Abstract

The taxonomic and size-morphological structure of bacterioplankton has been studied in two large Mongolian reservoirs and the rivers on which they are built. Correlations between the taxonomic and size groups of bacteria and their main consumers, heterotrophic nanoflagellates, have been revealed. It has been shown that the protists consume large and active bacteria of classes Gammaproteobacteria and Bacteroidetes selectively, leaving small-sized Alphaproteobacteria and medium-sized Actinobacteria as dominants in the communities. The size–morphological structure of bacterioplankton formed by consumers is accompanied by spatial changes in the subdominants, probably performing similar functions in aquatic ecosystems.

中文翻译：

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两个蒙古水库中浮游细菌的分类和大小形态分类

摘要

在蒙古的两个大型水库及其所建河流中研究了浮游生物的分类学和大小形态结构。已经揭示出细菌的分类和大小组与其主要消费者异养纳米鞭毛虫之间的相关性。已经表明，原生生物有选择地消耗丙种变形杆菌和拟杆菌属的大而活跃的细菌，而小规模的变形杆菌和中型放线菌则是该群落中的优势菌。消费者形成的浮游细菌的大小形态结构伴随着次要优势的空间变化，可能在水生生态系统中发挥着相似的功能。