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Average δ15N values indicating natural nitrogen abundance in Paepalanthus bromelioides, Drosera hirtella, Drosera aff. villosa, Hyptis sp., Lychnophora sp., Barbacenia sp., spider and grasshopper faeces, and tissues of spiders and insects. Bars indicate standard errors, and different letters indicate significant differences (P < 0·05; ANOVA/Tamhane's T2 post-hoc test; α = 0·05).
