Distribution of the adventive species <i>Galinsoga parviflora</i> and <i>G. guadriradiata</i> (Asteraceae) in the south of the Far Eas

Abstract

The results of the study of the stranger American species Galinsogaparviflora and G. guadriradiata in the south of the Primorsky Territory (Russia) are presented. Field studies were conducted in 20182022 on the territory of the Primorsky Territory in urban and rural settlements, in specially protected natural areas (V.L. Komarov Ussurisky Nature Reserve). Literary data, information from Internet resources, herbarium specimens have been analyzed. Studies have found that over the past 30 years, the invasive range of species of the genus Galinsoga in the south of the Far East has increased significantly. At present, in the Primorsky Territory, these adventive species actively disperse over anthropogenically transformed territories (roadsides, abandoned fields and meadows, city parks and squares, adjacent territories, construction pits, etc.) and are noted in most administrative-territorial districts of the region. Galinsoga species have a sporadic distribution in the northern and eastern parts of the region. G. guadriradiata and G. parviflora grow en masse in the areas with developed agriculture (western and central Primorsky Territory). In Vladivostok, several large herbaceous communities are noted with dominance of G. guadriradiata, up to 100 m² in area with projective coverage of 90-100%. The penetration of species of the genus Galinsoga into specially protected natural areas is of great concern. Therefore, further monitoring of the invasive range of these species in the south of the Russian Far East is necessary.