Historical Aspect Of The Flora Invasibility Of The North Western Part Of The Great Caucasus

The northwestern part of the Greater Caucasus is characterized by high invasiveness of the flora -
12% of the entire flora. The reasons for this lie in the natural phytocenotic background, differing in
the abundance of ecotone communities. The main reason is connected with the history of peoples and
ancient civilizations, concentrating in the region the history of the anthropogen. Since the ancient
stone age, people have migrated to this part of the Caucasus, attracted by favorable natural and cli-
matic conditions, richness and accessibility of food resources, a variety of landscapes. Beginning with
the Bronze Age, long migrations of the builders of Mediterranean localites begin, the end of the first
millennium before the new era - this is Greek colonization, in the early and late Middle Ages - this is
the numerous nomadic steppes - all this was accompanied by the spread of adventive species. In the
late XIX and early XX centuries the process of deliberate introduction and distribution of transform-
ers is intensifying.