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Day plots of bacterial magnetite from sediments of shira lake (Khakassia, Russia) / S. V. Semenov [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 2. - P252-256, DOI 10.17516/1997-1397-2017-10-2-252-256 . - ISSN 1997-1397
Кл.слова (ненормированные):
Bacterial magnetite -- Magnetic hysteresis -- Nanoparticles
Аннотация: The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles (< 100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene. © Siberian Federal University. All rights reserved.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Akademgorodok, 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Semenov, S. V.; Balaev, D. A.; Shaykhutdinov, K. A.; Rogozin, D. Y.

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Gamma irradiation of resting eggs of Moina macrocopa affects individual and population performance of hatchlings / E. Zadereev [et al.] // J. Environ. Radioact. - 2017. - Vol. 175-176. - P126-134, DOI 10.1016/j.jenvrad.2017.05.002 . - ISSN 0265-931X
Кл.слова (ненормированные):
Cladocera -- Life cycle parameters -- Population performance -- Resting eggs -- ?-radiation -- Gamma rays -- Irradiation -- Life cycle -- Radiation effects -- Radioactive materials -- Sediments -- Cladocera -- Cycle parameters -- Dose response relationships -- Population performance -- Reproductive rates -- Resting eggs -- Sensitive parameter -- Zooplankton communities -- Radiation -- adolescent -- Cladocera -- contamination -- controlled study -- dose response -- female -- gamma irradiation -- gamma radiation -- hatchling -- human -- human experiment -- life cycle -- Moina macrocopa -- newborn -- nonhuman -- sediment -- zooplankton -- Animalia -- Cladocera -- Moina macrocopa
Аннотация: We investigated the effects of ?-radiation on the survival of resting eggs of the cladoceran Moina macrocopa, on the parameters of the life cycle of neonates hatched from the irradiated eggs and on the performance of the population initiated from irradiated eggs. The study showed that ?-radiation in a range of doses from the background level to 100 Gy had no effect on survival of irradiated eggs. The absorbed dose of 200 Gy was lethal to resting eggs of M. macrocopa. The number of clutches and net reproductive rate (R0) of hatchlings from eggs exposed to radiation were the strongly affected parameters in experiments with individual females. The number of clutches per female was drastically reduced for females hatched from egg exposed to 80–100 Gy. The most sensitive parameter was the R0. The estimated ED50 for the R0 (effective dose that induces 50% R0 reduction) was 50 Gy. Population performance was also affected by the irradiation of the resting stage of animals that initiated population. Populations that was initiated from hatchlings from resting eggs exposed to 100 Gy was of smaller size and with fewer juvenile and parthenogenetic females in comparison with control populations. Thus, we determined the dose-response relationship for the effect of gamma radiation on survival of resting eggs and individual and population responses of hatchlings from irradiated resting eggs. We conclude that for highly polluted areas contamination of bottom sediments with radioactive materials could affect zooplankton communities through adverse chronic effects on resting eggs, which will be transmitted to hatchlings at individual or population levels. © 2017 Elsevier Ltd

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Держатели документа:
Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodniy Ave., Krasnoyarsk, Russian Federation
Budker Institute of Nuclear Physics, 11 Akademika Lavrent'eva Ave., Novosibirsk, Russian Federation

Доп.точки доступа:
Zadereev, E.; Lopatina, T.; Oskina, N.; Zotina, T.; Petrichenkov, M.; Dementyev, D.

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Development of human exometabolite deep mineralization method for closed ecosystems / A. A. Tikhomirov [et al.] // Dokl. Biochem. Biophys. - 2016. - Vol. 470, Is. 1. - P316-318, DOI 10.1134/S1607672916050021. - Cited References:9. - The study was supported by the Russian Science Foundation (project no. 14-14-00599). . - ISSN 1607-6729. - ISSN 1608-3091

РУБ Biochemistry & Molecular Biology + Biophysics

Аннотация: Methods of physicochemical further oxidation of hardly soluble sediment obtained from "wet combustion" of human exometabolites applied to space-purpose Bio Technological Life Support Systems (BTLLS) were studied. Most hardly dissoluble sediment containing Ca, P, Mg, and other essential plant nutrition elements were shown to dissolve in H2O2 and HNO3 aqueous media activated by alternating electric current. Dissolved additional mineral elements allowed (as demonstrated for lettuce) to increase the productivity of BTLLS phototrophic unit plants more than twice, which is comparable to their productivity on standard Knop solution with balanced chemical composition. Thus, dissolved mineral elements can be involved into BTLLS turnover process and increase its closure degree.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tikhomirov, A. A.; Trifonov, S. V.; Morozov, E. A.; Kudenko, Yu. A.; Kalacheva, G. S.; Ushakova, S. A.; Russian Science Foundation [14-14-00599]

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Disturbance of meromixis in saline Lake Shira (Siberia, Russia): Possible reasons and ecosystem response / D. Y. Rogozin [et al.] // Limnologica. - 2017. - Vol. 66. - P12-23, DOI 10.1016/j.limno.2017.06.004. - Cited References:43. - We acknowledge the financial support by the Russian Foundation for Basic Research, grant No 16-05-00091. The research was partially supported by the Council on grants from the President of the Russian Federation for support of leading scientific schools (grant NSh-9249.2016.5). Many thanks to colleagues from analytical laboratory of Institute of Biophysics SB RAS for sulphide determination. We thank the employees of Middle Siberian Department of Russian Hydro Meteorological Service in Krasnoyarsk for providing the data on weather and Lake Shira level. We are grateful to Dr. Martin Schmid and two anonymous reviewers for valuable comments which helped us to improve the article considerably. . - ISSN 0075-9511. - ISSN 1873-5851

РУБ Limnology
Рубрики:
SHUNET SOUTH SIBERIA
   MEROMICTIC LAKE
   VERTICAL STRATIFICATION
   WINTER
Кл.слова (ненормированные):
Meromixis -- Mixolimnion -- Stratification -- Stability -- Mixing -- Food chain -- Purple sulfur bacteria
Аннотация: Saline Lake Shira (Southern Siberia, Russia) was meromictic through the observation period 2002-2015. During the under-ice periods of 2015 and 2016, complete mixing of the water column was recorded for the first time, and hydrogen sulphide temporarily disappeared from the water column of the lake; i.e. in those years the lake turned to holomixis. In the summer of 2015, a sharp increase in chlorophyll a, organic carbon, zooplankton, and phytoflagellates was observed in the lake, which was probably due to the release of nutrients from the monimolimnion. Purple sulfur bacteria completely disappeared from the lake after the first mixing in 2015, and did not reappear despite the restoration of meromixis in 2017. Thus, it was demonstrated that purple sulfur bacteria are sensitive to the weakening of the stratification of Lake Shira. Based on the data of the seasonal monitoring of temperature and salinity profiles over the period 2002-2017, it was presumed that the main cause of deep mixing in 2015 was the weakening of the salinity gradient due to strong wind impact and early ice retreat in the spring of 2014. In addition, it was shown that in previous years a significant contribution to the maintenance of meromixis was made by an additional influx of fresh water, which caused a rise in the lake level in the period 2002-2007. Thus, we identified a relationship between the stratification regime of the lake and the change in its level, which provides valuable information both for the forecast of Water quality and for reconstruction of the Holocene climate humidity in this region of Southern Siberia from the sediment cores of Lake Shira.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Akademgorodok 50-50, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Comp Modeling, Akademgorodok 50-44, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Rogozin, D. Y.; Tarnovsky, M. O.; Belolipetskii, V. M.; Zykov, V. V.; Zadereev, E. S.; Tolomeev, A. P.; Drobotov, A. V.; Barkhatov, Y. V.; Gaevsky, N. A.; Gorbaneva, T. B.; Kolmakova, A. A.; Degermendzhi, A. G.; Russian Foundation for Basic Research [16-05-00091]; Russian Federation [NSh-9249.2016.5]

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Feasibility of incorporating all products of human waste processing into material cycling in the btlss / Ye. A. Morozov [et al.] // Proceedings of the International Astronautical Congress, IAC. - 2017. - Vol. 4: 68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017 (25 September 2017 through 29 September 2017, ) Conference code: 136635. - P2143-2149
Кл.слова (ненормированные):
BTLSS -- Closure -- Cycling -- Hydroponics -- Nutrient availability -- Sediment -- Dissolution -- Energy efficiency -- Irrigation -- Life support systems (spacecraft) -- Plant shutdowns -- Sediments -- Space applications -- Waste incineration -- BTLSS -- Closure -- Cycling -- Hydroponics -- Nutrient availability -- Nutrients
Аннотация: The present study addresses the ways to increase the closure of biotechnical life support systems (BTLSS) for space applications. A promising method of organic waste processing based on wet combustion in hydrogen peroxide developed at the IBP SB RAS to produce fertilizers for higher plants is discussed. The method is relatively compact, energy efficient, productive, and eco-friendly. However, about 4-6 g/L of recalcitrant sediment containing such essential nutrients as Ca, Mg, P, Fe, Cu, Mn, and Zn precipitates after the initial process. These elements are unavailable to plants grown hydroponically, thus dropping out of the cycling as deadlock products. Possible methods of dissolving that sediment have been studied. Results of experiments show that the most promising method is additional oxidation of the sediment in HNO3 + H2O2. By using the new technological process, which only involves substances synthesized inside the BTLSS material flows, more than 90% of each nutrient can be converted into the available form in irrigation solutions, thus returning them into the material cycling. The efficiency of irrigation solutions beneficiated with the mineral nutrients after the sediment dissolution has been shown. Lettuce plants grown as the test object on the newly prepared irrigation solutions produced the yield that was higher more than twice compared to the nutrient solutions prepared without the sediment conversion into a soluble state. Composition of the gases emitted during this process has been analysed. Dynamics of oxidation of small fractions of a wax-like sediment remaining after its dissolution in the BTLSS soil-like substrate has been studied. In conclusion, the entire technological chain aimed at inclusion of deadlock products of human waste wet combustion into the BTLSS cycling has been suggested and discussed. © 2017 by the International Astronautical Federation (IAF). All rights reserved.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center, Krasnoyarsk Science Center SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31 "Krasnoyarskiy Rabochiy" Ave., Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Morozov, Ye. A.; Trifonov, S. V.; Ushakova, S. A.; Anishchenko, O. V.; Tikhomirov, A. A.

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Feasibility of incorporating all products of human waste processing into material cycling in the BTLSS / Y. A. Morozov [et al.] // Life Sci. Space Res. - 2018. - Vol. 18. - P29-34, DOI 10.1016/j.lssr.2018.05.002 . - ISSN 2214-5524
Кл.слова (ненормированные):
BTLSS -- Closure -- Cycling -- Hydroponics -- Nutrient availability -- Sediment
Аннотация: The present study addresses the ways to increase the closure of biotechnical life support systems (BTLSS) for space applications. A promising method of organic waste processing based on “wet combustion” in hydrogen peroxide developed at the IBP SB RAS to produce fertilizers for higher plants is discussed. The method is relatively compact, energy efficient, productive, and eco-friendly. However, about 4–6 g/L of recalcitrant sediment containing such essential nutrients as Ca, Mg, P, Fe, Cu, Mn, and Zn precipitates after the initial process. These elements are unavailable to plants grown hydroponically and, thus, drop out of the cycling as dead-end products. Possible methods of dissolving that sediment have been studied. Results of experiments show that the most promising method is additional oxidation of the sediment in HNO3 + H2O2. By using the new technological process, which only involves substances synthesized inside the BTLSS material flows, more than 90% of each nutrient can be converted into the form available to plants in irrigation solutions, thus returning them into the material cycling. The results obtained in this study show the efficacy of supplementing the irrigation solutions with the mineral nutrients after sediment dissolution. Lettuce plants grown as the test object on the newly prepared irrigation solutions produced the yield that was more than twice higher than the yield produced on the nutrient solutions prepared without the sediment conversion into a soluble form. Composition of the gases emitted during this process has been analyzed. Dynamics of oxidation of the small fractions of a wax-like sediment remaining after the initial sediment dissolution in HNO3 + H2O2 in the BTLSS soil-like substrate has been studied. The entire technological scheme aimed at the full inclusion of all human wastes into the BTLSS cycling has been suggested and discussed. A process scheme of including products of human waste processing in the biotic cycle of the BTLSS is discussed in the conclusion. © 2018 The Committee on Space Research (COSPAR)

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center” SB RAS, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31 “Krasnoyarskiy Rabochiy” Ave., Krasnoyarsk, Russian Federation

Доп.точки доступа:
Morozov, Y. A.; Trifonov, S. V.; Ushakova, S. A.; Anishchenko, O. V.; Tikhomirov, A. A.

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Effects of water column processes on the use of sediment traps to measure zooplankton non-predatory mortality: a mathematical and empirical assessment / O. P. Dubovskaya [et al.] // J. Plankton Res. - 2018. - Vol. 40, Is. 1. - P91-106, DOI 10.1093/plankt/fbx066. - Cited References:49. - This work was a part of the joint German-Russian Project "Mortality of Zooplankton in lake ecosystems and its potential contribution to carbon mineralization in pelagic zone" supported by the German Research Foundation (DFG no. GR-1540/29-1) and the Russian Foundation for Basic Research (RFBR no. 16-54-12048). The work also was partly supported by Russian Federal Tasks of Fundamental Research (project no. 51.1.1) and by grant (no. 9249.2016.5) from the RF President Council on Grants for leading RF scientific schools. . - ISSN 0142-7873. - ISSN 1464-3774

РУБ Marine & Freshwater Biology + Oceanography
Рубрики:
NONCONSUMPTIVE MORTALITY
CRUSTACEAN ZOOPLANKTON
VERTICAL-DISTRIBUTION
Кл.слова (ненормированные):
zooplankton -- Arctodiaptomus salinus -- non-predatory mortality -- sediment -- trap -- carcasses -- stratified lake
Аннотация: Zooplankton populations can at times suffer mass mortality due to non-predatory mortality (NPM) factors, and the resulting carcasses can be captured by sediment traps to estimate NPM rate. This approach assumes sinking to be the primary process in removing carcasses, but in reality, carcasses can also be removed by ingestion, turbulent mixing and microbial degradation in the water column. We present mathematical formulations to calculate NPM from sediment trap data by accounting for carcass removal by processes in addition to sinking, and demonstrate their application in a study in Lake Shira, Russia. Carcass abundance of the major calanoid copepod Arctodiaptomus salinus decreased with depth, indicating the effect of carcass removal from the water column. The estimated NPM values (0.0003-0.103 d(-1)) were comparable with previously reported physiological death rates. We further used independent data to partition carcass removal due to detritivory, turbulent mixing and microbial degradation. Estimated ingestion by the amphipod Gammarus lacustris could account for the disappearance of copepod carcasses above the traps. Wind-driven turbulence could also extend the carcass exposure time to microbial degradation. Collectively, these water column processes would facilitate the remineralization of carcasses in the water column, and diminish the carcass carbon flux to the benthos.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Inst Biophys,Fed Res Ctr,Dept Expt Hydroecol, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, 79 Svobodny Ave, Krasnoyarsk 660041, Russia.
Leibniz Inst Freshwater Ecol & Inland Fisherie, Dept Ecohydrol, Muggelseedamm 310, D-12587 Berlin, Germany.
Natl Acad Sci Belarus Bioresources, Pract Ctr, Dept Hydrobiol, 27 Acad Skaya St, Minsk 220072, Byelarus.
Swansea Univ, Dept Biosci, Singleton Pk, Swansea SA2 8PP, W Glam, Wales.

Доп.точки доступа:
Dubovskaya, Olga P.; Tolomeev, Aleksandr P.; Kirillin, Georgiy; Buseva, Zhanna; Tang, Kam W.; Gladyshev, Michail I.; German Research Foundation (DFG) [GR-1540/29-1]; Russian Foundation for Basic Research (RFBR) [16-54-12048]; Russian Federal Tasks of Fundamental Research [51.1.1]; RF President Council on Grants for leading RF scientific schools [9249.2016.5]

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Analysis of diatom algae from the water column and bottom sediments of Shira Lake (Khakassia, Russia) [Text] / G. N. Bolobanschikova [et al.] // Contemp. Probl. Ecol. - 2015. - Vol. 8, Is. 2. - P173-185, DOI 10.1134/S1995425515020031. - Cited References:21. - This work was supported by Russian Foundation for Basic Research, project no. 13-05-00429-a and the Biodiversity Program for Basic Research, Russian Academy of Sciences, project no. 30.8. . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology

Кл.слова (ненормированные):
paleolimnology -- diatom algae -- meromictic lake -- sedimentation -- Cyclotella -- choctawhatcheeana -- Aulacoseira valida -- Aulacoseira ambigua
Аннотация: Lake Shira as a meromictic lake is object of interest for paleolimnological studies. In May 2011 core samples were collected from the bottom of Lake Shira and the species composition of diatom algae, which serve as bioindicators of the state of the lake, were studied. In addition, in 2012, seasonal water samples and material from sediment traps were collected and the species composition of diatoms in them was analyzed. The results of the analysis showed that the lake, like in previous years of research, was dominated by Cyclotella choctawhatcheeana Prasad. Diatoms were found twice in the studied core above the white carbonate layers and were absent in other layers. The species living in the lake at present were observed down to the first white carbonate layer, including the predominant Cyclotella choctawhatcheeana. This fact presumably proves the consistency of the species composition of diatoms and the overall stable condition of the lake since 1946 (Rogozin et al., 2005). Down to the second white carbonate layer, the dominant species were Aulcosira valida (Grunow) Krammer and Aulcosira italica (Grunow) Simonsen. Nitzchia sigmodea (Nitzsch) W. Smith and Fragilaria construens var. venter (Ehrenberg) Grunow were also observed at these depths, dating approximately to 1655-1690. These are freshwater species that belong to the diatoms of arctic, alpine, and temperate latitudes, which develop in shallow waters under moderate temperature conditions. This fact suggests that Lake Shira was less salty in the middle and end of the 17th century than today.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Limnol Inst, Siberian Branch, Irkutsk 664033, Russia.
Krasnoyarsk State Med Univ, Krasnoyarsk 660022, Russia.
Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bolobanschikova, G. N.; Rogozin, D. Yu.; Firsova, A. D.; Rodionova, E. V.; Degermendzhy, N. N.; Shabanov, A. V.; Russian Foundation for Basic Research [13-05-00429-a]; Biodiversity Program for Basic Research, Russian Academy of Sciences [30.8]

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Tracing the North Atlantic decadal-scale climate variability in a late Holocene pollen record from southern Siberia / S. Hildebrandt [et al.] // Palaeogeogr. Palaeoclimatol. Palaeoecol. - 2015. - Vol. 426. - P75-84, DOI 10.1016/j.palaeo.2015.02.037 . - ISSN 0031-0182
Кл.слова (ненормированные):
Atlantic Multidecadal Oscillation -- Human impact -- Lake level -- Late Holocene -- Non-pollen palynomorphs -- Pollen -- Siberia
Аннотация: This paper presents a new palynological record from a 146. cm long finely laminated sediment core obtained in 2009 from the deep-water meromictic Lake Shira (54°30'38'N, 90°12''09'E; ca. 353. m. a.s.l.) situated in the Khakassian steppe region of southern Siberia between the rivers Ob' and Yenisei. The area is rich in lakes and represents an exceptionally well preserved sequence of Bronze and Iron Age archeological cultures. Little is known about the changes in vegetation and climate of the region during the Holocene. The palynological analysis of the core allows us to partly fill up this gap in current knowledge. The record of pollen and non-pollen palynomorphs presented here covers the past 2450. year interval with an average resolution of 22. years. The results obtained support the interpretation that the late Holocene vegetation changes around Lake Shira are mainly associated with large-scale atmospheric circulation processes controlling the regional water balance rather than with human activities. An attempt to trace human impact in the pollen assemblages provides no clear evidence for anthropogenic activity, except for the last few decades since ca. 1955, though the region has a long history of mobile pastoralists. For explanation of decadal-scale changes in the regional vegetation cover, the Artemisia/Chenopodiaceae (A/C) pollen ratio proved to be a reliable indicator of effective moisture availability. Using available fossil and published instrumental data our study suggests a link between the North Atlantic warmer/colder temperatures and higher/lower atmospheric precipitation (or moisture availability) in southern Siberia at multi-decadal to centennial scales. © 2015 Elsevier B.V.

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Держатели документа:
Institute of Geological Sciences, Palaeontology, Free University Berlin, Malteserstra?e 74-100, Building DBerlin, Germany
Siberian Branch of Russian Academy of Sciences, Institute of Geology and Mineralogy, Prospekt akademika Koptyuga 3Novosibirsk, Russian Federation
Eurasia Department/Beijing Branch Office, German Archaeological Institute, Im Dol 2-6Berlin, Germany
Siberian Branch of Russian Academy of Sciences, Institute of Biophysics, Akademgorodok 50, str. 50Krasnoyarsk, Russian Federation
ИБФ СО РАН

Доп.точки доступа:
Hildebrandt, S.; Muller, S.; Kalugin, I.A.; Dar'in, A.V.; Wagner, M.; Rogozin, D.Y.; Tarasov, P.E.

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10.

Tritium in surface waters of the Yenisei River basin [Text] / A. Y. Bolsunovsky, L. G. Bondareva // J. Environ. Radioact. - 2003. - Vol. 66, Is. 3. - P. 285-294, DOI 10.1016/S0265-931X(02)00132-7. - Cited References: 11 . - ISSN 0265-931X

РУБ Environmental Sciences

Кл.слова (ненормированные):
tritium -- Yenisei River basin -- surface and ground waters -- nuclear reactor -- deep-well injection of radionuclides
Аннотация: This paper reports an investigation of the tritium content in the surface waters of the Yenisei River basin near the Mining and Chemical Combine (MCC). In 2001 the maximum tritium concentration in the Yenisei River did not exceed 4 +/- 1 Bq l(-1), which is consistent with the data of 1998-99. However, it has been found that there are surface waters containing enhanced tritium as compared with the background values for the Yenisei River. For instance, in the Ploskii Stream and the Shumikha River the maximum tritium concentrations amount to 168 and 81 Bq l(-1), respectively. The source of tritium in these surface waters is the last operating reactor at the MCC, which still uses the Yenisei water as coolant. In water and sediment samples of the Bolshaya Tel River (a tributary of the Yenisei River) the tritium content turned out to be at least 10 times higher than the background values for the Yenisei River. The measurements conducted at the RPA RADON (Moscow) revealed not only tritium but also the artificial radionuclide C-14 in the Bolshaya Tel samples. The data obtained suggest that the Bolshaya Tel River receives the major part of tritium from sediments rather than from the water catchment area. This allows the conclusion that there is water exchange between the surface waters and the radioactively contaminated underground horizons of the "Severny" testing site. (C) 2002 Elsevier Science Ltd. All rights reserved.

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Держатели документа:
RAS, SB, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovsky, A.Y.; Bondareva, L.G.

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11.

Estimating In Situ Zooplankton Non-Predation Mortality in an Oligo-Mesotrophic Lake from Sediment Trap Data: Caveats and Reality Check [Text] / O. P. Dubovskaya [et al.] // PLoS One. - 2015. - Vol. 10, Is. 7. - Ст. e0131431, DOI 10.1371/journal.pone.0131431. - Cited References:60. - This work was supported by joint projects of Russian Foundation for Basic Research and Belarusian Republican Foundation for Fundamental Research (No 14-05-90005-Bel-a to O.P.D and A.P.T., and No B14R-066 to Zh.B.). K.W.T. was supported by a Humboldt Fellowship for Experienced Researchers (Germany), M.I.G. was supported by Russian Federal Tasks of Fundamental Research (project No. 51.1.1), H.P.G. and G.K. were supported by grants from the German Science Foundation (GR 1540/20-1 and KI-853/8-1). . - ISSN 1932-6203

РУБ Multidisciplinary Sciences
Рубрики:
FRESH-WATER
NONCONSUMPTIVE MORTALITY
NONPREDATORY MORTALITY
Аннотация: Background Mortality is a main driver in zooplankton population biology but it is poorly constrained in models that describe zooplankton population dynamics, food web interactions and nutrient dynamics. Mortality due to non-predation factors is often ignored even though anecdotal evidence of non-predation mass mortality of zooplankton has been reported repeatedly. One way to estimate non-predation mortality rate is to measure the removal rate of carcasses, for which sinking is the primary removal mechanism especially in quiescent shallow water bodies. Objectives and Results We used sediment traps to quantify in situ carcass sinking velocity and non-predation mortality rate on eight consecutive days in 2013 for the cladoceran Bosmina longirostris in the oligo-mesotrophic Lake Stechlin; the outcomes were compared against estimates derived from in vitro carcass sinking velocity measurements and an empirical model correcting in vitro sinking velocity for turbulence resuspension and microbial decomposition of carcasses. Our results show that the latter two approaches produced unrealistically high mortality rates of 0.58-1.04 d(-1), whereas the sediment trap approach, when used properly, yielded a mortality rate estimate of 0.015 d(-1), which is more consistent with concurrent population abundance data and comparable to physiological death rate from the literature. Ecological implications Zooplankton carcasses may be exposed to water column microbes for days before entering the benthos; therefore, non-predation mortality affects not only zooplankton population dynamics but also microbial and benthic food webs. This would be particularly important for carbon and nitrogen cycles in systems where recurring mid-summer decline of zooplankton population due to non-predation mortality is observed.

WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Swansea Univ, Dept Biosci, Swansea SA2 8PP, W Glam, Wales.
Swansea Univ, Ctr Sustainable Aquat Res, Swansea SA2 8PP, W Glam, Wales.
MU, Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Ecohydrol, D-12587 Berlin, Germany.
Natl Acad Sci Belarus Bioresources, Sci & Pract Ctr, Minsk 220072, Byelarus.
Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Expt Limnol, D-16775 Neuglobsow, Germany.
Univ Potsdam, Inst Biochem & Biol, D-14469 Potsdam, Germany.

Доп.точки доступа:
Dubovskaya, Olga P.; Tang, Kam W.; Gladyshev, Michail I.; Kirillin, Georgiy; Buseva, Zhanna; Kasprzak, Peter; Tolomeev, Aleksandr P.; Grossart, Hans-Peter; Russian Foundation for Basic Research; Belarusian Republican Foundation for Fundamental Research [14-05-90005-Bel-a, B14R-066]; Humboldt Fellowship for Experienced Researchers (Germany); Russian Federal Tasks of Fundamental Research [51.1.1]; German Science Foundation [GR 1540/20-1, KI-853/8-1]

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12.

577.34
И 73


    Интенсивность накопления урана-238 представителями разных экологических уровней экосистемы р. Енисей [Текст] / Сибирское Отделение Российской академии наук, Институт биофизики СО РАН ; Институт биофизики СО РАН // Вестник Томского государственного университета. Биология. - 2016. - № 2 (34) . - С. 161-171DOI 10.17223/19988591/34/11
   Перевод заглавия: Accumulation of uranium-238 by representatives of different ecological levels in the Yenisei River ecosystem

УДК

577.34

597.5

Кл.слова (ненормированные):
коэффициент накопления -- трофический уровень -- Philolimnogammarus viridis -- Fointinalis antipyretica -- Thymallus arcticus -- Esox lucius)
Аннотация: В результате многолетних исследований (2010-2013) получены данные по накоплению урана-238 в гидробионтах разных трофических уровней экосистемы р. Енисей. Пробы водного мха (Fointinalis antipyretica), зообентоса (Philolimnogammarus viridis и Ph. Cyaneus), сибирского хариуса (Thymallus arcticus) и щуки (Esox lucius) отбирали в районе ранее зарегистрированного повышенного содержания урана в воде р. Енисей (вблизи радиоактивных сбросов Горно-химического комбината Росатома). Показано, что уран способен эффективно накапливаться из воды в биомассе всех исследованных гидробионтов. Максимальные коэффициенты накопления (КН) урана получены для водного мха, что многократно превышает КН урана для зообентоса и мышечной ткани рыб. Средние значения КН урана для зообентоса статистически значимо превышают КН в мышцах рыб за весь период наблюдения. Не выявлено статистически значимых отличий в накоплении урана рыбами разного трофического уровня (хариус и щука)
The aim of the research was a comparative evaluation of the intensity of uranium-238 accumulation in the biomass of aquatic organisms, occupying different trophic levels in the ecosystem of the Yenisei river. Previously, uranium-238 at concentrations higher than the background ones was detected in water and sediment samples of the Yenisei River collected close to the discharge site of one of the Rosatom facilities (the Mining-and-Chemical Combine). However, radioecological studies of the Yenisei River ecosystem have not focused on uranium isotopes in aquatic organisms so far. The toxic effects of uranium on living organisms are known to be based on its both radioactive and chemical properties. We conducted a study on accumulation of uranium-238 in aquatic organisms at different trophic levels in the Yenisei River ecosystem between 2010 and 2013. We collected samples of aquatic moss (Fointinalis antipyretica), zoobenthos (Philolimnogammarus viridis and Ph. cyaneus), arctic grayling (Thymallus arcticus), and pike (Esox lucius) from the Yenisei region at a distance of 85-90 km downstream of Krasnoyarsk (5-10 km downstream of the radioactive discharge of the Mining-and-Chemical Combine). Data on samples are shown in Table 1. We determined uranium concentration in the samples of aquatic organisms by neutron activation analysis, in water - by ICP-MS (Table 2). The study shows that uranium can be effectively concentrated from water and accumulate in the biomass of all aquatic organisms used in experiments. The highest uranium concentration factors (CFs) were obtained for aquatic moss, and they were several times higher than the uranium CFs for zoobenthos and fish muscles. Based on the uranium concentration from water, all aquatic organisms of the Yenisei River used in this study can be ranked as follows: aquatic moss > gammarids > grayling = pike. No statistically significant difference has been found between uranium accumulation by fish of different trophic levels (Arctic grayling and pike). The uranium CFs obtained in this study is comparable with the literature data on the CFs of artificial radionuclides for aquatic moss and fish of the Yenisei River

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Держатели документа:
Институт биофизики Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Болсуновский, Александр Яковлевич; Трофимова, Елена Александровна; Дементьев, Дмитрий Владимирович; Карпов, Антон Дмитриевич; Институт биофизики Сибирского отделения Российской Академии наук (Красноярск)

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13.

Use of the aquatic plant Elodea canadensis to assess toxicity and genotoxicity of Yenisei River sediments / T. A. Zotina [et al.] // Environ. Toxicol. Chem. - 2015. - Vol. 34, Is. 10. - P2310-2321, DOI 10.1002/etc.3057 . - ISSN 0730-7268
Кл.слова (ненормированные):
Aquatic plants -- Biomarkers -- Genotoxicity -- Sediment quality -- Sediment toxicity -- Biomarkers -- Chromosomes -- Cytotoxicity -- Pollution -- Pollution control -- Radioactive waste disposal -- Radioactivity -- River pollution -- Sediments -- Toxicity -- Aquatic plants -- Genotoxicities -- Laboratory bioassay -- Radioactive contamination -- Radioactive pollution -- Sediment quality -- Sediment toxicity -- Toxicity endpoints -- Rivers -- Article -- bioassay -- controlled study -- cytotoxicity -- Elodea canadensis -- environmental exposure -- genotoxicity -- indicator organism -- lake sediment -- mitosis index -- nonhuman -- plant growth -- plant root -- priority journal -- radioactive pollution -- river -- root length -- Russian Federation -- sensitivity analysis -- shoot -- toxicity testing -- Elodea -- Elodea canadensis
Аннотация: The toxicity, cytotoxicity, and genotoxicity of bulk sediments from the Yenisei River (Siberia, Russia) were estimated in laboratory bioassays based on several endpoints in the aquatic plant Elodea canadensis. The bottom sediment samples were collected in the Yenisei River upstream and downstream of the sources of chemical and radioactive contamination. The testing revealed different sensitivities of Elodea endpoints to the quality of the bottom sediment: weight of shoots
Scopus,
WOS
Держатели документа:
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zotina, T. A.; Trofimova, E. A.; Medvedeva, M. Y.; Dementyev, D. V.; Bolsunovsky, A. Y.

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14.

Chromosomal abnormalities in roots of aquatic plant Elodea canadensis as a tool for testing genotoxicity of bottom sediments / T. Zotina [et al.] // Ecotoxicol. Environ. Saf. - 2015. - Vol. 122. - P384-391, DOI 10.1016/j.ecoenv.2015.08.021 . - ISSN 0147-6513
Кл.слова (ненормированные):
Anaphase-telophase -- Chromosome damage -- Heavy metals -- Macrophyte -- Radionuclides -- Sediment-contact tests -- Elodea canadensis
Аннотация: Submersed freshwater macrophytes are considered as relevant indicators for use in bulk bottom sediment contact tests. The purpose of this study was to estimate the validity of endpoints of aquatic plant Elodea canadensis for laboratory genotoxicity testing of natural bottom sediments. The inherent level of chromosome abnormalities (on artificial sediments) in roots of E. canadensis under laboratory conditions was lower than the percentage of abnormal cells in bulk sediments from the Yenisei River. The percentage of abnormal cells in roots of E. canadensis was more sensitive to the presence of genotoxic agents in laboratory contact tests than in the natural population of the plant. The spectra of chromosomal abnormalities that occur in roots of E. canadensis under natural conditions in the Yenisei River and in laboratory contact tests on the bulk bottom sediments from the Yenisei River were similar. Hence, chromosome abnormalities in roots of E. canadensis can be used as a relevant and sensitive genotoxicity endpoint in bottom sediment-contact tests. © 2015 Elsevier Inc.

Scopus,
WOS
Держатели документа:
Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zotina, T.; Medvedeva, M.; Trofimova, E.; Alexandrova, Y.; Dementyev, D.; Bolsunovsky, A.

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15.

High Resistance of Resting Eggs of Cladoceran Moina macrocopa to the Effect of Heavy Metals / N. Oskina [et al.] // Bull. Environ. Contam. Toxicol. - 2018, DOI 10.1007/s00128-018-2473-7 . - Article in press. - ISSN 0007-4861
Кл.слова (ненормированные):
Hatching success -- Heavy metals -- Life table parameters -- Resistance -- Resting eggs -- Copper -- Electric resistance -- Aquatic habitats -- Critical concentration -- Environmental pollutions -- Hatching success -- High resistance -- Lethal concentration -- Life table -- Resting eggs -- Heavy metals
Аннотация: The research aimed to determine critical concentrations of heavy metals at which survival of resting eggs of the cladoceran Moina macrocopa is negatively affected. Resting eggs’ viability was not affected over a 30-days exposure towards copper, cadmium, zinc or nickel at concentrations up to 60–70 g/L. When resting eggs were exposed to sediment contaminated with heavy metals for 8 months, the hatching success was affected at 30 g copper/kg. Thus, resting eggs of Cladocera can tolerate heavy metals at concentrations that far exceed lethal concentrations of heavy metals to active life stage and exceed low or moderate levels of environmental pollution. Follow up investigation of life table parameters of hatchlings from resting eggs exposed to heavy metals demonstrated that neither lifespan nor fecundity of hatchlings differ from control animals. These results demonstrate that zooplankton may rapidly recover from resting egg bank once aquatic habitat becomes unpolluted. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.

Scopus,
Смотреть статью,
WOS
Держатели документа:
Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodniy Ave, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Oskina, N.; Lopatina, T.; Anishchenko, O.; Zadereev, E.

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16.

Spatial and temporal variation in Arctic freshwater chemistry-Reflecting climate-induced landscape alterations and a changing template for biodiversity / B. J. Huser, M. N. Futter, D. Bogan [et al.] // Freshw. Biol. - 2020, DOI 10.1111/fwb.13645. - Cited References:98. - Environment and Climate Change Canada; Cumulative Impact Monitoring Program, Government of Northwest Territories . - Article in press. - ISSN 0046-5070. - ISSN 1365-2427

РУБ Ecology + Marine & Freshwater Biology
Рубрики:
DISSOLVED ORGANIC-CARBON
PERMAFROST THAW
CHEMICAL LIMNOLOGY
Кл.слова (ненормированные):
biogeochemistry -- eutrophication -- lakes -- oligotrophication -- rivers
Аннотация: Freshwater chemistry across the circumpolar region was characterised using a pan-Arctic data set from 1,032 lake and 482 river stations. Temporal trends were estimated for Early (1970-1985), Middle (1986-2000), and Late (2001-2015) periods. Spatial patterns were assessed using data collected since 2001. Alkalinity, pH, conductivity, sulfate, chloride, sodium, calcium, and magnesium (major ions) were generally higher in the northern-most Arctic regions than in the Near Arctic (southern-most) region. In particular, spatial patterns in pH, alkalinity, calcium, and magnesium appeared to reflect underlying geology, with more alkaline waters in the High Arctic and Sub Arctic, where sedimentary bedrock dominated. Carbon and nutrients displayed latitudinal trends, with lower levels of dissolved organic carbon (DOC), total nitrogen, and (to a lesser extent) total phosphorus (TP) in the High and Low Arctic than at lower latitudes. Significantly higher nutrient levels were observed in systems impacted by permafrost thaw slumps. Bulk temporal trends indicated that TP was higher during the Late period in the High Arctic, whereas it was lower in the Near Arctic. In contrast, DOC and total nitrogen were both lower during the Late period in the High Arctic sites. Major ion concentrations were higher in the Near, Sub, and Low Arctic during the Late period, but the opposite bulk trend was found in the High Arctic. Significant pan-Arctic temporal trends were detected for all variables, with the most prevalent being negative TP trends in the Near and Sub Arctic, and positive trends in the High and Low Arctic (mean trends ranged from +0.57%/year in the High/Low Arctic to -2.2%/year in the Near Arctic), indicating widespread nutrient enrichment at higher latitudes and oligotrophication at lower latitudes. The divergent P trends across regions may be explained by changes in deposition and climate, causing decreased catchment transport of P in the south (e.g. increased soil binding and trapping in terrestrial vegetation) and increased P availability in the north (deepening of the active layer of the permafrost and soil/sediment sloughing). Other changes in concentrations of major ions and DOC were consistent with projected effects of ongoing climate change. Given the ongoing warming across the Arctic, these region-specific changes are likely to have even greater effects on Arctic water quality, biota, ecosystem function and services, and human well-being in the future.

WOS
Держатели документа:
Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Box 7050, S-75007 Uppsala, Sweden.
Univ Alaska Anchorage, Alaska Ctr Conservat Sci, Anchorage, AK USA.
Norwegian Water Resources & Energy Directorate, Oslo, Norway.
Univ Oslo, Nat Hist Museum, Oslo, Norway.
Wilfrid Laurier Univ, Cold Regions Res Ctr, Waterloo, ON, Canada.
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk, Russia.
Umea Univ, Climate Impacts Res Ctr, Dept Ecol & Environm Sci, Umea, Sweden.
Queens Univ, Dept Biol, Paleoecol Environm Assessment & Res Lab PEARL, Kingston, ON, Canada.
Norwegian Inst Nat Res, Oslo, Norway.
Univ New Brunswick, Canadian Rivers Inst, Fredericton, NB, Canada.
Univ New Brunswick, Dept Biol, Fredericton, NB, Canada.

Доп.точки доступа:
Huser, Brian J.; Futter, Martyn N.; Bogan, Daniel; Brittain, John E.; Culp, Joseph M.; Goedkoop, Willem; Gribovskaya, Iliada; Karlsson, Jan; Lau, Danny C. P.; Ruhland, Kathleen M.; Schartau, Ann Kristin; Shaftel, Rebecca; Smol, John P.; Vrede, Tobias; Lento, Jennifer; Environment and Climate Change Canada; Cumulative Impact Monitoring Program, Government of Northwest Territories

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17.

Accumulation of elements by submerged (Stuckenia pectinata (L.) Borner) and emergent (Phragmites australis (Cay.) Trin. ex Steud.) macrophytes under different salinity levels / O. V. Anishchenko, A. P. Tolomeev, E. A. Ivanova [et al.] // Plant Physiol. Biochem. - 2020. - Vol. 154. - P328-340, DOI 10.1016/j.plaphy.2020.05.019. - Cited References:44. - The work was supported by Russian Foundation for Basic Research, grant No. 15-04-00797-a. The authors are grateful to the staff of Analytical Laboratory at the Institute of Biophysics SB RAS for the plant and sediment sample preparation for ICP-OES analysis and Elena Krasova for linguistic check and improvements. . - ISSN 0981-9428

РУБ Plant Sciences
Рубрики:
SEDIMENT QUALITY GUIDELINES
HEAVY-METAL ACCUMULATION
SALT-MARSH
Кл.слова (ненормированные):
Aquatic plants -- Essential/beneficial elements -- Non-essential elements -- Water conductivity
Аннотация: Accumulation of essential/beneficial and non-essential chemical elements by submerged (Stuckenia pectinata (L.) Borner) and emergent (Phragmites australis (Cay.) Trin. ex Steud.) rooted macrophytes in three water bodies was studied as dependent on water salinity (specific conductivity) and main environmental factors (temperature, pH of water, growing period, element contents in water and sediments). Inductively coupled plasma optical emission spectrometry (ICP - OES) was used for the element detection in the plants, sediments, and water. Multivariate statistics redundancy analysis (RDA) showed that investigated factors together explained 37.8 44.7% and 29.9 - 42.6% of the essential/beneficial and non-essential elements variability, respectively, whereas salinity was one of the main factors determining the accumulation of a number of elements (Mg, S, Na, Li, Sr, Sb) by the macrophytes. A decrease in the essential element contents (K, P, N, Cu, Zn) was observed in both species of the macrophytes during the growing season. Environmental factors (salinity, growing period, and pH) were more significant than the element contents in water and the sediments for the essential/beneficial element accumulation by two species of the macrophytes. The element contents in the sediments to a greater extent determined non-essential element accumulation by P. australis than by S. pectinata. The study showed that the efficiency of using P. australis and S. pectinata for remediation of aquatic ecosystems contaminated by heavy metals should not decrease with a salinity increase.

WOS
Держатели документа:
Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Akad Gorodok 50-50, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Av, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Anishchenko, O., V; Tolomeev, A. P.; Ivanova, E. A.; Drobotov, A., V; Kolmakova, A. A.; Zuev, I., V; Gribovskaya, I., V; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [15-04-00797-a]

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18.

Traces of the Tunguska Event (1908) in Sediments of Zapovednoe Lake Based on SR-XRF Data / A. V. Darin, D. Y. Rogozin, A. V. Meydus [et al.] // Dokl. Earth Sci. - 2020. - Vol. 492, Is. 2. - P442-445, DOI 10.1134/S1028334X20060045. - Cited References:10. - This study was performed as a part of a State Assignment of the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, and supported by the Russian Foundation for Basic Research, project nos. 19-04-00320 and 19-05-50046. This study was per-formed in the Shared Research Center "Siberian Synchrotron and Terahertz Radiation Center" on the basis of the VEPP-4-VEPP-2000 Electron-Positron Collider Complex of the Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, using equipment supported by project no. RFMEFI62119X0022. . - ISSN 1028-334X. - ISSN 1531-8354

РУБ Geosciences, Multidisciplinary

Кл.слова (ненормированные):
Tunguska event 1908 -- lake sediments -- X-ray fluorescent analysis (XRF) -- synchrotron radiation (SR) -- microelements
Аннотация: An anomalous layer enriched with chemical elements indicating the presence of terrigenous matter was discovered in the sediment core of Zapovednoe Lake located 60 km from the epicenter of the Tunguska event (1908) using synchrotron radiation X-ray fluorescence spectroscopy (SR-XRF). Radioisotope measurements indicate that the age of the layer is consistent with the date of the catastrophe. Apparently, the anomalous layer was formed as a result of an intense terrigenous matter inflow from the water catchment area due to massive forest falls and subsequent wildfires caused by the Tunguska event. Thus, it is established that targeted searches for microparticles of extraterrestrial origin can be carried out in the discovered and dated anomalous bottom sediment layer.

WOS
Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Tungusskii State Nat Reserve, Krasnoyarsk 648490, Russia.
Russian Acad Sci, Budker Inst Nucl Phys, Siberian Branch, Novosibirsk 630090, Russia.
Kurchatov Inst Natl Res Ctr, Moscow 123182, Russia.

Доп.точки доступа:
Darin, A., V; Rogozin, D. Yu; Meydus, A., V; Babich, V. V.; Kalugin, I. A.; Markovich, T., I; Rakshun, Ya, V; Darin, F. A.; Sorokoletov, D. S.; Gogin, A. A.; Senin, R. A.; Degermendzhi, A. G.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-04-00320, 19-05-50046]; Institute of Nuclear Physics, Siberian Branch, Russian Academy of SciencesRussian Academy of Sciences [RFMEFI62119X0022]

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19.

Spatial and temporal variation in Arctic freshwater chemistry—Reflecting climate-induced landscape alterations and a changing template for biodiversity / B. J. Huser, M. N. Futter, D. Bogan [et al.] // Freshw. Biol. - 2020, DOI 10.1111/fwb.13645 . - Article in press. - ISSN 0046-5070
Кл.слова (ненормированные):
biogeochemistry -- eutrophication -- lakes -- oligotrophication -- rivers
Аннотация: Freshwater chemistry across the circumpolar region was characterised using a pan-Arctic data set from 1,032 lake and 482 river stations. Temporal trends were estimated for Early (1970–1985), Middle (1986–2000), and Late (2001–2015) periods. Spatial patterns were assessed using data collected since 2001. Alkalinity, pH, conductivity, sulfate, chloride, sodium, calcium, and magnesium (major ions) were generally higher in the northern-most Arctic regions than in the Near Arctic (southern-most) region. In particular, spatial patterns in pH, alkalinity, calcium, and magnesium appeared to reflect underlying geology, with more alkaline waters in the High Arctic and Sub Arctic, where sedimentary bedrock dominated. Carbon and nutrients displayed latitudinal trends, with lower levels of dissolved organic carbon (DOC), total nitrogen, and (to a lesser extent) total phosphorus (TP) in the High and Low Arctic than at lower latitudes. Significantly higher nutrient levels were observed in systems impacted by permafrost thaw slumps. Bulk temporal trends indicated that TP was higher during the Late period in the High Arctic, whereas it was lower in the Near Arctic. In contrast, DOC and total nitrogen were both lower during the Late period in the High Arctic sites. Major ion concentrations were higher in the Near, Sub, and Low Arctic during the Late period, but the opposite bulk trend was found in the High Arctic. Significant pan-Arctic temporal trends were detected for all variables, with the most prevalent being negative TP trends in the Near and Sub Arctic, and positive trends in the High and Low Arctic (mean trends ranged from +0.57%/year in the High/Low Arctic to ?2.2%/year in the Near Arctic), indicating widespread nutrient enrichment at higher latitudes and oligotrophication at lower latitudes. The divergent P trends across regions may be explained by changes in deposition and climate, causing decreased catchment transport of P in the south (e.g. increased soil binding and trapping in terrestrial vegetation) and increased P availability in the north (deepening of the active layer of the permafrost and soil/sediment sloughing). Other changes in concentrations of major ions and DOC were consistent with projected effects of ongoing climate change. Given the ongoing warming across the Arctic, these region-specific changes are likely to have even greater effects on Arctic water quality, biota, ecosystem function and services, and human well-being in the future. © 2020 The Authors. Freshwater Biology published by John Wiley & Sons Ltd.

Scopus
Держатели документа:
Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
Alaska Center for Conservation Science, University of Alaska Anchorage, Anchorage, AK, United States
Norwegian Water Resources & Energy Directorate, Oslo, Norway
Natural History Museum, University of Oslo, Oslo, Norway
Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, ON, Canada
Institute of Biophysics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Ecology and Environmental Science, Climate Impacts Research Centre, Umea University, Abisko, Sweden
Paleoecological Environmental Assessment and Research Laboratory (PEARL), Department of Biology, Queen’s University, Kingston, ON, Canada
Norwegian Institute for Nature Research, Oslo, Norway
Canadian Rivers Institute and Department of Biology, University of New Brunswick, Fredericton, NB, Canada

Доп.точки доступа:
Huser, B. J.; Futter, M. N.; Bogan, D.; Brittain, J. E.; Culp, J. M.; Goedkoop, W.; Gribovskaya, I.; Karlsson, J.; Lau, D. C.P.; Ruhland, K. M.; Schartau, A. K.; Shaftel, R.; Smol, J. P.; Vrede, T.; Lento, J.

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20.

    Effect of the level of irradiance on growth and content of photosynthetic pigments of Canadian Elodea (Elodea Canadensis) in model system “Water-Bottom Sediments” / Y. V. Aleksandrova, T. A. Zotina, N. A. Gaevsky // J. Sib. Fed. Univ. - Biol. - 2020. - Vol. 13, Is. 2. - С. 188-196, DOI 10.17516/1997-1389-0317 . - ISSN 1997-1389
   Перевод заглавия: Влияние светового фактора на рост и содержание фотосинтетических пигментов элодеи канадской (Elodea canadensis) в модельной системе «вода-донные отложения»
Кл.слова (ненормированные):
Aquatic plant -- Bioassay -- Bottom sediment -- Light saturation -- Photosynthetic pigments -- Root length -- Shoot length
Аннотация: Bioassays based on aquatic plants are a convenient tool for studying the quality of bottom sediments. One of the stages in the development of a bioassay is the selection of optimal growth conditions for indicator plants in a model test system. Response of indicator physiological endpoints of Canadian waterweed (Elodea canadensis) to light flux density was investigated to determine optimal irradiance level in a “water - sediment” model system, proposed previously for contact bioassay of natural bulk bottom sediments. Based on the response of shoot and root growth (length and weight), and concentration and ratio of photosynthetic pigments (chl. a, chl. b, and carotenoids) of Elodea to the change of light flux density, no limitation or inhibition of growth and photosynthesis of Elodea was revealed at light flux density from 56 to 143 µmol quanta • m-2 • s-1. Hence, the level of irradiance within this range can be recommended for use in the experimental system proposed for bioassay of bulk bottom sediments using E. canadensis as an indicator. © Siberian Federal University. All rights reserved

Scopus
Держатели документа:
Institute of Biophysics FRC, Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleksandrova, Y. V.; Zotina, T. A.; Gaevsky, N. A.

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