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).