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About two associations of the Ob river alluvial vegetation, Tomsk region
Authors: Taran G.S., Tyurin V.N., Dyachenko A.P.
Number of views: 302
Ephemeral floodplain vegetation communities and meadows dominated by Petasites spurius are studied on the south taiga reaches of the Ob River, Tomsk Region, Russia. The ephemeral floodplain vegetation is identified as association Rorippo dogadovae-Limoselletum aquaticae Taran 2005 (Eleocharition soloniensis Philippi 1968, Nanocyperetalia Klika 1935, Isoëto-Nanojuncetea Br.-Bl. et Tx. in Br.-Bl. et al. 1952). On the north of the south taiga reach of the Ob River, the association is represented by subassociation R.d.-L.a. rumicetosum ucranici Taran 2005 and its new variant: Juncus nastanthus var. nov. On the south of the south taiga reach of the Ob River, peculiar ephemeral plant communities are spread. They are described as R.d.-L.a. juncetosum nastanthi Taran in Taran, Tyurin et Dyachenko subass. nov. The meadows dominated by Petasites spurius are spread on the Ob River sandy banks from Krasnyy Yar village on the south to Kolpashevo town on the north. They are described as Physcomitrello patentis-Petasitetum spurii Taran, Tyurin et Dyachenko ass. nov. (Agrostio stoloniferae-Equisetion arvensis Taran 1997, Oenanthetalia aquaticae Hejný in Kopecký et Hejný 1965, Phrag-mito-Magnocaricetea Klika in Klika et Novak 1941).