The spatial distribution of biological and ecological patterns in the Angara-Lena mountain province in Eastern Siberia is characterized according to the data of agroland- scape and ecological zoning of forage lands to assess the potential, sustainable agricultural nature management and environmental protection in the region. The province occupies area of 12 451.7 thousand hectares in the southern taiga zone and covers the Angara-Lena plateau (with 800-1460 m altitudes) and the low-mountain Primorsky Ridge. Most of the province territory (about 83%) is occupied by mountain forests. The area of agricultural land is 5% of the total area (including arable lands 2.7%, hayfields 0.7%, and pastures 1.5%). Significant areas of larch, mixed, birch forests of low mountains with a grass cover of large grasses (mountain crayfish, mixed-leaved bodyak, forest geranium, northern bedstraw, bathhouse species) and cereals (Langsdorf weinwort, spreading bor, sod pike, etc.) are used for grazing. The ecological state of the landscapes is tense, and tense and heavy for thearable. Agriculture and plant growing riskiness is highlighted according to natural and climate region features, especially erosion increasing as a result of agriculture. Simultaneously, however, the richest natural resources in the province, including fodder ones, are perspective for agriculture development.
The potential for natural forest regeneration in the southern taiga zone of Western Siberia.
