The sequencing files have first been downloaded from NCBI SRA. Second, taxonomic assignation has been performed on each file using Kraken 2, a metagenomic and metabarcoding assignation tool, with a reference database built from the MIMt sequencing enriched with custom sequences. Using the associated metadata, each sample has been associated to categories from the OntoBiotope ontology. A database containing the abundances expressed in proportion of reads in each sample of each genus and each species was built to have a global overview of the places where they can be found. Various filters are available to include or exclude samples based on geographic location, ontology categories or abundances.
