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Carotenoids in bottom sediments of lake Shira as a paleoindicator for reconstruction of Lake States in Khakassiya, Russia / V. V. Zykov [et al.] // Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - P434-442, DOI 10.1134/S199542551204018X . - ISSN 1995-4255
Кл.слова (ненормированные):
anaerobiosis -- bottom sediments -- holomixis -- meromixis -- okenone -- bacterium -- bioindicator -- biomarker -- carotenoid -- Holocene -- lacustrine deposit -- meromixis -- molecular analysis -- paleoclimate -- photoautotrophy -- reconstruction -- Khakassia -- Lake Shira -- Russian Federation
Аннотация: The concentrations of carotenoids buried in the bottom sediments of Lake Shira (Siberia, Khakassiya) have analyzed for the period of the last 2300 years. The bottom sediments were found to contain carotenoids, which are molecular markers of the corresponding groups of Phototrophic organisms. The bottom sediments of Lake Shira were shown to be a promising object for climate reconstructions of the Late Holocene in southern Siberia. В© 2012 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 5, build. 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Acedemika Koptyuga pr. 3, Novosibirsk 630090, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zykov, V.V.; Rogozin, D.Y.; Kalugin, I.A.; Dar'in, A.V.; Degermendzhi, A.G.

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Lake Shira Level Changes in Late Holocene [Text] / A. Darin [et al.] // Acta Geol. Sin.-Engl. Ed. - 2014. - Vol. 88. - P3-4, DOI 10.1111/1755-6724.12265_1. - Cited References:4. - This work was performed on equipment of the Common Use Center at theSiberian Synchrotron and Teraherz Radiation Center (Novosibirsk). It wassupported by the RFBR projects 13-05-00871, 14-02-00631. . - ISSN 1000-9515. - ISSN 1755-6724

РУБ Geosciences, Multidisciplinary

Кл.слова (ненормированные):
Lake Shira -- varve -- synchrotron radiation -- scanning X_ray fluorescence -- microanalysis

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Держатели документа:
Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia.
Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia.
Inst Biophys SB RAS, Krasnoyarsk 660036, Russia.
ИБФ СО РАН

Доп.точки доступа:
Darin, Andrey; Kalugin, Ivan; Maksimova, Natalya; Markovich, Tatiana; Rakshun, Yakov; Sorokoletov, Dmitryi; Darin, Fedor; Ragozin, Denis; RFBR [13-05-00871, 14-02-00631]

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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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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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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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