Composition of the plant–fungal associations observed at the study site.

<p>The fungal-OTU composition (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0078248#pone.0078248.s002" target="_blank">Figure S2</a>) was weighted by the number of root samples from which a fungal OTU was observed at each of the phylum (a), order (b) and genus (c) levels. In total, 1,915, 765 and 1,150 plant–fungal associations were observed for all the 36 plant species (left), <i>Quercus</i> species (middle) and subordinate plant species (right), respectively. OTUs whose taxonomy is unsettled at the phylum or order level are indicated by asterisk.