Fig 2. Number of seeds as a function of the proportion of ant visitation and ant aggressiveness.

Number of seeds produced per branch of the EFN-bearing plant Turnera subulata (Turneraceae) visited in variable frequency by ants differing in its aggressiveness degree. The main ant species attending the EFN’s in each plant (> 60% of the total observed visitation) was classified into three groups according to its aggressiveness towards soil baits: low (squares and continuous line; Pheidole sp. and Dorymyrmex piramicus), intermediate (rhomb and dashed line; Camponotus blandus) and high aggressiveness (circle and dotted line; Ectatomma bruneum and Solenopsis sp.). Low aggressiveness: Intercept = 18.29, Estimate = 8.03. Intermediate aggressiveness: Intercept = 9.70, Estimate = 16.19. High aggressiveness: Intercept = 53.46, Estimate = -58.08).