Table 2.
Mean seagrass total sulfur (% d.w.) and sulfur isotope composition (δ34S) values in leaves, roots and rhizomes across Cockburn/Warnbro Sound, plus comparison to similar data from other locations. Means are calculated from 3 replicates, with standard errors provided in brackets. *Root biomass was too low at WS 3 m for root S and δ34S in one replicate.
| Site | Leaf S (%) | Rhizome S (%) | Root S (%) | δ34S Leaf (‰) | δ34S Rhizome (‰) | δ34S Root (‰) |
|---|---|---|---|---|---|---|
| GI 2 m | 0.18 (0.009) | 0.49 (0.04) | 0.76 (0.07) | 13.04 (0.7) | 2.26 (1.6) | −4.36 (0.9) |
| GI 3 m | 0.18 (0.01) | 0.61 (0.02) | 0.53 (0.05) | 14.42 (0.6) | 1.58 (0.5) | −0.54 (2.5) |
| GI 5 m | 0.21 (0.04) | 0.53 (0.01) | 0.61 (0.05) | 15.80 (1.0) | 1.72 (0.8) | −3.43 (1.1) |
| GI 7 m | 0.20 (0.02) | 0.54 (0.04) | 0.54 (0.03) | 16.47 (0.4) | 1.85 (0.3) | 3.08 (1.4) |
| EB 2 m | 0.20 (0.009) | 0.52 (0.04) | 0.65 (0.1) | 14.81 (0.2) | 1.95 (3.0) | 0.33 (4.4) |
| EB 7 m | 0.17 (0.01) | 0.50 (0.01) | 0.55 (0.04) | 14.52 (1.0) | 8.29 (1.7) | 0.36 (1.4) |
| EB 5 m | 0.21 (0.01) | 0.45 (0.02) | 0.68 (0.03) | 17.36 (0.1) | 3.56 (0.7) | 1.28 (0.6) |
| EB 3 m | 0.22 (0.03) | 0.31 (0.02) | 0.40 (0.02) | 17.25 (0.8) | 14.18 (2.3) | 9.25 (1.6) |
| WS 2 m | 0.17 (0.003) | 0.78 (0.08) | 0.68 (0.07) | 10.13 (0.8) | −5.22 (0.4) | −8.85 (3.6) |
| WS 3 m | 0.20 (0.02) | 0.56 (0.04) | 1.12* | 4.46 (1.0) | −4.51 (0.9) | −13.47* |
| WS 5 m | 0.17 (0.02) | 0.49 (0.05) | 0.45 (0.01) | 13.51 (0.2) | 4.76 (1.7) | 3.30 (0.9) |
| WS 7 m | 0.20 (0.009) | 0.66 (0.1) | 0.81 (0.2) | 11.58 (0.2) | −2.46 (2.8) | −5.74 (1.6) |
| SW Aus.1 | 0.88 | 0.73 | 0.95 | 18.3 | 4.6 | 0.9 |
| Shark Bay2 | 0.85 | 0.99 | 0.78 | 12.47 | −3.17 | 1.62 |
| Global ave.3 | 0.60 | 0.60 | 0.8 | 12.40 | 5.10 | 0.10 |
1Holmer and Kendrick 2013; 2Cambridge et al. 2012; 3Holmer and Hasler-Sheetal 2014.