Box Table 1 Statistical tests on the Bray–Curtis dissimilarity for the gut mycobiota of four species of wild rodents (bank vole, Myodes glareolus, wood mouse, Apodemus sylvaticus, striped field mouse, A. agrarius, and yellow-necked mouse, A. flavicollis). Statistical tests were performed using the adonis2 function in r package vegan to (1) examine whether host species, sampling year and/or total absorbed dose rates of radiation (µGy/h) explained variation in beta diversity when all fungal sequence variant (SV) groups are included in the analysis, and (2) to compare explained variation with the analyses based on filtered SV data that either include only the likely resident or non-resident gut fungi