Brygadyrenko V. Ecological patterns of forming litter invertebrate fauna in forest ecosystems of steppe zone of Ukraine.

The objects are natural, simulated and anthropogenic transformed forest ecosystems of steppe zone of Ukraine, animal population of their litter biogeogorizont. The aim is to study the ecological features of litter invertebrate fauna complexes formation in conditions of forest ecosystems of Steppe zone of Ukraine. The methods are geobotanical description, chemical analysis, methods of soil-zoological researches, laboratory contents of invertebrate animals, statistical analysis, simulation modeling. The models of trophic nets consisting of two and three trophic levels are built. The method of topological spectrum for zoological diagnostic of the natural and anthropogenic-transformed ecosystems is designed. The effect of anthropogenic factors on complexes near-water and simulated forest ecosystems of steppe zone of Ukraine is estimated. The guidelines in optimization of litter fauna as the constituents of increase of a system stability of forest ecosystems in conditions of geographic existence disharmonyare designed. The spheres of use are environmental protection, reserved business and training courses.