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The priority purpose of landscape planning is preservation of natural environment with existing ecosystem interrelations under prevailing conditions for the territory development. Analysis of the contemporary state of plant cover is component part of the comprehensive program of studies on landscape planning, which reveals dynamics of vegetation, territorial differentiation, biological variety, degree of territory disturbance communities, and potential of their preservation. Natural stability of vegetation, which is supported not only at the level of biocenosis, but also at the level of spatial current connections of contemporary landscape, is one of the main conditions of preserving the biotope structure. Particularities of development and nature restoration determine ecologically favorable conditions of existence and renewal of plant cover structure. External disturbing factors set additional constraints on the motion of natural dynamics, slowing down restoration or completely leading to irreversible changes. The evaluation of sustainability of plant communities for the southern part of the Lake Baikal coast was carried out on the basis of expert estimation for multifactoral impacts upon dynamics and was represented using a cartographic method in the form of integrated areas of the sustainability of plant communities. Cartographic interpretation of contemporary vegetation state of investigated territory, the determining of the integrated areas of plant community’s sustainability, and further sequential carrying out of interconnected estimation maps, makes possible to differentiate territory in the categories of landscape planning for the complex preservation of natural environment and to develop the necessary measures for stabilization.

The conditions of the pyrogenic factor manifestation in the dynamics of the geosystems of the Baikal basin were described with data of Prebaikalski national park (PNP). Special features of the territory study natural conditions were examined, including the climatic conditions of the appearance of the forest fire centers. The extent of flammable period is fixed since April until September, a maximum quantity of fires is noted in the period of spring-early summer drought, but large forest fire areas take place with the irregular summer droughts. Lower forest fires predominate in the mountain taiga geosystems prevailing within this territory. Data on the forest fires from 1978 year were examined. It was built and analyzed the electronic database of forest fires from 1995 till 2017 year with GIS using. For the analysis of local conditions, the centers of fires and the burnt areas in the vector form were combined with the layers of topographic basis, forest inventory information, the thematic materials and field studies of the Institute of Geography RAS SB, space remote data of the different years for this territory, among which most informative proved to be the synthesized images Landsat-ETM 2000 ̶ 2017.It is represented integral cartographical pattern in 1995 ̶ 2017 of data spatial distribution of forest fire areas where were revealed the most flammable sections. The burnt area analysis was carried out. Localization conditions for large and small forest fires were examined. The catastrophic consequences of forest fires under the mountain conditions are connected with the making more active of slope processes, the degradation of soils as a result the processes of forest cover recovery are inhibited. It is stated the formation of the stably long-term derived forest cover structure in the Baikal basin. During the period in question exposing to forest fires of integrally more than half of PNP area characterizes the decrease of the water-protection and of environment forming functions in the Central ecological zone of the lake Baikal connected with post fire changing of geosystem states. The need of applying the territorially differentiated fire-prevention measures is based.