Files in this Data Supplement:

• Supplemental file 1 - Percentage of major bacterial groups found in oiled rocks and sand, depending on the methodology of study (Table S1); BLASTN comparison of the DGGE bands’ sequences from the total profiles (Table S2) and the hydrocarbon-degrading profiles (Table S3) of polluted rocks and sand samples with those stored in GenBank; 16S rRNA gene clone library results from oiled rock and sand samples (Table S4); strains isolated from the polluted rock sample (Table S5) and the oiled sand (Table S6) by using different media; total ion chromatogram of the aliphatic fraction of the oiled rock sample (Fig. S1); source diagnostic ratios of the Prestige fuel oil and rock and sand polluted samples (Fig. S2); relative distributions of n-alkanes and polycyclic aromatic hydrocarbons with respect to the major peak in the Prestige oil and rock and sand polluted samples (Fig. S3); principal-component analysis scatter plot of DGGE profiles (Fig. S4).
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