title: Pryrosequencing data: ultramafic soil Barazón (NW Spain)3
design: Sequences matching the barcode and primer were selected for BLASTN analysis using the SILVA 16S rRNA gene database. Low quality sequences or chimera resulting in a short alignment were filtered out. The unpaired regions were truncated based on the BLASTN reports. Only those sequences with a length above 200 bp were subjected to further analyses.