Bioecological characteristics of the mosses of birch forests of the Krasnosamarsky forest and national park "Buzuluksky bor"

A number of model birch forests and their flora of mosses in the Krasnosamarsky forest and the Buzuluksky Bor National Park were studied. There were no reliable differences in the assessment of the environmental conditions of the birch bark of both territories. Flora of mosses of the studied birch forests is represented by 22 species in the Buzuluksky Bor and 19 in the Krasnosamarsky forest. The calculation of the community index of Chekanovsky-Surensen showed the average similarity of these studied flora of mosses (0.63). The projective coating of mosses is mainly formed by 2-4 dominant species in the studied birch forests of both territories, while the total value of the projective coating of the mosses was larger in the Krasnosamarsky forest in the studied birch communities than in the Buzuluksky Bor by 1.7 times. Such groups of mosses as mesotrophs, mesophytes and xeromezophytes prevailed for demand for comfort of habitat. Both flora of mosses can be characterized as boreo-nemoral. Significant differences were found in the use of mossy types of substrates: the main type of substrate is rotting wood in the studied birch forests in the Buzuluksky Bor and the trees bark in the Krasnosamarsky forest. 2 dominant species was revealed in the birch forests of the Krasnosamarsky forest, and 4 in the Buzuluksky Bor. The species Pylaisia polyantha (Hedw.) B.S.G. was a common species for the studied birch forests of the Krasnosamarsky forest and the Buzuluksky Bor.