Table 2 Comparison of within-reef carbonate chemistry at Lizard Island (northern), Davies Reef (central) and Heron Island (southern) of the Great Barrier Reef.

From: Variation in growth rates of branching corals along Australia’s Great Barrier Reef

Location T* °C S* AT * μmol kg−1 CT * μmol kg−1 pHseawater pCO2 μatm Ωarag CO3 2−
Lizard Island (mean) 28.5 ± 0.3 34.6 ± 0.3 2230 ± 24 1941 ± 26 7.99 ± 0.03 449 ± 46 3.3 ± 0.2 206 ± 14
range 27.7–29.4 34.0–35.2 2165–2263 1874–2001 7.86–8.06 369–644 2.6–3.7 369–644
Davies Reef (mean) 28.5 ± 0.2 35.0 ± 0.1 2276 ± 16 1954 ± 25 8.03 ± 0.03 404 ± 40 3.7 ± 0.2 228 ± 13 227
range 28.1–28.9 34.9–35.1 2213–2304 1878–2018 7.92–8.10 325–542 2.9–4.1 181–253
Heron Island (mean) 26.6 ± 0.1 35.4 ± 0.0 2258 ± 2 1969 ± 4 7.99 ± 0.00 449 ± 6 3.3 ± 0.0 205 ± 2
range 24.2–30.4 35.2–35.5 2176–2307 1834–2059 7.83–8.14 281–669 2.3–4.2 144–261
  1. Values for Davies Reef and Heron Island determined by Albright et al.33, 34, respectively. Averages and ranges of measured* and calculated physical and chemical parameters given. Carbonate chemistry for Lizard Island was determined in this study in January 2014 on the back reef inside the Lizard Island lagoon (Fig. S1). Carbonate chemistry was determined on the back reef flat at Davies Reef in the summer January 2012. In Heron Island, values are for the combined sampling on the reef flat and crest in March 2012. T = temperature, S = salinity, AT = Total alkalinity, CT = Carbon total, pCO2 = partial pressure of carbon dioxide, Ωarag = Aragonite saturation, CO3 2− = carbonate ion.