Maksimenko S Iu, Zemskaia T I, Pavlova O N, Ivanov V G, Buriukhaev S P
Mikrobiologiia. 2008 Sep-Oct;77(5):660-7.
The microbial communities of the estuarine zone and the mixing zone of river and lake waters in the Selenga River estuary were studied using the fluorescence in situ hybridization (FISH) method. The microorganisms belonging to the phylogenetic group Gammaproteobacteria were found to predominate in the river estuary, constituting up to 17% of the total bacterial community. Among cultivable microorganisms, organotrophic bacteria were predominant (2040 CFU/ml) in this zone, which results in high rates of microbial production (6.0 microg C/(1 day). The microbial community structure changed with distance from the river estuary; representatives of the Alpha-, Beta-, and Gammaproteobacteria were present in equal proportions; psychrotolerant and oligotrophic bacteria were numerous. The rate of heterotrophic carbon dioxide assimilation decreased to 3.8 microg C/(1 day). At 5-7 km from the river estuary, where the hydrologic, physical, and chemical conditions are similar to those of lake waters, members of the Betaproteobacteria, which are typical of the open waters of Lake Baikal, are the major representatives of planktonic microorganisms.
利用荧光原位杂交（FISH）方法对色楞格河河口的河口区以及河水与湖水混合区的微生物群落进行了研究。发现属于γ-变形菌门系统发育组的微生物在河口占主导地位，占细菌群落总数的比例高达17%。在可培养微生物中，有机营养细菌在该区域占主导地位（2040 CFU/ml），这导致微生物生产率较高（6.0微克碳/（1天））。微生物群落结构随距河口距离的变化而改变；α-、β-和γ-变形菌门的代表比例相当；耐冷和贫营养细菌数量众多。异养二氧化碳同化率降至3.8微克碳/（1天）。在距河口5 - 7公里处，水文、物理和化学条件与湖水相似，贝加尔湖开阔水域典型的β-变形菌门成员是浮游微生物的主要代表。
