Fig. 2.
Effects of intact seaweeds and extracts on coral health. (A and B) Visual coral tissue bleaching (percent 2D area; mean ± SEM) and (C–F) photosynthetic efficiency (Y; mean ± SEM) of the corals Porites porites in Panama and Porites cylindrica in Fiji when in contact with intact seaweeds for 20 d (A–D: n = 9–11), or in contact with gel strips containing lipid-soluble extracts from the same seaweeds for 24 h (E and F: n = 10). Analyzed by Kruskal-Wallis ANOVA on Ranks. Letters indicate homogeneous subgroups by posthoc Student-Newman-Kuels tests.