Buslenko L. Lumbricids (Oligochaeta: Lumbricidae) as a structural element of biogeocenoses of Volyn Polissia.

The object is lumbricids' synecological organization of complexes in the soils of Volyn Polissia. The aim is to study the of lumbricids' structural and synecological complexes in the soils of Volyn Polissia. Methods - pedozoological methods, complex analysis, statistical methods. Full regional studying of the soil oligohets of Lumbricidae family as a structural element of natural and anthropogenuously changed biogeocenoses has been made. The species composition of lumbricids which is represented by 17 species, has been ascertained. Edaphotopic distribution of the earthworms which is subordinated to coenotic-typological differentiation of the region plant groupings has been analyzed. The dynamics of lumbicids' number, ecological valency and relationship to the soils have been studied. The influence of such principle factors as temperature, humidity, gas conditions, actual acidity, oxidation-reduction potential on the soil oligohets of Lumbricidae family has been investigated. The principal limiting edaphic factors of influence on the formation of lumbricids' complexes of biogeocenoses have been established. The peculiarities of lumbricids' reaction on the effect of extreme bodies of concrete edaphic factors have been studied. It is shown by the investigation that the most widespread anthropogenuous factors which influence on the formation of earthworms' complexes in the biogeocenoses of Volyn Polissia are overconsolidation, hydromelioration and deflation. Spheres of use are preservation and reproduction natural pedobiocenoses.