Table S1.

Variables included in multiple regression and Bayesian model selection to predict riverine fish catch

Predictor	Units	Dataset timeframe	Data source
Mean net radiation	W⋅m−2	2010	earthobservatory.nasa.gov/GlobalMaps/view.php?d1=CERES_NETFLUX_M
Mean annual temperature	°C	1961–1990	https://nelson.wisc.edu/sage/data-and-models/atlas/maps.php?datasetid=37&includerelatedlinks=1&dataset=37
Surface area	km2	NA	www.feow.org
Population	Persons⋅km−2	2010	sedac.ciesin.columbia.edu/gpw
Mean net primary production	kgC⋅m−2⋅y−1	NA	https://nelson.wisc.edu/sage/data-and-models/atlas/
Total species richness	Species per ecoregion	NA	www.feow.org

Data sources are indicated, and each variable was summarized at the scale of freshwater ecoregions (49) before analysis.