Fig. 4
From: How do invasive trees impact shrub layer diversity and productivity in temperate forests?
The proportions of main species biomass in shrub layers among distinguished forest types. Boxplots indicate the first and third quartiles, the line inside each box indicates the median, and whiskers indicate the minimum and maximum without outstanding observations (> 1.5 interquartile range). Points represent particular observations. For clarity we drew only species occurring in at least 20 study plots and observations from plots with proportions > 5%, sorted by overall proportion. Invasive species studied were marked by red color