Fig. 8. Plot of maximum reported xylem flux rates (liters of fluid transported vertically through a plant stem per day) for plants (Enquist and Niklas, 2001). The RMA regression line is fitted to the average of the logarithm for every 0.1 log unit interval of plant biomass, but both the average (circles) and raw data (bars) are shown in the plot. The slope is 0.736 (P<0.0001, N=31, 95%CI: 0.647, 0.825). The regression fitted to the entire unbinned data set gives a similar exponent of 0.735 (P<0.0001, N=69, 95% CI: 0.682, 0.788). Figure taken from Enquist and Niklas (2001) with permission.