All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Datasets and code for analyses and generation of figures are available via FigShare (doi: 10.6084/m9.figshare.22266046) and a public GitHub repository (https://github.com/rumschsl/MacroBiodivTrends). This dataset is associated with the following publication: Rumschlag, S., M. Mahon, D. Jones, W. Battaglin, J. Behrens, E. Bernhardt, P. Bradley, E. Brown, F. De Laender, R. Hill, S. Kunz, S. Lee, E. Rosi, R. Schafer, T. Schmidt, M. Simonin, K. Smalling, K. Voss, and J. Rohr. Density declines, richness increases, and composition shifts in stream macroinvertebrates. Science Advances. American Association for the Advancement of Science (AAAS), Washington, DC, USA, 9(18): eadf4896, (2023).