Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1007/s00248-020-01592-9

Ключевые слова: lake uchum, bacterial community, meromictic lake, purple sulfur bacteria

Аннотация: Lake Uchum is a newly defined meromictic lake in Siberia with clear seasonal changes in its mixolimnion. This study characterized the temporal dynamics and vertical profile of bacterial communities in oxic and anoxic zones of the lake across all four seasons: October (autumn), March (winter), May (spring), and August (summer). Bacterial richness and diversity in the anoxic zone varied widely between time points.Proteobacteriawas the dominant bacterial phylum throughout the oxic and anoxic zones across all four seasons.Alphaproteobacteria(Loktanella) andGammaproteobacteria(Aliidiomarina) exhibited the highest abundance in the oxic and anoxic zone, respectively. Furthermore, there was a successional shift in sulfate-reducing bacteria (SRB) and sulfur-oxidizing bacteria in the anoxic zone across the seasons. The most dominant SRB,Desulfonatronovibriosp., is likely one of the main producers of hydrogen sulfide (H2S) and typically accumulates the most H2S in winter. The representative anoxygenic phototrophic bacterial group in Lake Uchum was purple sulfur bacteria (PSB). PSB were dominant (60.76%) in summer, but only had 0.2-1.5% relative abundance from autumn to spring. Multivariate analysis revealed that the abundance of these SRB and PSB correlated to the concentration of H2S in Lake Uchum. Taken together, this study provides insights into the relationships between changes in bacterial community and environmental features in Lake Uchum.

Журнал: MICROBIAL ECOLOGY

Выпуск журнала: Vol. 81, Is. 2

Номера страниц: 357-369

ISSN журнала: 00953628

Место издания: NEW YORK

Издатель: SPRINGER

• Chan Ya-Fan (Acad Sinica, Biodivers Res Ctr, Taipei 115, Taiwan)
• Chiang Pei-Wen (Acad Sinica, Biodivers Res Ctr, Taipei 115, Taiwan)
• Tandon Kshitij (Acad Sinica, Biodivers Res Ctr, Taipei 115, Taiwan; Acad Sinica, Taiwan Int Grad Program, Inst Informat Sci, Bioinformat Program, Taipei 115, Taiwan; Natl Tsing Hua Univ, Inst Mol & Cellular Biol, Hsinchu 300, Taiwan)
• Rogozin Denis (Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk 660036, Russia; Siberia Fed Univ, Krasnoyarsk 660041, Russia)
• Degermendzhi Andrey (Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk 660036, Russia)
• Zykov Vladimir (Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk 660036, Russia)
• Tang Sen-Lin (Acad Sinica, Biodivers Res Ctr, Taipei 115, Taiwan)

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