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![Study area: 1 -the Ob River floodplain boundaries; 2 -administrative boundaries of Aleksandrovsky district and Tomsk oblast Результаты исследования и обсуждение В эколого-флористической классификации тополевые леса Александров-ского отрезка Оби выделены в ассоциацию Anemonidio dichotomi-Populetum nigrae Taran 1993, входящую в союз Equiseto hyemalis-Populion nigrae Taran 1997, порядок Salicetalia purpureae Moor 1958 и класс Salicetea purpureae Moor 1958 [15, 16]. Диагностические виды асс. Anemonidio dichotomi-Populetum nigrae: Populus nigra (доминант), Anemonidium dichotomum, Lathyrus palustris, Lathyrus pilosus, Ptarmica cartilaginea. Номенклатурный тип (holotypus) -описа-ние 4* в таблице.](profile/Georgy-Taran/publication/301920474/figure/fig1/AS:815308528947200@1571396109187/Study-area-1-the-Ob-River-floodplain-boundaries-2-administrative-boundaries-of.png)
Study area: 1 -the Ob River floodplain boundaries; 2 -administrative boundaries of Aleksandrovsky district and Tomsk oblast Результаты исследования и обсуждение В эколого-флористической классификации тополевые леса Александров-ского отрезка Оби выделены в ассоциацию Anemonidio dichotomi-Populetum nigrae Taran 1993, входящую в союз Equiseto hyemalis-Populion nigrae Taran 1997, порядок Salicetalia purpureae Moor 1958 и класс Salicetea purpureae Moor 1958 [15, 16]. Диагностические виды асс. Anemonidio dichotomi-Populetum nigrae: Populus nigra (доминант), Anemonidium dichotomum, Lathyrus palustris, Lathyrus pilosus, Ptarmica cartilaginea. Номенклатурный тип (holotypus) -описа-ние 4* в таблице.
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Citations
The review of the plant communities of the class Salicetea purpureae
Moor 1958 of Lower Volga Valley has been carried out. The Lower Volga Valley
vegetation database was used for this purpose. The database was created using the
computer program TURBOVEG. Now it includes a total of 15022 relevés, recorded
on the territory of the Lower Volga Valley in the period from 1924 to 2013. Expert
system based on the method «Cocktail» applied for recognition of relevés that can
be attributed to the associations listed above and occurring in the Lower Volga Valley.
The characteristics of 10 associations of the class Salicetea purpureae in this
region is given. Associations in which plant communities are dominate by bushes are
subject to the alliance Bidenti frondosae–Salicion triandrae Golub et
E.G. Kuzmina 2004, and trees – to the alliance Asparago–Salicion albae Golub
2001.
Natural poplar (Populus nigra, Populus alba) forests of the Ob River were studied on the northern border of south taiga subzone (vicinities of the town of Kolpashevo, Kolpashevo district of Tomsk Region, 58º18′ N, 82º54′ E) on the floodplain segment formed in 1890–1970. They belong to association Anemonidio dichotomi-Populetum nigrae Taran 1993 (Equiseto hyemalis-Populion nigrae Taran 1997, Salicetalia purpureae Moor 1958, Salicetea purpureae Moor 1958) and 2 subassociations: Anemonidio dichotomi-Populetum nigrae typicum Taran 1993 and Anemonidio dichotomi- Populetum nigrae rubetosum saxatilis Taran subass. nov. The poplar forests were examined from young timber stage of black poplar (Populus nigra) to stage of its total extinction. General direction of the poplar forest succession is expressing in a replacement of black poplar stands by birch ones. On sandy soils, black poplar stands are changed by small-sized Scotch pine ones. At the middle stages of the succession, white poplar (Populus alba) plays a significant role, occasionally along with Populus ×canescens. However, white poplar doesn’t form stable stands near the town of Kolpashevo as it grows there at the northern border of its areal in Western Siberia. In studied poplar forests, the average species saturation was 42.4 and 14.4 species per 100 m2 for vascular plants and for mosses respectively. On the whole, 123 species of vascular plants and 34 species of mosses were registered in the poplar forests.
