THE STRUCTURE OF FORESTS AT UPPER CHONA OIL-GAS CONDENSATE MINE, IRKUTSK REGION, RUSSIA

Studies of vegetation in the basin of the upper current of the Chona R. (a tributary of the Lena R., Irkutsk Region, East Siberia, Russia) were performed within activities on engineering ecology survey on the territory of Upper Chona oil-gas condensate mine (hereinafter – mine). The aim of these activities was to reveal and to estimate the modern state, injury and development forecast of the forests (and of the vegetation as a whole) within the mine since 1994, year of survey start. For this aim, a detailed analysis of available (archives) materials (forests taxation maps and others) was performed. Characteristics of structural-dynamic organization of forest communities in mine surrounding area and at the sites of wholes of different years of conservation reflects the vector of forests reconstitution. The conditions of ecotopes of phytocenoses for each concrete hole were taken into account. Primary forecast of probable vegetation destructions at further increase of technogenic impact is shown as well.