Table 1 Comparison of pH values measured in coral calcifying fluid by microelectrodes and other methods.
From: Microelectrode characterization of coral daytime interior pH and carbonate chemistry
Technique | Reported by | Coral species | Light condition | Location | pHT | pHNBS | Notes |
|---|---|---|---|---|---|---|---|
Microelectrode | Al-Horani et al.23 | Galaxea fascicularis (tropical coral) | Light | Apexes | 9.28 | Sensor buried under tissue | |
Microelectrode | Ries5 | Astrangia poculata (temperate coral) | Light | Apexes, between septal ridges | 10.1 | Through a predrilled incision | |
Microelectrode | This work | Orbicella faveolata (tropical coral) | Light | Apexes, under polyp mouth | 8.75–9.65 | Sensor penetrated via the mouth | |
Microelectrode | This work | Turbinaria reniformis (tropical coral) | Light | Apexes, under polyp mouth | 8.8–9.3 | Sensor penetrated via the mouth | |
Microelectrode | This work | Acropora millepora (tropical coral) | Light | Apexes, under polyp mouth | 8.65 | Sensor penetrated via the mouth | |
pH sensitive dye | Venn et al.13 | Stylophora pistillata (tropical coral; microcolonies) | Light | Distal margin (edge) | 8.55–8.85 | 8.70–9.00 | Laterally grown on slide |
B-isotopes | Allison et al.12 | Porites spp.(tropical coral) | Light/dark cycle | Average | ∼8.5 | ∼8.65 | See citations therein |
