Аннотация:Modern molecular genetic methods have provided a extended
opportunities for studying the frequency taxonomic composition of soil
microbial communities, including uncultivated strains of microorganisms.
Modern spectrum analysis of operational taxonomic units (OTU) identified by
16Sr RNA gene is limited to the comparison of the nucleotide sequences. We
propose to use a fractal model to describe the frequency spectrum of microorganisms.
This model necessary to study the network self-organization of
microbial communities and the functional diversity of the processes of biological
systems. The power series from three frequencies of OTU are the fractal
model of frequencies spectrum of OTU (for example: 0.1, 0.01, 0.001). Because
there are many OTU’s peaks in the original spectrum, peaks grouped with the
same or similar amplitudes to form OTU-groups. Fractal topological analysis of
the location of OTU-groups on a fractal portrait of the microbial community was
been used to search for degenerate triangles with OTU-groups at the vertices,
since these OTU-groups correspond to a microbial biosystem and to fractal
model for the grouped OTU’s frequencies. The functional diversity index (IFD)
of biochemical processes is been determined by number of OTU-groups in
microbial community and by number of OTU-groups in biosystem. The IFDdynamics
was been calculated with using the daily data of molecular-genetic
analysis of soil samples. As a result, we revealed the periodic fluctuations in IFDvalues
and the periodic replacing of OTU-groups in a soil microbial biosystems
that provide a wide diversity of a biochemical processes in soil microbial
communities.
