XVI International Botanical Congess

Mire was investigated in Leningrad region in environs of Luga Bay of Baltic Sea. The different types of mire were revealed and described. New mire complex have arisen by the process of terrestrialization of ancient like ALeshiy@. The like is shallow, a depth of peatlands fluctuates from 0.5 to 1.2 m. There are oligotrophic wooded centre and transitional (mesotrophic and mesooligotrophic) mires in the margin parts. Another type of mire - mires have been situated in inter-swell basins. These mires have developed from ancient lagoon marshes of Baltic Sea. The mires between sand relief elements make up a striped aspect of landscape. A nutrient status these mires is mesooligotrophic. Besides, we discovered a rounded mesoeutrophic fens between dunes. The rare species of sphagnum were collected on all type of mires. As well an interesting phenomenon was founded - a spring fen on early phase of development. It is to be emphasized, that a building of coal seaport and its infrastructure presents a threat for the existence and the natural function of mires.