Cheng Fei, Li Mingman, Ren Yihua, Hou Lei, Gao Tan, He Peng, Deng Xiangsheng, Lu Jie
Institute of Tibet Plateau Ecology, Tibet Agricultural & Animal Husbandry University, Nyingchi 860000, China.
Key Laboratory of Forest Ecology in Tibet Plateau, Tibet Agricultural & Animal Husbandry University, Nyingchi 860000, China.
J Fungi (Basel). 2023 May 21;9(5):596. doi: 10.3390/jof9050596.
Soil fungal community characteristics of alpine timberlines are unclear. In this study, soil fungal communities in five vegetation zones across timberlines on the south and north slopes of Sejila Mountain in Tibet, China were investigated. The results show that the alpha diversity of soil fungi was not different between the north- and south-facing timberlines or among the five vegetation zones. (Ascomycota) was a dominant genus at the south-facing timberline, whereas the ectomycorrhizal genus (Basidiomycota) decreased with decreasing coverage and density at the north-facing timberline. Saprotrophic soil fungi were dominant, but their relative abundance changed little among the vegetation zones at the south timberline, whereas ectomycorrhizal fungi decreased with tree hosts at the north timberline. Soil fungal community characteristics were related to coverage and density, soil pH and ammonium nitrogen at the north timberline, whereas they had no associations with the vegetation and soil factors at the south timberline. In conclusion, timberline and presence exerted apparent influences on the soil fungal community structure and function in this study. The findings may enhance our understanding of the distribution of soil fungal communities at the timberlines of Sejila Mountain.
高山林线土壤真菌群落特征尚不清楚。在本研究中，对中国西藏色季拉山南坡和北坡林线以上五个植被带的土壤真菌群落进行了调查。结果表明，土壤真菌的α多样性在南北向林线之间或五个植被带之间没有差异。在南坡林线处，子囊菌门是优势属，而在北坡林线处，外生菌根属（担子菌门）随着覆盖率和密度的降低而减少。腐生土壤真菌占主导地位，但其相对丰度在南坡林线的植被带之间变化不大，而外生菌根真菌在北坡林线处随着树木寄主的减少而减少。土壤真菌群落特征与北坡林线的覆盖率和密度、土壤pH值和铵态氮有关，而与南坡林线的植被和土壤因子无关。总之，在本研究中，林线和树木的存在对土壤真菌群落结构和功能产生了明显影响。这些发现可能会增进我们对色季拉山林线土壤真菌群落分布的理解。
