(A) Map of 39 reef locations surveyed, arranged in groups in the North (blue), West (red), East (green), and South (yellow). Ten reefs that are outlined in purple are at fore reef locations. (B) …
Colony by colony bleaching response to experimental warming.
Symbiont cell proportions are highly correlated with visual bleaching score, though there is high variance particularly among colonies with low bleaching scores. Note: Measurements are of all …
Symbiont density as measured by flow cytometry and visual bleaching score.
Accompanying source data are available as Figure 1—figure supplement 2—source data 1.data.
Colony by colony symbiont load pre- and post-experimental bleaching.
(A) Location of corals in the top 25% of values for symbiont retention. See Figure 1A for reef locations. Numbers above each reef label are the number of colonies sampled from that reef. (B) …
Reef locations, number of extreme temperature events and proportion of bleaching resistant individuals.
The fourth location is 0.4° latitude east of the northern squares. The adjacent barplot depicts the percentage of days spent above mean monthly maximum for all four locations outlined on the map. …
Regional temperature profiles using remote sensing data.
Average proportion of symbionts in control treatment nubbins at the end of the experiment across the 38 reefs in this study. Accompanying source data are available in Supplementary file 1.
Colors represent the same areas as in Figure 2. Accompanying source data are available as Figure 2—figure supplement 1, Figure 2—figure supplement 3—source data 1data.
Mean symbiont load for colonies inhabiting each reef.
Accompanying source data are available as Figure 2—figure supplement 4—source data 1data.
Mean number of extreme temperature events recorded at each reef (thressholds 31-35°C).
(A) Mean starting symbiont density of A. hyacinthus colonies across Palau is negatively correlated with the fraction of symbionts retained after heat stress. Colonies with lower symbiont population …
Colony by colony measurements of symbiont load, retention and growth.
Animation depicting the approximate locations of bleaching-resistant colonies sampled for this study across the Palauan archipelago.
Control | Heated | Heated | Temperature | |||
---|---|---|---|---|---|---|
Rank | Symbiont proportion | Symbiont proportion | Retention | Avg depth | No. intervals above 31°C | No. intervals above 32°C |
Top 25% | 0.080 | 0.082 | 1.041 | 0.954 | 1703 | 114 |
Bottom 25% | 0.113 | 0.023 | 0.22 | 1.062 | 1714 | 79 |
Symbiont load and retention for all colonies.
Physical properties of reefs and average heat retention statistics.
Temperature extremes by geographic region.
Average percent time spent per reef above 31–35°C (out of 35,764 observations) in the five geographic regions in this study. Values per individual reef can be found in Supplementary file 1.
Complete_Colony_By_Colony.data.csv.