Fluctuating and directional asymmetry in species abundance.

*In order to compare the FA level among the groups, we used the non-parametric Kruskal-Wallis test.
**In order to test for directional asymmetry, we used one sample two tailed t-test of against zero, separately for each one of the different groups.
***We tested for normality of the signed asymmetry using the Shapiro-Wilk test.