Fig. 6 | Scientific Reports

Fig. 6

From: Effects of vertical forest stratification on precipitation material redistribution and ecosystem health of Pinus massoniana in the Three Gorges Reservoir area of China

Fig. 6

RDA plot indicating relationships between forest environment and soil characteristics. (In the diagram, the four-pointed stars represent sample groups under different environmental conditions. Hollow arrows denote environmental factors, while solid arrows signify forest tree and woodland characteristics. The angles between forest trees and woodlands, and environmental factors represent the positive or negative correlation between species and environmental factors (acute angle: positive correlation; obtuse angle: negative correlation; right angle: no correlation). The horizontal axis is the first axis (RDA1), and the vertical axis is the second axis (RDA2), which respectively represent the directions of the largest and second-largest variations in the data, closely related to the most primary and secondary environmental factors) (Fig. 7).

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