Distribution of trunk epiphytic lichens in the coastal tropical evergreen monsoon elfin forest

In order to understand the distribution regularities of epiphytic lichens in tropical evergreen monsoon elfin forest, 20 plots (20m×20m) were randomly selected in the permanent sample plot established in TongGuLing nature reserve, Wenchang city. The relevant data of the epiphytic lichens on the trunk of the trees with the important value prioritized at the top 20 were collected. The relationship between lichen species and the DBH of the host species, their distribution height, orientation and related environmental factors were analyzed. The results indicated that the coverage of the lichens was positively correlated with the host’s relative density and frequency; the lichens mainly occur in the east south and southeast aspect of the trunk of the host species, which was consistent with slope aspect of the selected large plots; the diameter of 1.5-13.5 cm and the height of 0.6-1.4 m was the main distribution range for the lichens on the trunk of the host species, with 1.2-1.4 m the optimalrange; among the environmental factors, light intensity had the strongest effect on the distribution of epiphytic lichens.