Relationship between plant and fungal functional groups.

<p>(a) Proportion of plant–fungal association (<i>P_ij</i>) in terms of fungal functional groups. Results are shown for fagaceous, non-fagaceous, and all (fagaceous+non-fagaceous) plant species. In total, 521, 2516, and 3037 plant–fungal associations were observed for fagaceous, non-fagaceous, and all plant species, respectively. EcM, ectomycorrhizal fungi; AM, arbuscular mycorrhizal fungi; Unknown, fungi with unknown ecological functions. (b) CLAM analysis of fungi on fagaceous and non-fagaceous plants. Fungal OTUs were classified into the following categories: fungi preferentially associated with fagaceous plants (diamond), fungi preferentially associated with non-fagaceous plants (square), fungi commonly associated with both fagaceous and non-fagaceous plants (circle), and fungi that were rare in both types of host plants (triangle). (c) Proportions of associated fungal functional groups for each plant species. The proportions of associations that involved EcM and AM fungi as well as fungi with unknown ecological functions are shown for each plant species with 10 or more root samples. The number of root samples (left) and the number of the plant–fungal associations observed in the root samples (right) are shown in parentheses: the latter was used in the calculation of the proportions of associated fungi.