Table 3 Study site woody cover statistics from field data in 2013 and 2014
Study site | Mean woody cover (%) per hectare | ||
|---|---|---|---|
Overall | By topographic position | ||
(a) Mean woody cover and variance (s 2) | |||
Stevenson-Hamilton (southern granites) | 25.8 (s 2 = 287.7) | Crest | 20.5 |
Mid-slope | 17.8 | ||
Valley | 39.2 | ||
Ngwenyeni (northern granites) | 34.2 (s 2 = 191.7) | Crest | 26.7 |
Mid-slope | 28.4 | ||
Valley | 47.5 | ||
Nhlowa (southern basalts) | 9.3 (s 2 = 53.4) | Crest | 11.0 |
Mid-slope | 2.1 | ||
Valley | 14.7 | ||
Mooiplaas (northern basalts) | 10.9 (s 2 = 49.3) | Crest | 9.7 |
Mid-slope | 8.7 | ||
Valley | 14.3 | ||
Stevenson-Hamilton | Ngwenyeni | Nhlowa | |
|---|---|---|---|
(b) Statistical significance of differences in site overall mean woody cover | |||
Ngwenyeni | t = 1.78, P = 0.379 (NS) | ||
Nhlowa | t = 2.54, P = 0.029* | t = 3.88, P = 0.006** | |
Mooiplaas | t = 2.37, P = 0.039* | t = 3.68, P = 0.008** | t = 0.21, P = 0.836 (NS) |