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摘要: The Sierra de Cazorla, Jaen, Spain, is characterizedby the presence of a number shelters or smallcavities with important late prehistoric paintings,the so-called schematic rock art painting. Themicrobial population rocks supporting paintingsfrom two was investigated. Bacteria isolatedfrom Cueva del Encajero triplicated ofthose isolated from la Graja, as correspondedto higher environmental humidity. However, thebacteria Graja weremetabolically more active and able to use highernumber carbon sources than those delEncajero. As demonstrated by cluster analysis themicrobial communities both are related,in spite different ecological conditions andgeographical distribution.