In this article we are looking for linkages among the epigeic macrofauna (Curculionoidea, Insecta: Coleoptera), xero-thermophilous grassland communities and sun radiation. An approach is proposed which integrates a data model, a statistical model and an ecological model using sophisticated Geographic Information Systems (GIS). This approach is based on a more realistic representation of vegetation – macrofauna patterns with transitional gradients from one to another. We focus on the impact of shading on their species richness and characteristics of formed communities. In the area of interest, we set three sites, the sites L1 and L2 are through the NW orientation at a relatively cooler sector with Geranion sanguinei and Berberidion vulgaris. Site L3 consists of low grassland communities. Due to shallow soil (Lithosol) and abiotic characteristics (slope aspect and slope) of environment live here plant species (more drought tolerant) of Festuco-Brometea (close to Poo badensis-Festucetum pallentis association). From superfamily Curculionoidea, we collected 180 ex., two families, 18 genera and 28 species. In grassland community L1, we collected 3.379 individuals, in the shrub community L2 3.038 individuals and in xerothermic community L3 2.159 individuals. Species richness and abundance declined with increasing levels of shade in transect of sites connectors L1 – L2. The highest diversity, equitability and lowest dominance index – which indicate the most stable community, with the most balanced conditions, the greatest diversity of vegetation and also with the highest potential, we have identified in the grassland community L1. The opposite was true for the hottest area L3 with sparse vegetation, which showed the lowest equitability, the highest dominance index and the lowest total diversity.