About the use of the family naturalization index as an indicator of the success of invasive species
УДК 581.527.7(470.40/.43)
Abstract
The use of the family naturalization index as an indicator of the success of the naturalization of a particular family in the regional flora is considered on the example of the alien flora of the Middle Volga Region. Currently, the total number of alien plants registered in the flora of the Middle Volga Region is 461 species, or 23.1% of the total regional flora. For the analysis, 10 of the most alien species-rich families were taken. It is revealed that the most successful invaders in the flora of the Middle Volga Region are representatives of the families Chenopodiaceae, Brassicaceae, Rosaceae and Poaceae. The Solanaceae family is characterized by an exceptional predominance of alien species in its composition, as well as a relatively high index of naturalization. The Apiaceae and Caryophyllaceae families are characterized by a smaller number of alien species, but the naturalization index of these families was significantly higher than that calculated for Asteraceae, Lamiaceae, and Fabaceae families. Thus, the regional material confirms the conclusion of P. Pysek (1998) that the largest number of potential invaders is contained in the Chenopodiaceae, Brassicaceae and Poaceae families. The use of the family naturalization index in the analysis of alien species is one of the ways to study the trends and mechanisms of flora formation in anthropogenically disturbed territories.
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