On the issue of the diversity of mosses in the forests of the Trans-Baikal Territory

УДК 582.34:581.92(571.54/.55)

Abstract

The analysis of the taxonomic composition and abundance of mosses in the larch forests of the Chita region (in the Olengui and Beklemishevsky forest areas) of the Trans-Baikal Territory is given. Leaf stemmed mosses (real mosses) are the largest class of mosses. The purpose of this work is the taxation of moss cover in the forests of the Trans-Baikal Territory. Mosses were determined in the laboratory by the traditional anatomical and morphological method. A ceno-tic characteristic is given for each moss species, distribution and occurrence are indicated. In the bryoflora of two forest areas of the Trans-Baikal Territory, most mosses are defined as widespread species growing in several plant zones of the Holarctic. Such species, as a rule, are identified as the dominant moss cover of plant communities. In the forests of the Trans-Baikal Territory, mosses do not form a continuous cover. The harsh and dry climate causes desiccation of sandy and rocky-gravelly soils. Under the canopy of such forests there are no conditions for the development of moss cover. Therefore, the species composition of mosses is poor, and the projective coverage on the accounting sites ranges from 10 % to 45 %. In forest areas, mosses grow in open habitats: on wastelands, cuttings, burning, soil outcrops, sometimes on rocks and dead wood.