Vagalyuk L. Ecological bases of conservation of agro-biodiversity of insect dendrobionts in the North Forest Steppe Zone of Ukraine.

The dissertation is devoted to the preservation of entomological diversity of the North Steppe Zone of Ukraine. For the first time on the results of analytical and fauna studies have established the state of entomological diversity of insect dendrobionts of agrolandscapes of the North Forest Steppe Zone and defined it as essentially impoverished to 40%. The features of seasonal population dynamics and the level of species diversity of insect dendrobionts that depend on the type and condition of agrobiocenosis that border belts. Entomological indexes of species biodiversity (in the Shannon-Weaver index) of tree and shrub plantings bordering on fallow, agriculture of winter wheat and clover are 4.1, 3.8 and 3.6 respectively. The study of trophic relations of dendrobionts indicates that the available diversity of tree species is able to fully provide shelter and trophic resources, only 38% of the mass of insect dendrobionts of the North Forest Steppe Zone. It was established that the species richness of forest belts are extremely impoverished as compared with the recommended taxonomic structure. It was theoretically proved that to maintain ecological stability of agricultural landscapes and the conservation of agricultural biodiversity, it is necessary to turn forest belts in the connecting area, which will provide links between key areas and determine the integrity of the ecological network.