Abstract: “The quality of ecosystems becomes a challenge, increasingly emphasized for the scientific community, in the sense of identifying viable ways of rehabilitating and maintaining them for a sustainable ecological coherence. The paper aims to develop an index of the quality of ecosystem services based on the analysis of the following components: plant production, animal production, livestock farming and tourism. For the construction of such index, a series of econometric models useful for quantifying the quality of ecosystem services, regarding the dependence between agricultural production, the number of bee families, the amount of natural fertilizers used, the agricultural surface, on the hand and the dependence between the number of nights, number of tourists, number of pensions, on the other hand, are developed.”

Keywords: ecological coherence, ecosystem services, statistical index