Figure 3
From: A simple and effective approach to quantitatively characterize structural complexity

The structural units and buffer in Plot C4 as an example: shadow are the buffer, 5 m from each edge. Solid circles denote live trees, and their sizes are proportional to the DBH. X and Y are two perpendicular coordinate axes of the plot. All DBH is enlarged 2.5 times for viewing purposes47. This figure was generated by R (version 3.5.1, R Development Core Team 2020).