Negative DNA extraction control: ITS1, ITS2, 16S, CO1 amplicon sequencing data, prepared using DNA in DNA extration procedure.
Amplicon sequencing library targetting V4 region of 16S bacterial rRNA (as in Apprill et al., 2015 and Parada et al., 2016), ITS1 region of ITS fungal rRNA  (as in Gardes and Bruns, 1993 and White et al., 1990), ITS2 region of ITS fungal rRNA  (Pitkaranta et al., 2008 and White et al., 1990), and a 418 bp portion of the mitochondrial cytochrome oxidase I (COI) gene (as in Elbrecht et al., 2019) using DNA extracted from the infrabuccal pellet of Formica polyctena ant as a template.