River valleys as the object of ecological and geobotanical research

The river valleys are characterized by high diversity of ecosystems, their originality, complex structure and dynamics. Changes in vertical displacements from the plain to channel in various parts of atena, which can be seen as an intricate complex integrating coenoses formation, geomorphological and pedogenic processes, are very important. Plant communities serve as indicators of territorial and temporal changes. Combinations of the communities within the ecological series influenced by environmental factors are characterized as 'ecomers', which reflect the trends of ecosystem changes, i.e. -coenodiversity.