Effect of low air pressure on aboveground C content.

Effects of elevation on C content in aboveground biomass of <i>Trifolium pratense</i> (<i>n</i> = 20), <i>Hieracium pilosella</i> (<i>n</i> = 20), and <i>Brachypodium rupestre</i> (<i>n</i> = 20). The blue, yellow, and purple boxplot indicate the three air pressures tested in the chambers (85, 75, and 62 kPa). Lowercase letters indicate significant differences according to the post hoc test comparison (p < 0.05). Dots out of the whisker interval represent outliers. (DOCX)