Results of separate three-way nested analyses of variance testing for differences in A) net ecosystem production (<i>NEP</i>), B) gross primary production (<i>GPP</i>), C) ecosystem respiration (<i>Re</i>), D) the range between <i>GPP</i> and <i>Re</i>, and E) irradiance (<i>PAR</i>) among the two sample years, nine islands, and three habitat types (kelp forests, transition habitats, and urchin barrens).

For each analysis, year and habitat type were fixed factors, and island nested within year was a random factor. The model r2 is given for each analysis.