Tree selection
We conducted a paired design to compare arthropod communities associated to male and female trees of B. cordata . We selected thirteen pairs of male and female individuals of B. cordata with similar traits: diameter at breast height (DBH), tree coverage (measured as a vertical projection of exposed leaf area), and the tree height. Because the environment in the reserve is highly heterogeneous, we chose pairs of trees with individuals that were within 10 m of each other, to control for any neighborhood effect and for any microclimate effect. We report and statistically compare the characteristics of the trees in Supplemental Materials II.