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. 2021 Jan 18;15(6):1735–1750. doi: 10.1038/s41396-020-00883-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Amount of daphnia- and leaf-derived carbon of a bacterial PLFA 16:1ω9 and b eukaryotic PLFA 18:2ω6,9 based on the PLFA-specific ¹³C isotopic analysis. A two-source isotope-mixing model was applied to estimate for single PLFAs the proportion of carbon derived from either daphnia or leaves. Isotopic values could not be measured for every sample due to the low concentrations of PLFAs. Thus, grey bars indicate samples for which we have no ¹³C values. D:L: daphnia and leaves in a given ratio with a complex microbial community; b-DL1:1: daphnia and leaves (ratio 1:1) with a bacterial community only.