The Experts below are selected from a list of 2277 Experts worldwide ranked by ideXlab platform
Christoph Vorburger - One of the best experts on this subject based on the ideXlab platform.
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fish population genetic structure shaped by Hydroelectric Power plants in the upper rhine catchment
Evolutionary Applications, 2016Co-Authors: Alexandre Gouskov, Marta Reyes, Lisa Wirthnerbitterlin, Christoph VorburgerAbstract:The Rhine catchment in Switzerland has been transformed by a chain of Hydroelectric Power Stations. We addressed the impact of fragmentation on the genetic structure of fish populations by focusing on the European chub (Squalius cephalus). This fish species is not stocked and copes well with altered habitats, enabling an assessment of the effects of fragmentation per se. Using microsatellites, we genotyped 2133 chub from 47 sites within the catchment fragmented by 37 Hydroelectric Power Stations, two weirs and the Rhine Falls. The shallow genetic population structure reflected drainage topology and was affected significantly by barriers to migration. The effect of Power Stations equipped with fishpasses on genetic differentiation was detectable, albeit weaker than that of man-made barriers without fishpasses. The Rhine Falls as the only long-standing natural obstacle (formed 14 000 to 17 000 years ago) also had a strong effect. Man-made barriers also exacerbated the upstream decrease in allelic diversity in the catchment, particularly when lacking fishpasses. Thus, existing fishpasses do have the desired effect of mitigating fragmentation, but barriers still reduce population connectivity in a fish that traverses fishpasses better than many other species. Less mobile species are likely to be affected more severely.
Alexandre Gouskov - One of the best experts on this subject based on the ideXlab platform.
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fish population genetic structure shaped by Hydroelectric Power plants in the upper rhine catchment
Evolutionary Applications, 2016Co-Authors: Alexandre Gouskov, Marta Reyes, Lisa Wirthnerbitterlin, Christoph VorburgerAbstract:The Rhine catchment in Switzerland has been transformed by a chain of Hydroelectric Power Stations. We addressed the impact of fragmentation on the genetic structure of fish populations by focusing on the European chub (Squalius cephalus). This fish species is not stocked and copes well with altered habitats, enabling an assessment of the effects of fragmentation per se. Using microsatellites, we genotyped 2133 chub from 47 sites within the catchment fragmented by 37 Hydroelectric Power Stations, two weirs and the Rhine Falls. The shallow genetic population structure reflected drainage topology and was affected significantly by barriers to migration. The effect of Power Stations equipped with fishpasses on genetic differentiation was detectable, albeit weaker than that of man-made barriers without fishpasses. The Rhine Falls as the only long-standing natural obstacle (formed 14 000 to 17 000 years ago) also had a strong effect. Man-made barriers also exacerbated the upstream decrease in allelic diversity in the catchment, particularly when lacking fishpasses. Thus, existing fishpasses do have the desired effect of mitigating fragmentation, but barriers still reduce population connectivity in a fish that traverses fishpasses better than many other species. Less mobile species are likely to be affected more severely.
Nicolae Fani Iordan - One of the best experts on this subject based on the ideXlab platform.
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hydroPower development in romania a review from its beginnings to the present
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Gabriel Năstase, Alexandru şerban, Alina Florentina Năstase, George Dragomir, Alin Ionuţ Brezeanu, Nicolae Fani IordanAbstract:Abstract Water is a prime element both for sustaining life on Earth and for complex human activity. In 2015 in Romania the average electricity production was of 7343 MW h and the average consumption was of 6590 MW h. The average hydroPower generated was of 1894 MW h, which is equal to 26% of the total production. In this paper, we aim at reviewing the hydroPower system in Romania from its beginnings, in 1884, to its present development. The first hydroPower plant in Romania was in Sinaia and had an installed capacity of 4×250 kW. Now, Romania has more than 200 HPPs, with a total installed capacity of 6.443 MW. In Romania, hydroPower is the first main source of energy among RES, followed by wind energy. Between 1950 and 1990 were built 115 hydroPower Stations. This period is characterized by the construction of most of the Hydroelectric Power plants in Romania, including the largest. The development of the hydro potential has begun in Bistrița basin. After 1990, in the transition period, after the fall of communism, the number of installed hydroPower plants decreased, by 2010 totaling an installed capacity of only 838 MW, which means less than 14% of what was done before 1990. About 54% of Romania's hydroPower potential is now arranged, and there are plans to reach 63.5% by 2025. The largest artificial lake of Romania is Lake Iron Gates I (Porțile de Fier I), constructed between 1964 and 1972 behind a 60 m’ dam. Iron Gate I rank position 52 out of 66, in the list of largest Hydroelectric Power Stations in the world. Iron Gates I system is one of the largest hydro constructions in Europe and the largest on the Danube.
R A Zakhidov - One of the best experts on this subject based on the ideXlab platform.
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experience and possibilities of using energy resources of water reservoirs for a complex purpose located in an arid zone part ii
Applied Solar Energy, 2018Co-Authors: U A Tadjiev, E I Kiseleva, R A ZakhidovAbstract:This paper shows the dependence of the energy indicators of advanced HPSs at reservoirs built for a complex purpose that are located in an arid zone on the genesis of feeding rivers, hydrological regimes, and water use. It reveals the possibility of increasing the reliability of the electric Power supply of the reservoirs and prospective Hydroelectric Power Stations (HPSs) in them by wind Power plants (WPPs) using the wind energy in the zone of the reservoirs.
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on the possibility of enhancement of energy efficiency of Hydroelectric Power Stations at irrigative reservoirs by wind Power superposed plants part 1
Applied Solar Energy, 2011Co-Authors: U A Tadzhiev, E I Kiseleva, M U Tadzhiev, R A ZakhidovAbstract:The effect of hydrological regimes on the energy datum variability in the operation of Hydroelectric Power Stations at irrigative reservoirs is shown.
Maage Amund - One of the best experts on this subject based on the ideXlab platform.
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Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway
'Elsevier BV', 2019Co-Authors: Azad Atabak, Frantzen Sylvia, Bank Michael, Johnsen Ingrid, Tessier Emmanuel, Amouroux David, Madsen Lise, Maage AmundAbstract:International audienceHardangerfjord is one of the longest fjords in the world and has historical mercury (Hg) contamination from a zinc plant in its inner sector. In order to investigate the extent of Hg transferred to abiotic and biotic ecosystem compartments, Hg and monomethylmercury (MeHg) concentrations were measured in seawater, sediment, and seafood commonly consumed by humans. Although total mercury in seawater has been described previously, this investigation reports novel MeHg data for seawater from Norwegian fjords. Total Hg and MeHg concentrations in seawater, sediment, and biota increased towards the point source of pollution (PSP) and multiple lines of evidence show a clear PSP effect in seawater and sediment concentrations. In fish, however, similar high concentrations were found in the inner part of another branch adjacent to the PSP. We postulate that, in addition to PSP, atmospheric Hg, terrestrial run-off and Hydroelectric Power Stations are also important sources of Hg in this fjord ecosystem. Hg contamination gradually increased towards the inner part of the fjord for most fish species and crustaceans. Since the PSP and the atmospheric Hg pools were greater towards the inner part of the fjord, it is not entirely possible to discriminate the full extent of the PSP and the atmospheric Hg contribution to the fjord food web. The European Union (EU) Hg maximum level for consumption was exceeded in demersal fish species including tusk (Brosme brosme), blue ling (Molva dypterygia) and common ling (Molva molva) from the inner fjord (1.08 to 1.89 mg kg−1 ww) and from the outer fjord (0.49 to 1.07 mg kg−1 ww). Crustaceans were less contaminated and only European lobster (Homarus gammarus) from inner fjord exceeded the EU limit (0.62 mg kg−1 ww). Selenium (Se) concentrations were also measured in seafood species and Se-Hg co-exposure dynamics are also discussed
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Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway
2019Co-Authors: Mahjour Azad Atabak, Frantzen Sylvia, Bank Michael, Tessier Emmanuel, Amouroux David, Madsen Lise, Johnsen, Ingrid Askeland, Maage AmundAbstract:Hardangerfjord is one of the longest fjords in the world and has historical mercury (Hg) contamination from a zinc plant in its inner sector. In order to investigate the extent of Hg transferred to abiotic and biotic ecosystem compartments, Hg and monomethylmercury (MeHg) concentrations were measured in seawater, sediment, and seafood commonly consumed by humans. Although total mercury in seawater has been described previously, this investigation reports novel MeHg data for seawater from Norwegian fjords. Total Hg and MeHg concentrations in seawater, sediment, and biota increased towards the point source of pollution (PSP) and multiple lines of evidence show a clear PSP effect in seawater and sediment concentrations. In fish, however, similar high concentrations were found in the inner part of another branch adjacent to the PSP. We postulate that, in addition to PSP, atmospheric Hg, terrestrial run-off and Hydroelectric Power Stations are also important sources of Hg in this fjord ecosystem. Hg contamination gradually increased towards the inner part of the fjord for most fish species and crustaceans. Since the PSP and the atmospheric Hg pools were greater towards the inner part of the fjord, it is not entirely possible to discriminate the full extent of the PSP and the atmospheric Hg contribution to the fjord food web. The European Union (EU) Hg maximum level for consumption was exceeded in demersal fish species including tusk (Brosme brosme), blue ling (Molva dypterygia) and common ling (Molva molva) from the inner fjord (1.08 to 1.89 mg kg−1 ww) and from the outer fjord (0.49 to 1.07 mg kg−1 ww). Crustaceans were less contaminated and only European lobster (Homarus gammarus) from inner fjord exceeded the EU limit (0.62 mg kg−1 ww). Selenium (Se) concentrations were also measured in seafood species and Se-Hg co-exposure dynamics are also discussed.publishedVersio
