ARCHAEOPHYTES IN THE FLORA OF EUROPEAN RUSSIA

Abstract

The division of alien species into groups according to the time of invasion is widely used in biogeographic and floristic studies, but such information is not available for many regions of Russia. Based on the analysis of regional floras of European Russia (ER), 184 species of archaeophytes (i.e., alien species intentionally or unintentionally introduced by humans in the early historical period, until the end of the 16th century) were identified for ER regions. The substantiation of the prescription of their invasion was carried out by a number of criteria (type of habitat, presence of fossils and historical evidence, geographic distribution, frequency of known naturalizations, identification of possible means of introduction, human use). Some species are archaeophytes only for a part of the ER regions; in neighboring areas, they can be either species of natural flora or alien neophytes according to their status. Eighty one species of the archaeophytes are confirmed by archaeobotanical data belonged to some of the early historical periods, mostly to the Middle Ages, but from a limited number of regions. Taking into account the peculiarities of natural conditions, as well as the history of the development of anthropogenic cultures, the territory of the ER is divided into six regions: Karelian-Kola, East-Baltic, Dvina-Upper-Volga, Volga-Don and South-Eastern. For each of the big regions, the more or less unified set of archaeophytes has been proposed. For the entire group of archaeophytes in ER as a whole, it should be noted 1) the great similarity of the composition of archaeophytes with other European regions, 2) the low diversity compared to European countries, given the large area of ER, 3) the heterogeneity of the status of species in different regions and differences between different parts ER by species composition, 4) a large proportion of segetal weed species as a result of high contamination of crops with weed species at the beginning of the development of agricultural culture, 5) a significant percentage of species of Asian origin as evidence of the influence of eastern vectors on the formation of flora, including the eastern centers of agricultural culture. For a significant part of the species from the list of archaeophytes, species factsheets are presented according to the criteria mentioned above.