横断山北部高山区土壤真菌群落多样性研究

采用物种丰富度（S）、 Shannon-Wiener指数（H′）、Pielou指数（E）和优势度指数(D)等指标，对横断山北部高山区土壤真菌群落多样性进行了测定。结果表明，该区域土壤真菌的物种丰度、多样性指数、均匀度指数和优势度指数分别为6.7714±2.9415、1.6956±0.4110、0.9302±0.0719、0.2290±0.1052。折多山地区土壤真菌数量最多，物种丰富度（S）和Shannon-wiener指数（H′）最高，分别达8.5000和1.8702。利用极点排序，结合垂直带的气候类型，可将横断山北部高山区土壤真菌区系划分为3个垂直生态类群：山地寒温带及高山亚寒带气候类型（海拔2900~4400m）、高山寒带气候类型（海拔4400~4600m）和高山永冻带气候类型（海拔4600~4800m）。

Diversities of Soil Fungal Communities in the Northern Alp Region of Hengduan Mountains

Amount, categories and distribution of soil fungi in the northern alp region of Hengduan Mountains were investigated, and the abundance(S), Shannon-wiener’s diversity index(H’), Pielou’s evenness(E) and dominance index(D) were calculated for community diversity of soil fungi. The results showed that the abundance(S), Shannon-wiener’s diversity(H′), Pielou’s evenness(E) and dominance index(D) were 6.7714±2.9415, 1.6956±0.4110, 0.9302±0.0719 and 0.2290±0.1052, respectively. Fungi quantity in Zheduo Mountain was the most, and the abundance(S) and Shannon-wiener’s diversity(H′) were also the most. They were 8.5000 and 1.8702, respectively. By means of Bray-Curtis Measure, soil fungi were vertically distributed from lower altitude upwards into 3 belts, i.e., mountainous region cold temperate zone and high-mountains subfrigid zone(altitude 2900~4400m)，high-mountains frigid zone(altitude 4400~4600m), and high-mountains frozen zone(altitude 4600~4800m).