THE ECONOMIC IMPORTANCE OF THE BIODIVERSITY OF THE INVERTEBRATES FAUNA IN THE CORN CULTURE SOIL IN COPSA MICA (SIBIU COUNTY) ROMANIA

The goal of our researches is in bringing the scientific arguments of the necessity of including the biologic parameters, mainly of the invertebrates in the soil, in the evaluation studies of the impact upon the environment and the national strategies of monitoring of the soils quality. If the chemical analysis measure the quantity of the polluters, the invertebrates in the soil, especially the insects, reflect intensively the anthropologic influences, emphasizing the intensifications or inhibitions of their activity under the stress conditions. The study upon the invertebrates’ fauna was carried on in Copşa Mică area (Sibiu County) in the corn agricultural ecosystem. The properties of the soil in this area are strongly changed by the industrial activity as a result of an accumulation of great quantities of heavy metals (lead, cadmium). The researches in this area are a part of a greater study upon the invertebrates’ fauna in the corn culture soil of the Sibiu County, researches that took place during 2011-2013. The technology applied in this area is a semi intensive one. For collecting the invertebrates there were used two methods: drilling the soil and pitfall traps. There were identified invertebrates belonging to 4 classes (Annelida, Arachnida, Chilopoda, Insecta) and 11 orders (Haplotaxida, Aranea, Acari, Lithobiomorpha, Geophilomorpha, Collembola, Orthoptera, Heteroptera, Hymenoptera, Coleoptera, Diptera).