Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia)
During the growing season of 2018, planktonic microbocenosis of the north-western stretch of Lake Munozero (the Republic of Karelia) was studied. The total abundance, biomass, production, doubling time, as well as the number of heterotrophic bacteria were determined. The bacterial total abundance ranged from 0.6 to 1.2 mn cells ml-1 and biomass ranged from 0.12 to 0.355 g/m3. Average cell volumes of the bacteria ranged between 0.18 and 0.33 μm3. The maximum values of the total abundance and average volume of bacterioplankton cells were observed in spring, and the biomass reached the maximum values in autumn. Bacterial production varied between 0.01 and 0.33 mn cells ml-1. Specific growth rates (day-1) ranged around 0.01–0.45 day-1, giving doubling times of 37–1872 h. Vertical distribution of parameters of the heterotrophic bacterioplankton in the studied part of the lake was irregular and depended on stratification. During the research period, the abundance of saprophytic bacteria in the water was in the range of 14–294 CFU/ml, and the abundance of oligotrophic bacteria ranged from 150 to 1450 CFU/ml. The north-western stretch of Lake Munozero can be characterized as transitional from oligotrophic to mesotrophic.
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Language: | Russian |
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2019
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Subjects: | Biomass, Abundance, Microcoenosis, Bacterioplankton, Saprophytic bacteria, Oligotrophic lake, |
Online Access: | http://hdl.handle.net/1834/15357 |
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dig-aquadocs-1834-153572021-05-19T06:58:09Z Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) Бактериопланктон северо-западного плеса озера Мунозеро (Республика Карелия) Makarova, E.M. Bragina, T.M. Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake During the growing season of 2018, planktonic microbocenosis of the north-western stretch of Lake Munozero (the Republic of Karelia) was studied. The total abundance, biomass, production, doubling time, as well as the number of heterotrophic bacteria were determined. The bacterial total abundance ranged from 0.6 to 1.2 mn cells ml-1 and biomass ranged from 0.12 to 0.355 g/m3. Average cell volumes of the bacteria ranged between 0.18 and 0.33 μm3. The maximum values of the total abundance and average volume of bacterioplankton cells were observed in spring, and the biomass reached the maximum values in autumn. Bacterial production varied between 0.01 and 0.33 mn cells ml-1. Specific growth rates (day-1) ranged around 0.01–0.45 day-1, giving doubling times of 37–1872 h. Vertical distribution of parameters of the heterotrophic bacterioplankton in the studied part of the lake was irregular and depended on stratification. During the research period, the abundance of saprophytic bacteria in the water was in the range of 14–294 CFU/ml, and the abundance of oligotrophic bacteria ranged from 150 to 1450 CFU/ml. The north-western stretch of Lake Munozero can be characterized as transitional from oligotrophic to mesotrophic. В вегетационный сезон 2018 г. исследовался планктонный микробоценоз северо-западного плеса оз. Мунозеро (Республика Карелия). Определены общая численность, биомасса, продукция, время удвоения, а также количество гетеротрофных бактерий. Общая численность бактерий варьировала от 0,6 до 1,2 млн кл./мл, а биомасса от 0,12 до 0,355 г/м3. Средний объем клеток изменялся в диапазоне от 0,18 до 0,33 мкм3. Максимальные величины общей численности и среднего объема клеток бактериопланктона были отмечены весной, а биомасса достигала максимальных значений осенью. Бактериальная продукция варьировала в пределах от 0,01 до 0,33 млн кл./(мл.·сут). Р/В-коэффициент (сут-1) находился в пределах 0,01–0,45, что соответствовало времени удвоения 37–1872 часа. Вертикальное распределение показателей гетеротрофного бактериопланктона исследуемого участка озера было неравномерным и зависело от стратификации. Содержание сапрофитных бактерий в воде за исследуемый период изменялось от 14 до 294 КОЕ/мл. Численность олигокарбофильных бактерий варьировала в пределах 150–1450 КОЕ/мл. Северо- западный плес оз. Мунозеро по микробиологическим показателям можно охарактеризовать как переходный от олиготрофного к мезотрофному. Published 2019-07-11T08:47:22Z 2019-07-11T08:47:22Z 2019 Journal Contribution Refereed УДК 574.4(470.22) http://hdl.handle.net/1834/15357 ru https://celestra.ru/uploads/files/N2_2019_57_65.pdf pp.57-65 Munozero Lake Republic of Karelia |
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Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake |
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Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake Makarova, E.M. Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
description |
During the growing season of 2018, planktonic microbocenosis of the north-western stretch of Lake
Munozero (the Republic of Karelia) was studied. The total abundance, biomass, production, doubling time, as well as the number of heterotrophic bacteria were determined. The bacterial total abundance ranged from 0.6 to 1.2 mn cells ml-1 and biomass ranged from 0.12 to 0.355 g/m3. Average cell volumes of the bacteria ranged between 0.18 and 0.33 μm3. The maximum values of the total abundance and average volume of bacterioplankton cells were observed in spring, and the biomass reached the maximum values in autumn. Bacterial production varied between 0.01 and 0.33 mn cells ml-1. Specific growth rates (day-1) ranged around 0.01–0.45 day-1, giving doubling times of 37–1872 h. Vertical distribution of parameters of the heterotrophic bacterioplankton in the studied part of the lake was irregular and depended on stratification. During the research period, the abundance of saprophytic bacteria in the water was in the range of 14–294 CFU/ml, and the abundance of oligotrophic bacteria ranged from 150 to 1450 CFU/ml. The north-western stretch of Lake Munozero can be characterized as transitional from oligotrophic to mesotrophic. |
author2 |
Bragina, T.M. |
author_facet |
Bragina, T.M. Makarova, E.M. |
format |
Journal Contribution |
topic_facet |
Biomass Abundance Microcoenosis Bacterioplankton Saprophytic bacteria Oligotrophic lake |
author |
Makarova, E.M. |
author_sort |
Makarova, E.M. |
title |
Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
title_short |
Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
title_full |
Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
title_fullStr |
Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
title_full_unstemmed |
Bacterioplankton of the north-western stretch of Lake Munozero (the Republic of Karelia) |
title_sort |
bacterioplankton of the north-western stretch of lake munozero (the republic of karelia) |
publishDate |
2019 |
url |
http://hdl.handle.net/1834/15357 |
work_keys_str_mv |
AT makarovaem bacterioplanktonofthenorthwesternstretchoflakemunozerotherepublicofkarelia AT makarovaem bakterioplanktonseverozapadnogoplesaozeramunozerorespublikakareliâ |
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1756076823145349120 |