Семейственные спектры флоры и спектр индексов разнообразия семейств

Abstract

The family spectrum as an element of taxonomic analysis of the flora remains an important component when considering the floristic features of any territory. According to the experience developed in comparative floristry, it is customary to focus on the sequence of the leading families, which reflects environmental conditions. The article deals with the spectrum of family diversity indices, as well as the criteria for assessing the stability (naturalness of the addition) of the flora. It was noted that violations of the established threshold values indicate either insufficient knowledge or anthropogenic disturbance of the territories. This approach allowed a comprehensive assessment of the state of the flora for 27 municipal districts of the Samara region and 17 administrative units of the Volga Basin. The results showed that the considered territories are characterized by a certain degree of stability, which is based on the availability of specially protected natural areas (reserves, national parks, federal and regional nature monuments) that contribute to the preservation of phytorrhage.