Figure 2.

Network development and predicted currents in P. velutina. (a–c) Network development in P. velutina after 19 days, 25 days and 32 days. The image intensity of cords was used to estimate their thickness, enabling the production of the weighted, digitized networks (d–f). These are colour-coded to show the estimated thicknesses of all sections of all edges. Images (g–i) are colour-coded according to the total volume that has passed through each cord, as calculated by using the time-lapse model (scale bars, 50 mm).