/year, and from meadows and pastures with total nitrogen at 9.50 t/year and phosphorus at 0.20 t/year. The highest annual load of total nitrogen for lake basins on average per year was from agricultural pollution from arable land (98.85%), and the highest total phosphorus load was also from agricultural pollution from arable land (60%).

scholarly journals Determination of Cd, Pb and As in sediments of the Sava river by electrothermal atomic absorption spectrometry

2010 ◽  
Vol 75 (1) ◽  
pp. 113-128 ◽  
Author(s):  
Simona Murko ◽  
Radmila Milacic ◽  
Marjan Veber ◽  
Janez Scancar
Keyword(s):  
Nitric Acid ◽  
Analytical Procedure ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Magnesium Nitrate ◽  
Matrix Modifier ◽  
Reliable Determination ◽  
Sava River ◽  
The Sava River

The applicability of nitric acid, palladium nitrate and a mixture of palladium and magnesium nitrate as matrix modifiers was estimated for the accurate and reproducible determination of cadmium (Cd), lead (Pb) and arsenic (As) in sediments of the Sava River by electrothermal atomic absorption spectrometry, ETAAS. Decomposition of the samples was done in a closed vessel microwave-assisted digestion system using nitric, hydrochloric and hydrofluoric acids, followed by the addition of boric acid to convert the fluorides into soluble complexes. The parameters for the determination of Cd, Pb and As in sediments were optimized for each individual element and for each matrix modifier. In addition, two sediment reference materials were also analyzed. In determination of Cd and Pb, nitric acid was found to be the most appropriate matrix modifier. The accurate and reliable determination of Cd and Pb in sediments was possible also in the presence of boric acid. The use of a mixture of palladium and magnesium nitrate efficiently compensated for matrix effects and enabled the accurate and reliable determination of As in the sediments. Quantification of Cd and As was performed by calibration using acid matched standard solutions, while the standard addition method was applied for the quantification of Pb. The repeatability of the analytical procedure for the determination of Cd, Pb and As in sediments was ?5 % for Cd, ?4 % for Pb and ?2 % for As. The LOD values of the analytical procedure were found to be 0.05 mg/kg for Cd and 0.25 mg/kg for Pb and As, while the LOQ values were 0.16 mg/kg for Cd and 0.83 mg/kg for Pb and As. Finally, Cd, Pb and As were successfully determined in sediments of the Sava River in Slovenia.

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