Figure 1.

Taxonomic composition, (A) phylum level, and (B) class level of the fungal communities recovered from leaf interiors of three species along the nitrogen enrichment gradients in the study site. Bars show relative abundance of different taxonomic groups. The fungal endophyte classes with relative abundances of <0.1% were assigned to “Other”. A, Anemone rivularis; E, Elymus nutans; T, Thermopsis lanceolata. 0 (control), 5, 10, and 15 referring to 0, 5, 10, and 15 g N (NH₄NO₃) m⁻² yr⁻¹ treatments, respectively.