Response of microbial communities of Lake Baikal to extreme temperatures

Maksimov, V. V.; Shchetinina, E. V.; Kraykivskaya, O. V.; Maksimova, E. A.

doi:10.1134/s0026261706060063

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…At every station, the highest TMN values were observed in the surface horizons. Such distribution is typical of deep oligotrophic lakes, including Lake Baikal [24].…”

Section: Resultsmentioning

confidence: 95%

Detection of methane in the water column at gas and oil seep sites in central and southern Lake Baikal

et al. 2015

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Microbiological and biogeochemical investigation of the water column of oligotrophic Lake Baikal at the sites of the K2 and Bolshoi mud volcanoes and the Gorevoy Utes oil seep was carried out in July 2013. Total microbial numbers (TMN), cell numbers of type I and type II methanotrophs, and methane con centrations were measured; the rate of methane oxidation was determined. Methane concentrations in Lake Baikal water column varied from 0.09 to 1 µL/L, while methane oxidation rates varied from 0.007 to 0.9 nL/(L day). The highest rates of methane oxidation were revealed in the near bottom water horizons at the sites of the Bolshoy mud volcano and the Gorevoy Utes oil seep. These were the sites where the most pro nounced anomalies in methane concentration were also detected. TMN varied from 0.123 × 10 6 to 1.64 × 10 6 cells/mL. Methanotrophic bacteria were revealed in the water column at all sites, their abundance did not always correlate with methane concentrations and the rates of methane oxidation. Methanotrophs consti tuted not more than 1.63% of the total microbial number, with their highest abundance in the upper 200 m of the water column.

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“…At every station, the highest TMN values were observed in the surface horizons. Such distribution is typical of deep oligotrophic lakes, including Lake Baikal [24].…”

Section: Resultsmentioning

confidence: 95%

Detection of methane in the water column at gas and oil seep sites in central and southern Lake Baikal

et al. 2015

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“…Mechanics. The survival rate, metabolic activity, and ability for growth of microbial communities of Lake Baikal have been first studied by Maksimov et al (2006) after exposure to extremely low temperatures (freeze-thawing) for different lengths of time. It has been shown that short-term freezing (1-3 days) slowed down the growth and activity of microbial communities.…”

Section: Lacustrine Systemsmentioning

confidence: 99%

Mixing and Transport

Darnault¹,

Uyuşur²

2007

Water Environment Research

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“…Phytoplankton is characterized by heterogeneous spatial distribution throughout the water area and interannual and seasonal fluctuations in the abundance and biomass of algae (Votintsev et al, 1975;Popovskaya, 1977;Popovskaya, 2000). Studies of bacterioplankton, its vertical and horizontal distribution, and seasonal changes have been systematically carried out for several decades (Maksimova, 1973(Maksimova, , 1976Maksimova and Maksimov, 1989; ABSTRACT. This research was investigated the seasonal changes in phytoplankton, bacterioplankton and autotrophic picoplankton as well as environmental parameters in the photic layer of Lake Baikal.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes of phyto-, bacterioplankton and autotrophic picoplankton in the photic layer of Lake Baikal

Bashenkhaeva,

Titova,

Martsinechko

et al. 2023

LFWB

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Abstract. This research was investigated the seasonal changes in phytoplankton, bacterioplankton and autotrophic picoplankton as well as environmental parameters in the photic layer of Lake Baikal. Using microscopy methods, 43 species belonging to Bacillariophyta, Dinophyta, Chlorophyta, Chrysophyta, Cryptophyta, Haptophyta, Charophyta and Cyanoprokaryota have been identified. Bacillariophyta and Chlorophyta were dominating throughout the year. The Shannon, Simpson, InvSimpson diversity indices, and evenness index showed that microalgae communities varied seasonally. In late spring these indices were significantly lower than in the under-ice period, summer and autumn that is due to the fact of the dominance of one species Ulnaria acus (K tzing) Aboal in the community. The abundance and biomass of phytoplankton also varied significantly depending on the season. Five different periods of phytoplankton development were identified, which were regulated by physicochemical factors.

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Response of microbial communities of Lake Baikal to extreme temperatures

Cited by 5 publications

References 2 publications

Detection of methane in the water column at gas and oil seep sites in central and southern Lake Baikal

Detection of methane in the water column at gas and oil seep sites in central and southern Lake Baikal

Mixing and Transport

Seasonal changes of phyto-, bacterioplankton and autotrophic picoplankton in the photic layer of Lake Baikal

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