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Primary production and microbial activity in the euphotic zone of Lake Baikal (Southern Basin) during late winter
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SYSNO ASEP 0024599 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Primary production and microbial activity in the euphotic zone of Lake Baikal (Southern Basin) during late winter Title Primární produkce a mikrobiální aktivita v eufotické vrstvě jezera Bajkal (jižní část) na konci zimy Author(s) Straškrábová, Viera (HBU-Z) RID
Izmest’yeva, L. R. (RU)
Maksimova, E. A. (RU)
Fietz, S. (DE)
Nedoma, Jiří (HBU-Z)
Borovec, Jakub (HBU-Z)
Kobanova, G. I. (RU)
Shchetinina, E. V. (RU)
Pislegina, E. V. (RU)Source Title Global and Planetary Change. - : Elsevier - ISSN 0921-8181
Roč. 46, 1-4 (2005), s. 57-73Number of pages 17 s. Language eng - English Country NL - Netherlands Keywords primary production ; bacterial production ; microbial loop Subject RIV DA - Hydrology ; Limnology CEZ AV0Z6017912 - HBU-Z, BC-A Annotation Three years of monitoring temperature, transparency, chlorophyll and bacteria at the vertical profile in the South basin of Lake Baikal were evaluated. Phytoplankton and the microbial loop in euphotic layer at the same site were investigated during March under the ice. Total primary cellular production (>1um) was 204 - 240 mg C/d/m square, with 35% of it in cells 1 – 3 um (picocyanobacteria). Total production (incl. extracellular) was 235 – 387 mg C/d/m square and the exudates were readily used by bacteria. This amounted to 1 – 5% of cellular production in upper 20m of water, and 11 – 77% of cellular production in deeper, light-limited layers. Bacterial counts reached 0.5 – 1.4 x 10 mill/ml and numbers of colony forming units on agar were 3 – 4 orders lower. Heterotrophic flagellates reached 6 to 87 ind/ml and ciliates 0.2 – 1.2 ind/ml. Bacterial production corresponded to a use of 20 – 40% of primary production per 24h in layers up to 20m. Workplace Institute of Hydrobiology (until 2005) Contact Václava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889 Year of Publishing 2006
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