FIG 1.

Heat-stressed symbionts have decreased ability to colonize aposymbiotic hosts. (A) Representative images of symbiont densities from each inoculation. (B) Symbiont densities in Aiptasia 2 days after initial inoculation with respective heat-treated algae. (C) Photosynthetic efficiency was measured in heat-stressed algae. (D) Symbiont density was tracked over time over 21 days to determine algal proliferation rates. μ is a unitless slope of the linear regression of the log-transformed data. Letters indicate significant differences (P ≤ 0.05) as determined by Kruskal-Wallis and post hoc Dunn Tests. Stars indicate significant differences (P ≤ 0.05) as determined by ANOVA and post hoc Tukey test.