The bubble chart of relative abundance of predominant fungi in the DryK, InsG and CasM at the species level. DryK, InsG and CasM represent Dryocosmus kuriphilus, associated insect galls and the galled twigs of Castanea mollissima, respectively. The area and color of circle show the relative abundance of predominant fungi in the DryK, InsG and CasM. The relative abundance is expressed as the percentage of predominant fungi in the total fungi. The Ascomycota species indicates unclassified species of the Ascomycota phylum. The Capnodiales species indicates unclassified species of the Capnodiales order.