As a result of drying, bank mud splits up the typical polygons. V.Tyurin. On the top of a flood, rapid whirlpools create similar erosion hollows. Middle Ob floodplain, Surgut vicinities. V.Tyurin. Typical view of the newest riverine zone: ribbons of young osier forests and clumps of pioneer species. Ibid. V.Tyurin. Mentha arvensis is one of the typical pioneer species. Ibid. V.Tyurin. Another view of the newest riverine zone with Rorippa amphibia and Arctophila fulva in the foreground. Ibid. V.Tyurin. Salicetum triandro-viminalis's stands on a flood recession. Ibid. V.Tyurin. A wetting in the central zone of an island. Upper Ob floodplain. I.Smelyanskiy.
The combination of Phalaridetum arundinaceae's grasslands and osier forests is typical for ripe areas of riverine zone. Middle Ob floodplain. V.Tyurin. Typical view from Ob island. Middle Ob floodplain. V.Tyurin. Typical view of Ob island central zone with combination of shrubby osier-bed and tall sedge fens and meadows. Surgut city vicinities. G.Taran. The same place, a view along a channel. G.Taran. Typical combination near terrace above Ob floodplain: tall sedge fens, Salix lapponum stands and ribbon of low birch swampy forest (Betula pubescens). Surgut city vicinities. V.Tyurin. Typical view of holocene terrace: lazy channel with brown water, thick and narrow ribbons of asp and birch forests and impassable hummocks outside. Lower Ob, G.Taran. Species composition of wet earth roads can be very motley. Middle Ob floodplain, Surgut vicinities. V.Tyurin.
In pebbly floodplain of middle Charysh river, poplar forests (Populus laurifolia, P.nigra) are dominating stands. I.Makunin. Middle Charysh floodplain is accompanied by roundish hills. I.Makunin. Cyperus fuscus community (yellowish strip) on the muddy bank of middle Aley. I.Makunin.

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