LAUSR

In this investigation of saxicolous lichen communities in the Bogda Mountains using 20 quadrats (20m × 20m), the data were classified based on species coverage using two⁃way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA). Community structure characteristics, species diversity, and similarity index were analyzed. The relationship between species distribution of saxicolous lichens and six different environmental factors was examined by canonical correspondence analysis (CCA). The results showed that the saxicolous lichen community can be divided into five associations according to the TWINSPAN analysis and DCA ordination: Association 1 ( Lecidea tessellata Florke+Peltula euploca ( Ach.) Poelt +Xanthoparmelia durietzii Hale), including 25 species with the total coverage of 30. 145% and diversity of 4.025; Association 2 (Hypogymnia physodes (L.) Nyl. +Aspicilia sublaqueata (H.Magn.) J.C. Wei+Collema subconveniens Nyl.), including 17 species with the total coverage of 15. 885% and diversity of 3. 196; Association 3