Table 9. Nutrient (phosphorus, P, and nitrogen, N) and organic carbon accumulation rates (mean ± s.d.) calculated within forested and emergent marsh wetlands sampled in the Southern Coastal Plains ecoregion.
Values within a row followed by the same letter do not differ from one another at P = 0.05
| Nutrient | Reference sites (n = 12) | Agricultural sites (n = 4) | Urban sites (n = 5) |
|---|---|---|---|
| P (g m−2year−1) | 0.04 ± 0.04a | 0.26 ± 0.22a | 0.05 ± 0.02a |
| N (g m−2year−1) | 3.2 ± 3.8A | 7.2 ± 2.6A | 8.2 ± 5.1A |
| Organic C (g m−2year−1) | 50.0 ± 54.5A | 116.7 ± 43.9A | 109.5 ± 59.6A |
A
A significant group mean difference was found, but the source of the difference could not be discemed