The given dataset was compiled for n=2668 communities (242 study IDs in total, see the metadata file) across terrestrial and freshwater realms (terrestrial birds: n=1259, invertebrates: n=124, plants: n=435, and mammals: n=136, freshwater fish: n=587, invertebrates: n=112, and phytoplankton: n=15). Community timeseries include species-level abundance (or biomass in 15% of cases) and a minimum of 20 years sampled. We have compiled this data and used it for the first time to analyze how community stability and its drivers (species richness, overall synchrony, and tail-dependent synchrony) would differ across realms.

The authors thank David Vasseur for getting the requested data from a published article with no open data. We thank the ETH Board for funding through the Blue-Green Biodiversity (BGB) Initiative 2020, the Seehausen/Eawag lab and European Research Council under the European Union's Horizon 2020 research and innovation program (grant agreement No 787638) granted to Catherine H. Graham. We would like to thank the large number of scientists and volunteers that contributed to long-term data collection, and the data providers who chose to openly publish and share their datasets for continued analysis.