Didur O. Biogeocenotic features of alder forests ecosystems of Ukraine south-east regions (recruitment, control and rational usage).

The objects are the nature alder forests. The aims are to study an ecological properties of natural alder forest ecosystems of south-east region of Ukraine and to elaborate the recommendations for its recruitment, control and rational usage. The methods are generally accepted ecological-biogeocenological, geobotanic, statistical. Levels of occurrence of different types of alder forests subterranean waters and their chemistry were determined. Results of investigations of macro- and micromorpholodgical, water-physical and water-chemical peculiarities of examined alder forests characteristics are given. Peculiar properties of interaction of leaf litter and soils of alder forests biogeocenose were determined during laboratorial experiment. Vegetation, taxonomic structure, algoflora soils life-forms and alder forests soil-litter fauna are described. Flora of different types of alder forests was ecomorphically analysed. Level of knobs formation on a black alder trees roots in different types of alder forestwas estimated. List of rare and disappearing plants species is made up. Recommendations for recruitment, control and rational usage of alder forest of south-east region of Ukraine are given. The spheres of use are nature protection and training courses.