Galach’yants A D, Bel’kova N L, Sukhanova E V, Galach’yants Yu P, Morozov A A, Parfenova V V
Mikrobiologiia. 2017 Mar-Apr;86(2):229-38.
The taxonomic composition of microbial communities of Lake Baikal surface microlayer was studied by pyrosequencing of the 16S rDNA amplicons. Statistically reliable differences were found between bacterioneuston of the shallow and deep-water stations. The shallow station community was characterized by higher diversity than the deep-water one. While bacterioneuston communities were shown to be less diverse than the water column communities, their diversity was comparable to that of other biofilm associations. Microbial communities of Lake Baikal surface microlayer were shown to be similar to those of the water column in the composition of predominant phyla, while differing considerably at the genus level. Bacterioneuston of Lake Baikal was comparable to microbial communities of the surface microlayer of other freshwater basins, although it was characterized by high abundance of the Alphaproteobacteria and Verrucomicrobia. High abundance of photoheterotrophs compared to the water column communities of other freshwater basins was another distinctive feature of Lake Baikal bacterioneuston. Our results showed the Lake Baikal surface microlayer to be a specific microbial community with low species diversity and relatively high abundance of photoheterotrophic microorganisms.
通过对16S rDNA扩增子进行焦磷酸测序，研究了贝加尔湖表层微层微生物群落的分类组成。在浅水站和深水站的细菌浮生物之间发现了具有统计学意义的可靠差异。浅水站群落的特点是多样性高于深水站。虽然细菌浮生物群落的多样性低于水柱群落，但其多样性与其他生物膜群落相当。贝加尔湖表层微层的微生物群落在主要门类的组成上与水柱的微生物群落相似，但在属水平上有很大差异。贝加尔湖的细菌浮生物与其他淡水盆地表层微层的微生物群落相当，尽管其特点是α-变形菌门和疣微菌门的丰度很高。与其他淡水盆地的水柱群落相比，光异养生物的高丰度是贝加尔湖细菌浮生物的另一个显著特征。我们的结果表明，贝加尔湖表层微层是一个特定的微生物群落，物种多样性低，光异养微生物的丰度相对较高。
