Fig. 7. Normalized area versus velocity for all Chondrus. The line is a_U, the exponential decay function describing the normalized area from 0.2 to 2.0 m s^–1 (Eqn 4). Model parameters (±95% confidence intervals) are: a=0.44±0.02, a_R=0.75±0.03, ß_a=0.70±0.08 m s^–1; R²=0.98. U_crit,a (2.47 m s^–1) is noted by the arrow.