Habitat Distribution Patterns of Nemoral Relict Plant Species on the Khamar-Daban Ridge (the South of Eastern Siberia) According to Grid Mapping Data

Y The results of large-scale grid mapping of relict plant species (Anemone altaica Fisch. ex C.A. Mey., A. baicalensis Turcz., Corydalis bracteata (Steph.) Pers., Eranthis sibirica DC., Primula pallasii Lehm., and Waldsteinia ternata (Steph.) Fritsch) within the nemoral refugium on the northern slope of the Khamar-Daban Ridge (the Republic of Buryatia) are given. Mapping was carried out in the lower part of the Bolshoi Mamai River basin in a model area (25 km(2)). The research results have confirmed the general pattern for South Siberian nemoral relics, namely, their confinement to valleys and banks of rivers and streams. At the same time, the studied species differ in their habitat preferences, including their ability to spread beyond river valleys, the range of preferred altitudes, and their resistance to disturbance of vegetation. Cluster analysis and assessment of species relationships using the nonparametric Kendall concordance coefficient have confirmed concordant spatial distribution patterns of the model species.