These comparisons use the same data set analyzed with two approaches, however, it may appear that the number of values for each method is different because some points near the BTC peak have been obscured from view. While the Vf-tot-dyn data trend along the same trajectory for rising and falling limbs (i.e., lack of hysteresis), the Vf-tot-dyn-TT values are different for comparable NO3-N concentrations between the two limbs of the BTC and show stronger uptake on the rising limb (Fig. 6A). Similar results are demonstrated for the Utot-dyn and Utot-dyn-TT values plotted against total nutrient concentration (Fig. 6B). Specifically, while the Utot-dyn values do not indicate any hysteretic behavior, the Utot-dyn-TT values are different at comparable concentrations (Fig. 6B). However, the hysteretic behavior displayed in the travel time approach values is not present in the Sw-add-dyn data (Fig. 4A,B) (a metric that is time independent) or the N:Cl data from which the Sw-add-dyn values are directly calculated.