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The distribution boundaries of light-coniferous and deciduous forests formed by larch (Larix cajanderi Mayr), stone-birch (Betula ermanii Cham.), white birch (Betula platyphylla Sukacz.), poplar (Populus suaveolens Fisch.), chosenia (Chosenia arbutifolia (Pall.) A Skvorts.), alder (Alnus hirsute (Spach) Turcz. ex Rupr.) and willow trees (Salix udensis Trautv. et C.A. Mey., S. schwerinii E.L. Wolf), as well as elfin wood communities formed by Siberian dwarf-pine (Pinus pumila (Pall.) Rgl.), dwarf-alder (Alnus fruticosa Rupr.), and dwarf-birch (Betula middendorffii) have been clarified for the North of the Koryak Region. The remote sensing data, aerial photographs, original relevés and itinerary research data were used for small-scale forest vegetation mapping. A map of forests and elfin woods allocation in the mainland part of the Koryak Region was compiled. With the help of this map, the boundaries of the new geobotanical subdivision of the North of Koryak Region will be clarified and the most important phytogeographical boundaries within the Beringian forest-tundra zone will be determined.

The goal of the study was to elucidate the peculiarities of changes in the coverage of medical plants in the course of regeneration successions after clear cutting. 650 sample plots of different stages of succession and types of forest growing conditions were analyzed. It appeared that some species increased their coverage and some of them decreased it. The large group of species did not react to the cutting of the stand.

The distribution boundaries of the two birch species communities: Stone-birch (Betula ermanii Cham.) and White birch (Betula platyphylla Sukacz) forests have been firstly reliably established for the North of the Koryak Region. The remote sensing data, aerial observations, original relevés, and itinerary research data were used. A map of the Stone-birch and White-birch forests allocation in the mainland part of the Koryak Region was compiled. It was shown that Stone-birch groves were found in relatively warmer and wetter areas adjacent to the Bering Sea coast. They occupy Southern and South-Eastern slopes of the Koryak Upland spurs; whereas White birch forests are common in the continental districts. They are found in the valleys of the rivers Penzhina, Talovka, Belaya, Oklan, Apukvayam, on the Penzhinskiy Ridge slopes. Stone-birch forests do not occur North of 62° northern latitude, do not overcome the boggy depression of Parapolsky Dale, and do not occur to the West of 167° 30' eastern longitude. The natural phytogeographical boundary between the areas of the two birch formations are the Southern and South-Eastern spurs of the Koryak Upland.

The goal of the study was to classify the forest sites of St. Petersburg area. The urban forest typology based on a set of 630 sample plots of 20×20 m each, located in the parks, gardens, urban forests, and natural reserves was elaborated. The 25 forest site types were distinguished.