Summary of results from physiological parameters measured in Acropora aspera taken from three colonies on Heron Island reef crest
| Parameter . | Heated 2 weeks prior . | Heated 1 week prior . | Not pre-heated . |
|---|---|---|---|
| Effective yield of PS II (Fv/Fm) | ↓ | ↓ | ↓↓ |
| NPQ | ↑↑ | ↑ | ↑ |
| Symbiodinium density | – | – | ↓ |
| Xanthophyll pool (Dt+Dd) | ↑ | – | ↑ |
| Xanthophyll pool/Chl a | ↑ | – | ↓ |
| Xanthophyll cycling Dt/(Dt+Dd) | ↑ | – | ↑ |
| Parameter . | Heated 2 weeks prior . | Heated 1 week prior . | Not pre-heated . |
|---|---|---|---|
| Effective yield of PS II (Fv/Fm) | ↓ | ↓ | ↓↓ |
| NPQ | ↑↑ | ↑ | ↑ |
| Symbiodinium density | – | – | ↓ |
| Xanthophyll pool (Dt+Dd) | ↑ | – | ↑ |
| Xanthophyll pool/Chl a | ↑ | – | ↓ |
| Xanthophyll cycling Dt/(Dt+Dd) | ↑ | – | ↑ |
Corals were heat stressed for either 2 weeks, 1 week or not pre-stressed prior to the main experimental period, averaging 34°C. Effective PSII yield, NPQ, Symbiodinium densities and xanthophyll ratios are displayed in greater detail in the figures. Arrows indicate significant difference (↑, increased; ↓, decreased) from control on the final day of the simulated bleaching event. Double arrows indicate significant difference between treatments
Dt, diatoxanthin; Dd, diadinoxanthin