The Shannon index exhibited a highly significant positive correlation with soil OM and a significant positive correlation with WC.
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Soil organic matter and water content affect the community characteristics of arbuscular mycorrhizal fungi in Helan mountain, an arid desert grassland area in China.
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WC and TP displayed an increasing trend with altitude, reaching their highest values in the high-altitude area (13.07% and 161.84 mg/kg, respectively).