In addition to further faunal research in the Balkans and Serbia, in order to obtain detailed information on the ecology, distribution and zoogeography of lumbricid species, with special reference to endemic species, the specific goal is to assess the degree of stability and threatened biodiversity of terrestrial ecosystems in Serbia and the biocontrol potential of certain species. Field work, sampling and material processing. Research that would be conducted within the ecotoxicology part would aim to detect developmental, morphological and physiological changes in test organisms from the Lumbricidae family, under the influence of various agents.