Statistical evaluation of the impact of temperature and CO2 on leaf size and shape in Acer rubrum.

Note.– Variables are grouped by relatedness to tooth abundance, leaf dissection, or leaf and tooth size. Values in parentheses are the standard error of the mean. P-values are based on t-tests with a Dunn-Šidák correction to account for multiple comparisons; for pairwise comparisons that failed Levene’s test for equality of variances, t-tests assuming non-homogeneous variance were used (denoted by †). Internal perimeter is the leaf perimeter after the removal of teeth; perimeter ratio is the leaf perimeter divided by the internal perimeter; circularity is 4×π×(leaf area)/(leaf perimeter)2; compactness is (leaf perimeter)2/(leaf area). Variables without stated units are unitless.