摘要：The present work analyses the indices of aggregation, dispersion, expansion, dominance and receptivity of lumbricidae fauna in a grassland located in the high hills of Piedmont Candesti in the south - east of Arges County. The higher aggregatio n of species in the grassland, in certain months expressed a lower number of points with optimal food and physiological conditions. It also emerges the idea that, a higher density of the population caused a higher degree of expansion, which gave the specie s a determining role within the biogenesis.
