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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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Effect of winter conditions on distributions of anoxic phototrophic bacteria in two meromictic lakes in Siberia, Russia / D. Y. Rogozin [et al.] // Aquatic Ecology. - 2009. - Vol. 43, Is. 3. - P661-672, DOI 10.1007/s10452-009-9270-7 . - ISSN 1386-2588
Кл.слова (ненормированные):
Chemocline -- Green sulphur bacteria -- Purple sulphur bacteria -- Snow -- Winter -- anoxic conditions -- bacterium -- biomass -- ice cover -- light intensity -- meromictic lake -- photoautotrophy -- remote sensing -- vertical distribution -- Eurasia -- Khakassia -- Lake Shira -- Lake Shunet -- Russian Federation -- Siberia -- Bacteria (microorganisms) -- Photobacteria
Аннотация: The year-to-year variations of vertical distribution and biomass of anoxic phototrophic bacteria were studied during ice periods 2003-2005 and 2007-2008 in meromictic lakes Shira and Shunet (Southern Siberia, Russian Federation). The bacterial layers in chemocline of both lakes were sampled with a thin-layer hydraulic multi-syringe sampler. In winter, biomass of purple sulphur bacteria varied considerably depending on the amount of light penetrating into the chemocline through the ice and snow cover. In relatively weakly stratified, brackish Shira Lake, the depth of chemocline varied between winters, so that light intensity for purple sulphur bacteria inhabiting this zone differed. In Shira Lake, increased transparency of mixolimnion in winter, high chemocline position and absence of snow resulted in light intensity and biomass of purple sulphur bacteria exceeding the summer values in the chemocline of the lake. We could monitor snow cover at the lake surface using remote sensing and therefore estimate dynamics and amount of light under ice and its availability for phototrophic organisms. In Shunet Lake, the light intensities in the chemocline and biomasses of purple sulphur bacteria were always lower in winter than in summer, but the biomasses of green sulphur bacteria were similar. В© Springer Science+Business Media B.V. 2009.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50-50, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny 79, 660071 Krasnoyarsk, Russian Federation
Center for Limnology, The Netherlands Institute of Ecology, Nieuwersluis, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rogozin, D.Y.; Zykov, V.V.; Chernetsky, M.Y.; Degermendzhy, A.G.; Gulati, R.D.

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