Nauki Ścisłe i Nauki o Ziemi

Polish Polar Research


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The South Sandwich Trench located eastward of the Drake Passage in the Scotia Sea between Antarctica and South America is one of the least studied deep-sea trenches. Its geomorphological formation and present shape formed under the strong influence of the tectonic plate movements and various aspects of the geological setting (sediment thickness, faults, fracture zones and geologic lineaments). The aim of this paper is to link the geological and geophysical setting of the Scotia Sea with individual geomorphological features of the South Sandwich Trench in the context of the phenomena of its formation and evolution. Linking several datasets (GEBCO, ETOPO1, EGM96, GlobSed and marine free-air gravity raster grids, geological vector layers) highlights correlations between various factors affecting deep-sea trench formation and development using the Generic Mapping Tools (GMT) for cartographic mapping. The paper contributes to the regional studies of the submarine geomorphology in the Antarctic region with a technical application of the GMT cartographic scripting toolset.
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Autorzy i Afiliacje

Polina Lemenkova

  1. Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Bolshaya Gruzinskaya St, 10, Bld. 1, Moscow, 123995, Russian Federation


The chemical composition of recent sediments of the Vygozero Reservoir, located in the North of Europe, in the Republic of Karelia (the catchment of Arctic Ocean), has been analysed. The level of enrichment and depletion of chemical elements, including trace elements, of the sediments relative to the Clarke numbers for the continental crust has been estimated. Elevated levels of Sb, Pb, Sn, Bi, W, Cu, and other metals in the sediments of the Vygozero Reservoir have been revealed in comparison with the concentrations of these metals in the background layers of the reservoir's sediments and their content in the sediments of small lakes of the south of the Republic of Karelia. It has been established that the main factor in the accumulation of these metals in the lake is the long-distance transport of pollutants from local man-made sources located in Karelia, and from sources in neighbouring regions. In the vicinity of the town of Segezha, elevated V and Ni contents were revealed in the cores of the studied sediments, which indicates the impact on the reservoir of emissions from the fuel-oil thermal power plant. Based on the calculation of the geoaccumulation index (Igeo) and pollution load index (PLI), the level of pollution of the Vygozero Reservoir in the study areas was estimated. It was found that the northern part of the waterbody, where the settlements Segezha and Nadvoitsy and industrial enterprises associated with these towns are located, are subject to the greatest load.
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Autorzy i Afiliacje

Zakhar Slukovskii
1 2
Natalia Belkina
Maxim Potakhin

  1. Institute of the North Industrial Ecology Problems of Kola Science Center of RAS, 14a Academgorodok Street, Apatity, 184209, Russia
  2. Institute of Geology of Karelian Research Centre of RAS, 11, Pushkinskaya Street, Petrozavodsk, 185910, Russia
  3. Northern Water Problems Institute of Karelian Research Centre of RAS, 50, Alexander Nevsky Prospect, Petrozavodsk, 185030, Russia


The paper presents data on the total phenolic and flavonoid content in Deschampsia antarctica È. Desv. plants collected from natural habitats, plants cultured in vitro, regenerated plants, and plants cultivated in a growth chamber. It was found that the shoots (aerial parts) had higher phenolic and flavonoid contents compared to the roots. The largest amount of these substances was found in wild plants from Great Yalour Island. The content of phenolics and flavonoids in plants cultured in vitro was generally comparable to that in plants collected from natural habitats except for some clones. HPLC analysis revealed five main metabolites present in similar ratios in the studied samples of wild and in vitro plants. Minor substances varied slightly in different extracts, however their presence did not depend on plant growth conditions. No significant qualitative differences in HPLC profiles were found between the wild and in vitro plants. The studied samples did not contain quercetin, kaempferol and luteolin, whereas orientin was found in all studied samples of D. antarctica.
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Autorzy i Afiliacje

Maryana Twardovska
Iryna Konvalyuk
Kateryna Lystvan
Igor Andreev
Ivan Parnikoza
1 3
Viktor Kunakh

  1. Department of Cell Population Genetics, Institute of Molecular Biology and Genetics of the National Academy of Sciences of Ukraine,150 Acad. Zabolotnogo Str., 03143, Kyiv, Ukraine
  2. Department of Genetic Engineering, Institute of Cell Biology and Genetic, Engineering of the National Academy of Sciences of Ukraine, 148 Acad. Zabolotnogo Str., 03143, Kyiv, Ukraine
  3. State Institution National Antarctic Scientific Center, Ministry of Education and Science of Ukraine, 16 Shevchenko Ave., 01601, Kyiv, Ukraine

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