Table 2. Regression slopes and associated p-values (* p < 0.05, · p < 0.1, no symbol = not significant) of relationships between variation in forb and graminoid species composition explained by local abiotic and biotic environmental variables in redundancy analyses (RDA) of local grassland species composition along broad scale temperature and precipitation gradients in southern Norway.
| Temperature | Precipitation | |||
|---|---|---|---|---|
| Forbs | Graminoids | Forbs | Graminoids | |
| Abiotic variables | - 3.153* | - 1.852 | + 0.339 | + 0.596 |
| pH | - 0.067 | - 0.859 | + 0.323 | + 0.521* |
| LOI | + 0.072 | + 0.857 | + 0.078 | + 0.095 |
| Moisture | + 0.411 | - 0.898 | - 0.136 | + 0.347 |
| Biotic variables | + 0.254 | + 1.191 | + 0.215 | - 0.056 |
| Vegetation height | + 1.318 | + 1.227 | + 0.196 | + 0.109 |
| Litter cover | + 1.222· | + 0.978 | + 0.164 | - 0.107 |
| Bryophyte cover | + 1.040· | + 1.025 | + 0.099 | + 0.029 |
LOI refers to Loss-On-Ignition, a measure of soil organic matter. n = 11.