Fig. 2. Boxplots depicting the (A) daily soil-temperature difference in four groups (each n = 14) and (B) daily soil-moisture difference in four groups (each n = 7). Different letters (superscript a, b, and c) mean statistical differences (p < 0.05), as determined by a Kruskal-Wallis test with Bonferroni correction. The central horizontal lines within the boxes indicate the medians; box edges indicate the quartiles; whiskers indicate the minimum and maximum values; and the open circle indicates the outlier. Bare: bare soil; C.te: Cassiope tetragona; D.oc: Dryas octopetala; S.ac: Silene acaulis.
© J Ecol Environ
