Fig. 1. Conceptual model of macroalgae reconfiguring in flow. Gray and black stick figures represent macroalgae at low and high velocity, respectively. Large gray arrows represent bending force applied by drag. Small black arrows represent the bending moment applied to the beam. (A) Blade-like species, for which force applied along the length of the blade causes deflection and reduction in frontal area. (B) Tree-like species, for which force applied to branches causes bending inward and compression of the branches, reducing the frontal area. Not all forces and moments are drawn.