The main factors controlling florogenisis on rocky outcrops in southern Primorye

Botanical Garden-Institute FEB RAS, Vladivostok, Russia

The flora of rocky outcrops of the southern Primorye is the richest in the Russian Far East. The reasons are the variety of landscapes and rock formations, the location of the territory in the area of the passage of important botanical and geographical boundaries and historical events. Rock outcrops in southern Primorye revealed 573 species of higher vascular plants that contain 228 species of rock flora proper. Analysis of areas shows that the rock flora of southern Primorye is mainly autochthonous within the East Asian floristic region. A feature of the rocky flora in the southern of Primorsky krai is a small fraction of species, that are narrowly adapted to growth on the rocky outcrops. The composition of the rock vegetation, as an azonal type within the forest zone, is formed primarily from elements of the zonal vegetation types (nemoral coniferous-deciduous and deciduous forests, forest-steppe and steppe), and some elements of azonal vegetation of the upper mountain zone. Many of these rocky outcrops act as refugia and many species south of Primorye are on the boundary of their distribution and are part of the border and islands areas. Based on the distribution of such locally common species we identified three vectors of the influence of various floras that contribute to the rocky flora in the south of Primorsky Krai. Major changes in the climatic conditions that occurred during the historical periods in the seashore areas of East Asia, including southern Primorye are reflected in the peculiarities of certain flora of rocky outcrops. In general, we consider the regularities of formation of the rocky flora in south of Primorye to be connected with the seashore area and select the model of florogenesis with the same name.

© 2012 Organizing Committee