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. 2011 Oct 6;109(1):145–152. doi: 10.1093/aob/mcr253

Fig. 4.

Fig. 4.

Effect of 15N provisioning of ants on Aechmea mertensii vegetative and floral parts. Natural and experimental δ15N values for leaves (n = 18) and flowers (n = 9) on Camponotus femoratus-bromeliads and for leaves (n = 12) and flowers (n = 9) on Pachycondyla goeldii-bromeliads. Error bars indicate the 90th and 10th percentiles, the ends of the boxes indicate the 25th and 75th percentiles. Statistical analyses were conducted using the Mann–Whitney U-test: NS = no significant differences, *P < 0·05, **P < 0·005.