DescriptionNitrogen isotope abundance ratio of Nepenthes bicalcarata and associated food web components.png
English: Original caption: "Figure 2. Natural δ15N for the components of the investigated food-web.
Included are non-carnivorous plants (“non-CPs”, n = 7), N. bicalcarata 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 δ15N = 11.42 ‰ not shown), ‘other’ dipteran larvae (n = 10), ‘predatory’ dipteran larvae (n = 5) and C. schmitzi 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)."
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Scharmann, M., D.G. Thornham, T.U. Grafe & W. Federle (2013). A novel type of nutritional ant–plant interaction: ant partners of carnivorous pitcher plants prevent nutrient export by dipteran pitcher infauna. PLoS ONE8(5): e63556. doi:10.1371/journal.pone.0063556
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