[Altitudinal Distribution Pattern of Soil Bacterial Communities in Different Soil Layers and Driving Factors in the Forests of Mountain Zhela， Xizang].
摘要
-N， and TK were the main driving factors affecting the alpha diversity of soil bacterial communities by altitudinal distribution pattern. The sensitivity of soil bacteria to soil physicochemical factors was higher in the 0-20 cm soil layer than in the 20-40 cm soil layer. ④Neutral community model （NCM） analysis revealed that the assembly mechanism of soil bacterial communities in the two soil layers was mainly driven by deterministic processes. The results showed that there was variability in the structure and diversity of soil bacterial communities under different altitudinal gradients and soil horizons in the Zhela Mountains and that soil nitrogen， TK， EC， pH， and Temp play important roles in shaping the mechanism of bacterial community assembly and are important drivers of their distribution along the altitudinal gradient. The results of this study provide an important basis for understanding the pattern of soil bacterial community structure and diversity along the altitudinal distribution in different soil layers.