highly significantp < 0.01
SOC content and stock As shown in Table 2 , the soil pH in the WLFZ exhibited a highly significant correlation with elevation ( p < 0.01).
SOC content and stock As shown in Table 2 , the soil pH in the WLFZ exhibited a highly significant correlation with elevation ( p < 0.01).
Furthermore, at most elevations of the WLFZ, the soil δ 13 C values showed an increasing trend with soil depth (Fig. 3 e).
Overall, the soil TN content showed a decreasing trend with increasing depth.