Abstract: Soil fungal diversities were analyzed by PCRDGGE molecular fingerprint technique for a natural forest of Castanopsis fabri and an adjacent plantation of Cunninghamia lanceolata in Jian’ou Wanmulin Nature Reserve in Fujian Province, southeastern China. The two forests had abundant fungal species in the soil, and the diversity index, richness index and evenness index of soil fungal communities were 3.451-3.709, 19-25 and 0.986-0.989, respectively. Basidiomycota was the most dominant group, followed by Ascomycota, Zygomycota and Deuteromycota. Genera Cryptococcus, Pluteus, Coniochaeta, Trichoderma and Geastrum were found common in the two forest soils, and they were also the dominant fungal species of the two forest soils. Principal component analysis showed that both vegetation type and soil depth affected fungal community composition, and the former had a greater effect than the latter.

Key words: ecosystem service value, spatial and temporal change, middle reach of Yangtze River, terrain gradient effect