Microbiological Characterization of Permafrost Soil of the Tit-Ary Island (Yakutia)
T. I. Ivanova, N. P. Kuz'mina, A. P. Isaev
Institute of Biological Problems of Cryolitozone SB RAS
salomaxa8@mail.ru
Keywords: polygonаl valik tundra, permafrost, soil, microorganisms, oligonitrophilic bacteria, heterotrophs
Pages: 831-840
Abstract
Microbiological composition of the soil of the unique island Tit-Ary in the lower reach of the Lena river was studied fort he first time in detail. The features of the microbial population of cryozem were revealed: high number of individuals in all the groups of microorganisms (104-108 CFU/g), which is comparable with the density of microbes in the steppe soil of Transbaikalia, and the special character of their distribution over the soil profile without a decrease in number with depth. Oligonitrophilic bacteria dominated in the humus-gley soil of the polygon valik tundra; their number varied from 70 thousand to 330 mln CFU/g of soil.
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