Changes in freshwater food webs over time
Temporal trends in allochthony are best described by theunivariate ‘Temporal’ model (\(allochthony=0.06-0.01time\)) (Supplementary Table 2). While the model describes a decrease inallochthony over time (negative slope term on time ), this relationship is not statistically important (95% Bayesian credible interval of slope term overlaps with zero) (Supplementary Fig. 1, 2). Conversely, trends in TP are best described by ‘Size’ controlled ‘Location’ interaction model(\(TP=1.79+0.14size+0.27drainage-0.44time+0.17drainage*\text{time}\)). The interaction coefficient between catchment and time is statistically different from zero (95% credible interval: 0.08–0.21), suggesting that differences in TP over time was not consistent across catchments (Fig. 3, Supplementary Fig. 1).