Fig. 4
From: Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam
Boxplots of the five calculated ratios relating species richness of the regeneration and the overstory layers. The Y-axis indicates the ratio values, the bold line in the boxplots is the mean, black dots are outlier values, and the upper and lower lines in the boxplot depict the third and first quartiles at the 75th and 25th percentile. The red line marks the value 1, indicating similarity between both forest layers (SRRÂ Species richness ratio, TDR True diversity ratio, SSR Same species ratio, NSR Newly occurred species ratio, TSR Threatened species ratio)