Figure 4: Comparisons of light penetration (%) between June and July (A), June and August (B), and July and August (C). Boxplots show absolute differences in light penetration within each plot between month pairings. Line plots show change in mean light penetration for each plot between month pairings. Mean light penetration at the plot level was significantly different between months (repeated measures ANOVA, F2,96=9.2, P < 0.001). Mean light penetration in June was significantly higher than in July (Bonferroni, P adj < 0.001) and August (Bonferroni, P adj = 0.036). July and August did not significantly differ (Bonferroni, P adj = 0.4). Between June and July, 37 plots decreased in light penetration while 12 plots increased. Between June and August, 31 plots decreased in light penetration, while 18 plots increased. Between July and August, 22 plots decreased in light penetration while 27 plots increased. Boxes represent the 25th to 75th percentiles of the data, and whiskers represent the 10th and 90th percentiles. Lines coloured in black represent plots that decreased in light penetration from the first to the second month, and lines coloured in goldenrod represent plots that increased in light penetration from the first to the second month. Month pairings marked by an asterisk (*) significantly differed in mean light penetration.