Abstract
By means of an analysis of the physical factors: relative humidity, temperature, light and biological factors: producer organisms, consumer organisms, descompounder organisms and abiotic substantias, is possible to obtain a Model about tlie energetic relations and energy-matter flows, through different trophic levels and their interaction inside Cueva del Indio. This ecologycal system, is based in intra and inter-specific com- petitions like predation of species, parasitism and cannibalism. This cualitative model shows how organisms become an autonomous and specifíc functional unit with the envi- romment, Cueva del Indio, where ecologycal barriers depend on its evolutionary chan- ges as adaptation to low energy resources.