Original caption: "Figure 2. Natural δ<sup>15</sup>N for the components of the investigated food-web.
Included are non-carnivorous plants (“non-CPs”, n = 7), <i>N. bicalcarata</i> plants (highlighted in grey; climbers without ants, n = 15; climbers with ants, n = 17; rosettes without ants, n = 15; rosettes with ants, n = 11), prey insects (n = 6), pitcher detritus (n = 10; one outlier with δ<sup>15</sup>N = 11.42 ‰ not shown), ‘other’ dipteran larvae (n = 10), ‘predatory’ dipteran larvae (n = 5) and <i>C. schmitzi</i> ants (n = 5). The dotted horizontal line highlights the level of prey insects. Boxplot shows medians, interquartile ranges, and the largest and smallest values that are not outliers (outliers shown as circles)."
Scharmann <i>et al.</i>
CC BY 2.5
Scharmann, M., D.G. Thornham, T.U. Grafe &amp; W. Federle (2013). A novel type of nutritional ant–plant interaction: ant partners of carnivorous pitcher plants prevent nutrient export by dipteran pitcher infauna. <i>PLoS ONE</i> <b>8</b>(5): e63556. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371%2Fjournal.pone.0063556">10.1371/journal.pone.0063556</a>