State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing, 210008, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
New Phytol. 2017 Jul;215(2):756-765. doi: 10.1111/nph.14606. Epub 2017 May 22.
Previous studies have revealed inconsistent correlations between fungal diversity and plant diversity from local to global scales, and there is a lack of information about the diversity-diversity and productivity-diversity relationships for fungi in alpine regions. Here we investigated the internal relationships between soil fungal diversity, plant diversity and productivity across 60 grassland sites on the Tibetan Plateau, using Illumina sequencing of the internal transcribed spacer 2 (ITS2) region for fungal identification. Fungal alpha and beta diversities were best explained by plant alpha and beta diversities, respectively, when accounting for environmental drivers and geographic distance. The best ordinary least squares (OLS) multiple regression models, partial least squares regression (PLSR) and variation partitioning analysis (VPA) indicated that plant richness was positively correlated with fungal richness. However, no correlation between plant richness and fungal richness was evident for fungal functional guilds when analyzed individually. Plant productivity showed a weaker relationship to fungal diversity which was intercorrelated with other factors such as plant diversity, and was thus excluded as a main driver. Our study points to a predominant effect of plant diversity, along with other factors such as carbon : nitrogen (C : N) ratio, soil phosphorus and dissolved organic carbon, on soil fungal richness.
先前的研究表明,在局部到全球尺度上,真菌多样性与植物多样性之间的相关性不一致,而且对于高山地区真菌的多样性-多样性和生产力-多样性关系的信息也很缺乏。在这里,我们利用真菌内转录间隔区 2(ITS2)区域的 Illumina 测序,对青藏高原 60 个草原地点的土壤真菌多样性、植物多样性和生产力进行了调查,以研究它们之间的内在关系。在考虑环境驱动因素和地理距离的情况下,真菌的α多样性和β多样性分别最好地解释了植物的α多样性和β多样性。最佳的普通最小二乘法(OLS)多元回归模型、偏最小二乘回归(PLSR)和变异分解分析(VPA)表明,植物丰富度与真菌丰富度呈正相关。然而,当对真菌功能群进行单独分析时,植物丰富度与真菌丰富度之间没有相关性。植物生产力与真菌多样性的关系较弱,真菌多样性与其他因素(如植物多样性、碳氮比、土壤磷和溶解有机碳)相互关联,因此被排除为主要驱动因素。我们的研究表明,植物多样性以及其他因素(如碳氮比、土壤磷和溶解有机碳)对土壤真菌丰富度具有主要影响。