Monitoring of plant migration activity between open and protected ground

Monitoring of the migration activity of plants spontaneously dispersing between open and protected ground was organized with a certain frequency in greenhouse complexes of the N.V. Tsitsin Main Botanical Garden of the Russian Academy of Sciences (MBG RAS, Moscow). The relevance of this study is the identification of species that, due to their adaptive capabilities, aggressive distribution and climate warming, may pose a potential danger as alien taxa. A total of 174 species from 123 genera of open-ground plants were identified around all greenhouses of the MBG RAS (within 15 meters), most of which are local and alien weeds. Only 32 species from 28 genera of open-ground plants were found on the greenhouse basement and even fewer were found in the protected ground - 24 species from 22 genera. Only 4 species of plants of protected ground were found on the outside basement of greenhouses, and 3 species belong to ferns. The only flowering plant Cymbalaria muralis, was repeatedly found both on the outer walls and in the cracks of greenhouses, and at a distance of up to 15 meters from the greenhouse buildings. In the open ground, this plant forms populations of up to several dozen specimens, blooms profusely and forms fruits with viable seeds that can successfully overwinter in deep recesses of walls, or under snow.