Net primary production (NPP) of macroalgal taxa other than Macrocystis pyrifera was calculated using methods described in Harrer et al.
(2013). The protocol document contains an excerpt from Harrer, et al (2013).
Harrer, S.L., D. C. Reed, S. J.
Holbrook, and R. J. Miller. 2013. Patterns and controls of the dynamics of net
primary production by understory macroalgal assemblages in giant kelp forests.
Journal of Phycology, 49: 248-257