This Zenodo record contains the supporting data and code for the publication 'Generalization of a density-dependent ecosystem function in dominant aquatic macroinvertebrates', published in Oikos (https://doi.org/10.1111/oik.10774). The data are described in detail in the corresponding publication. The data archive contains a ReadMe file, two text files with the empirical data, and a corresponding R script for analysis. All required data to reproduce the full analysis from the original publication are provided. In order to reproduce the analysis and figures, run DensityDependenceAnalysis20240319.R. Make sure that your working directory is the actual folder containing the data files Data_Field.txt and Data_Lab.txt. If run in Rstudio, this should happen automatically. Else this is easily achieved by (re)starting R (or R Studio) by double-clicking the R script file from the folder. The script will produce all the figures from the paper, organized in a folder AnalysisYYYYMMDD and two subfolders CheckFigs and SuppFigs. Figures are prepared as pixel graphics (PNG).