Table 4. Sediment characteristics of Australian seagrass habitats and Posidonia oceanica.
| Species | Climate | Habitat | N | % OM | s.d. | % C (bulk) | s.d. | mg C cm−3 | s.d. | g C m−2 | s.d. |
| Posidonia australis | all | 47 | 6.43 | 3.88 | 1.31 | 1.06 | 11.42 | 9.55 | 2741.10 | 2292.35 | |
| temperate | subtidal | 18 | 5.88 | 2.82 | 2.14 | 1.19 | 20.14 | 10.94 | 4832.88 | 2040.08 | |
| subtropical | all | 29 | 6.78 | 4.43 | 0.79 | 0.50 | 6.01 | 1.98 | 1442.75 | 474.36 | |
| intertidal | 14 | 4.31 | 1.81 | 0.55 | 0.19 | 4.92 | 0.89 | 1179.76 | 214.20 | ||
| subtidal | 15 | 9.09 | 4.94 | 1.01 | 0.60 | 7.03 | 2.18 | 1688.21 | 523.18 | ||
| Halophila ovalis | tropical | subtidal | 15 | 6.21 | 3.45 | 1.18 | 0.38 | 8.64 | 2.86 | 2072.77 | 685.41 |
| Zostera muelleri | tropical | subtidal | 15 | 4.48 | 1.30 | 1.33 | 0.83 | 8.06 | 3.38 | 1933.85 | 810.48 |
| Cymodocea serrulata | tropical | subtidal | 15 | 3.02 | 0.88 | 0.68 | 0.19 | 6.32 | 1.74 | 1516.70 | 417.02 |
| Halodule uninervis | tropical | all | 27 | 5.87 | 2.51 | 0.69 | 0.36 | 5.19 | 2.55 | 1244.96 | 610.93 |
| intertidal | 13 | 4.66 | 2.05 | 0.62 | 0.48 | 5.50 | 3.36 | 1319.62 | 805.92 | ||
| subtidal | 14 | 7.00 | 2.42 | 0.75 | 0.21 | 4.90 | 1.54 | 1175.63 | 369.02 | ||
| Amphibolis antarctica | all | 59 | 2.43 | 2.41 | 0.36 | 0.32 | 3.33 | 2.26 | 799.34 | 543.57 | |
| subtropical | intertidal | 15 | 2.47 | 1.15 | 0.25 | 0.10 | 2.80 | 1.20 | 672.28 | 288.77 | |
| subtidal | 15 | 4.16 | 3.56 | 0.54 | 0.28 | 4.84 | 1.60 | 1162.70 | 384.96 | ||
| all | 30 | 3.32 | 2.74 | 0.39 | 0.26 | 3.82 | 1.74 | 917.49 | 417.14 | ||
| temperate | subtidal 5m | 15 | 0.79 | 0.73 | 0.13 | 0.05 | 1.54 | 0.45 | 369.01 | 108.49 | |
| subtidal 10m | 14 | 2.29 | 1.90 | 0.55 | 0.45 | 4.20 | 3.29 | 1007.23 | 790.54 | ||
| all | 29 | 1.51 | 1.59 | 0.33 | 0.38 | 2.82 | 2.64 | 677.12 | 633.55 | ||
| C. rotundata/ S. isoetifolium | tropical | subtidal | 15 | 3.08 | 0.39 | 0.32 | 0.11 | 2.67 | 0.85 | 640.15 | 204.87 |
| Posidonia sinuosa | temperate | all | 43 | 1.72 | 1.70 | 0.28 | 0.31 | 2.44 | 2.01 | 585.35 | 482.62 |
| subtidal 5m | 15 | 0.67 | 0.24 | 0.10 | 0.04 | 1.09 | 0.32 | 261.93 | 75.81 | ||
| subtidal 10m | 28 | 2.26 | 1.87 | 0.39 | 0.35 | 3.16 | 2.17 | 758.61 | 519.71 | ||
| C. rotundata/H. uninervis | tropical | all | 28 | 2.55 | 2.89 | 0.28 | 0.10 | 2.43 | 0.85 | 582.33 | 203.38 |
| intertidal | 13 | 3.74 | 3.80 | 0.28 | 0.10 | 2.28 | 0.73 | 546.42 | 174.33 | ||
| subtidal | 15 | 1.51 | 1.12 | 0.28 | 0.10 | 2.56 | 0.95 | 613.45 | 226.91 | ||
| T. hemprichii/C. rotundata | tropical | intertidal | 15 | 2.94 | 2.36 | 0.30 | 0.10 | 2.38 | 0.85 | 571.82 | 204.72 |
| All Species (Australia) | 280 | 3.74 | 3.13 | 0.64 | 0.68 | 5.26 | 5.46 | 1262.05 | 1483.37 | ||
| Posidonia oceanica | 7 | 42.99 | 12.09 | 17.85 | 6.08 | 20.16 | 9.49 | 4837.42 | 2276.62 | ||
| P. oceanica/Australian Spp | 11× | 28× | 4× | 4× |
Data are means for the top 25 cm of sediment. s.d. = standard deviation. %C is for the bulk sample. Bold indicates mean of all habitats for a species; italics relates to individual habitats for a given species.