Additional information for 2 datasets (AllWebCRs.csv, and connectance_empirical_log_data.csv) Here we further explain the columns in each datasets, and the reference for the datasets. 1. AllWebCRs.csv Column1: Community name Column2: General habitat name Column3: Habitat description Column4: Consumer identity Column5: Resource identity Column6: Trophic interaction dimensionality (D), Unitless Column7: Consumer mass (Cmass), Unit: kg Column8: Resource mass (Rmass), Unit kg Column9: Log10(Consumer mass) (Log10Cmass), Unit: log10(kg) Column10: Log10(Resource mass) (Log10Rmass), Unit: log10(kg) Column11: Log10(Resource mass/Consumer mass) (Log10CRBR), Unitless Column12: Source/reference for each trophic interaction. Reference: Samraat Pawar, Anthony I Dell, and Van M Savage. \Dimensionality of consumer search space drives trophic interaction strengths". In: Nature 486.7404 (2012), p. 485. Samraat Pawar et al. \Interaction dimensionality scales up to generate bimodal consumer-resource size-ratio distributions in ecological communities". In: Frontiers in Ecology and Evolution 7 (2019), p. 202. 2. connectance_empirical_log_data.csv Column1: log(food web size) Column2: log(connectance) For the definition of the food web size and connectance, please see Supplementary Material. Reference: JE Cohen. "Ecologists' co-operative web bank". In: The Rockefeller University, New York (1989)