Maltsev Anton, Zelenina Darya, Safonov Alexey
V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch, RAS, Novosibirsk 630090, Russia.
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia.
Biology (Basel). 2023 Apr 23;12(5):642. doi: 10.3390/biology12050642.
This article presents geochemical, mineralogical and microbiological characteristics of five samples of modern bottom sediments in the littoral zone of the high-mountain salty lake Issyk-Kul. The 16S rRNA gene sequencing method shows that the microbial community consists of organic carbon degraders (representatives of phyla: , , and and families and ), photosynthetic microorganisms (representatives of , phototrophic , purple sulphur bacteria and cyanobacteria) and bacteria of the reducing branches of the sulphur biogeochemical cycle (representatives of , and ). The participation of microorganisms in processes in the formation of a number of authigenic minerals (calcite, framboidal pyrite, barite and amorphous Si) is established. The high diversity of microbial communities indicates the presence of labile organic components involved in modern biogeochemical processes in sediments. The active destruction of organic matter begins at the water-sediment interface.
本文介绍了高山盐湖伊塞克湖沿岸带五个现代底栖沉积物样本的地球化学、矿物学和微生物学特征。16S rRNA基因测序方法表明，微生物群落由有机碳降解菌（门的代表： 、 、 和 以及科 和 ）、光合微生物（ 、光养 、紫色硫细菌 和蓝细菌的代表）以及硫生物地球化学循环还原分支的细菌（ 、 和 的代表）组成。确定了微生物在一些自生矿物（方解石、莓球状黄铁矿、重晶石和无定形硅）形成过程中的参与。微生物群落的高度多样性表明沉积物中存在参与现代生物地球化学过程的不稳定有机成分。有机质的活跃破坏始于水 - 沉积物界面。
