Syntaxonomic and ecological peculiarities of extra-zonal pine forests with participation of Acer negundo L. from the forest-steppe and steppe zones of Altai Krai (South-Eastern Siberia) 

The syntaxonomic analysis of pine forests with Acer negundo occurring on fluvio-glacial sandy deposits Altai Krai (South-East Siberia) was made based 93 releves. It established that takes a different phytocenotic part in 2 associations, variants, and 6 no-ranked communities 4 classes orders according to the Braun-Blanquet approach. method detrended correspondence (DCA coordination) implemented DECORANA software package used confirm ecological floristic integrity identified vegetation units. New data spatial syntaxa distributions depend complex humidity gradient, soil fertility, anthropogenic factors. is most abundant common Brachypodio-Betuletea pendulae class, which are characterized by habitats moderate moistening greater fertility. In series considered, fertility gradients, we observe an increase Vicia sylvatica – Pinus sylvestris community activity mesophytes mesohygrophytes more demanding