The highest values for the SAR slope for the total composition were recorded for the dominant vegetation type (QuercuseLindera, Table 1), the lowest for the mountain forest (AcereRhododendron). Assuming the SAR slopes for the herb layer, the results were the opposite.
Solar radiation played a fundamental role in both the total and the herbaceous SARs. The regression trees indicate that mesic forests at low altitudes reached the highest SAR slope (Fig. 4). Furthermore, a comparison of the vegetation subsets revealed