Department of Biology, Stanford University, Stanford, CA, USA.
Society for the Protection of Underground Networks, SPUN, Dover, DE, USA.
Nat Microbiol. 2023 Dec;8(12):2406-2419. doi: 10.1038/s41564-023-01514-8. Epub 2023 Nov 16.
Understanding drivers of terrestrial fungal communities over large scales is an important challenge for predicting the fate of ecosystems under climate change and providing critical ecological context for bioengineering plant-microbe interactions in model systems. We conducted an extensive molecular and microscopy field study across the contiguous United States measuring natural variation in the Populus fungal microbiome among tree species, plant niche compartments and key symbionts. Our results show clear biodiversity hotspots and regional endemism of Populus-associated fungal communities explained by a combination of climate, soil and geographic factors. Modelling climate change impacts showed a deterioration of Populus mycorrhizal associations and an increase in potentially pathogenic foliar endophyte diversity and prevalence. Geographic differences among these symbiont groups in their sensitivity to environmental change are likely to influence broader forest health and ecosystem function. This dataset provides an above- and belowground atlas of Populus fungal biodiversity at a continental scale.
了解陆地真菌群落在大尺度上的驱动因素，是预测气候变化下生态系统命运和为模型系统中植物-微生物相互作用提供关键生态背景的重要挑战。我们在美国各地进行了广泛的分子和显微镜实地研究，测量了树种、植物生态位区室和关键共生体之间的杨树真菌微生物组的自然变异。我们的研究结果表明，杨树相关真菌群落的生物多样性热点和区域特有性是由气候、土壤和地理因素共同决定的。对气候变化影响的建模表明，杨树菌根共生体的关联恶化，潜在致病性叶内内生真菌的多样性和流行度增加。这些共生体组之间对环境变化的敏感性的地理差异，可能会影响更广泛的森林健康和生态系统功能。该数据集提供了一个大陆尺度上的杨树真菌生物多样性的地上和地下图谱。
