Растительность болот в бассейне реки Муроягун (Сургутское Полесье, Западная Сибирь)

Abstract

The author’s field research, performed in July 2000, was aimed at the descriptive survey of the diversity of mire vegetation in the poorly known West Siberian area, the so called Surgut Polesje. The palsa ridge-and-lake and palsa ridge-and-pool bog complexes dominate the area landscape. Such bogs make for the core of vast and heterogeneous mire systems, the other elements of the latter being transitional bogs and treeless or wooded fens. The mire systems are separated from each other only by rivers; the fens are located on river valley slopes. The following mire vegetation complexes (mire sites) were described: 1) oligotrophic palsa ridge-and-lake or palsa ridge-and-pool; 2) palsa ridge-and-hollow; 3) meso­trophic or heterotrophic aapa-mire; 4) mesotrophic-eutrophic sedge or sedge-peatmoss poor fen; 5) wooded sedge fen with low Betulatortuosa; 6) wooded sedge fen with one or two layers of Pinussibirica and Betulapubescens. The investigated mire vegetation displays a high degree of syntaxonomical diversity, belonging to the 4 classes, Oxycocco-Sphagnetea, Scheuchzerio-Cariceteanigrae, Phragmito-Magnocaricetea,and Alneteaglutinosae, with 4 orders, 6 alliances, and 8 associations, listed in the tables. There are no rare communities in the area, to the possible exception of some types of wooded sedge fens. The mire system margins along rivers and flowing lakes seem to be potentially most interesting for a vege­tation scientist.