Abstract
The coastal forests, presented by valuable deciduous and coniferous forests, grow in the northeastern and eastern parts of the Volga region of the Republic of Tatarstan, skirting the high right bank of the Volga River. They contribute to the maintenance of biological diversity in nature. The study of the formation of coastal forest phytocenoses, their species diversity and the modern state is now urgent work, and development activities for the conservation of natural habitats of plants, improve the sustainability of forest ecosystems are perspective direction. According to research of the forests of the right bank of the river Volga, we present the structure of coastal forest ecosystems. The association of forest ecosystems to the various elements of the relief was installed. The types of soil and litter were presented. The estimation of α-diversity of vascular herbaceous plants and ß-diversity of the studied forest ecosystems were reported. The largest number of species of vascular plants in coastal forests are: oak plant communities; a second group includes birch plants, pine and willow; the third group - the lime and larch; the fourth group - maple plant communitie. The ß-diversity index (Whittaker’s index) of plants in the studied forests varies between 2.2-6.8. The Jaccard coefficient of floristic similarity between forest ecosystems varies from 0.01 to 0.30, which confirms the diversity of generated by coastal forest ecosystems. The greatest diversity of plants was found in forests of ash and mixed grass, mixed grass willow, oak and lime-grove, maple, ash and mixed grass larches, birch wood. The forestry activities in coastal areas should be aimed at creating productive, sustainable forest ecosystems with a rich biodiversity of flora and fauna.
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