Richness at three scales in patches dominated by Cephalanthus occidentalis (C), Schoenoplectus acutus (S), Typha × glauca (T), Phragmites australis (P) or reference areas (R). A 0.5 m2 quadrats B aggregated pond-level richness (12 quadrats) C Mao-Tau sampling-richness relationships, with the number of ponds each type was sampled in indicated in parentheses. Error bars indicate standard deviation at 37 quadrats. Patch type (monodominant species) was a significant predictor of pond-level richness as evaluated via a mixed-model ANOVA (F = 3.81, p = 0.035, model R2 = 0.58).