Mean (SE) total number of native1 and exotic2 seedlings (m-2) in the stock-pile at the Hixon study site over four sampling depths and five sampling dates, and in undisturbed soil at five sampling dates. 1Date: F4,25 = 18.90, p = 0.0001. Depth: F3,75 = 2.44, p = 0.0694. Interaction: F12,75 = 1.27, p = 0.2596. 2Date: F4,75 = 5.78, p = 0.0018. Depth: F3,75 = 2.61, p = 0.0581. Interaction: F12,75 = 1.66, p = 0.0629. 3Sampling date means for native species followed by the same lowercase letter are not significantly different (p > 0.10, protected LSD test). 4Sampling depth means for native species followed by the same lowercase letter are not significantly different (p > 0.10, protected LSD test). 5Sampling date means at a depth for exotic species followed by the same lowercase letter are not significantly different (p > 0.10, protected LSD test). 6Sampling depth means at a sampling date for exotic species followed by the same uppercase letter are not significantly different (p > 0.10, protected LSD test). 7Undisturbed date means for an origin of species followed by the same lowercase letter are not significantly different (p > 0.10, protected LSD test).
| Depth (cm) | Species origin | Sampling Date | Mean | |||||
|---|---|---|---|---|---|---|---|---|
| June 2013 | August 2013 | April 2014 | May 2014 | July 2014 | ||||
| 0–10 | Native | 0.98 (0.41) | 4.57 (1.43) | 0.25 (0.16) | 0.51 (0.25) | 0.51 (0.25) | 1.77a4 (0.55) | |
| Exotic | 0.00c5A6 (0.00) | 1.91aA (0.67) | 0.51bcA (0.32) | 1.14abA (0.38) | 0.00cA (0.00) | 0.71 (0.21) | ||
| 10–20 | Native | 0.38 (0.26) | 4.57 (1.79) | 0.00 (0.00) | 0.13 (0.13) | 0.76 (0.39) | 1.53a (0.62) | |
| Exotic | 0.13bA (0.13) | 1.79aA (0.78) | 0.76aA (0.28) | 0.76aAB (0.28) | 0.13bA (0.13) | 0.71 (0.20) | ||
| 20–30 | Native | 0.38 (0.17) | 3.05 (0.98) | 0.13 (0.13) | 0.00 (0.00) | 0.13 (0.13) | 0.97ab (0.38) | |
| Exotic | 0.13bA (0.13) | 1.14aA (0.26) | 0.25bA (0.16) | 0.38bB (0.26) | 0.25bA (0.16) | 0.43 (0.11) | ||
| 30–40 | Native | 0.64 (0.23) | 1.40 (0.0.36) | 0.00 (0.00) | 0.13 (0.13) | 0.13 (0.13) | 0.60b (0.17) | |
| Exotic | 0.51aA (0.38) | 0.25aA (0.16) | 0.38aA (0.38) | 0.13aB (0.13) | 0.13aA (0.13) | 0.28 (0.11) | ||
| Native Mean | 0.75b3 (0.18) | 4.46a (0.85) | 0.13c (0.07) | 0.25c (0.11) | 0.50bcA (0.17) | |||
| Exotic Mean | 0.19(0.11) | 1.27 (0.29) | 0.48 (0.14) | 0.60 (0.15) | 0.13 (0.06) | |||
| Undisturbed | Native | 0.25b7 (0.0.25) | 10.92a (1.36) | 0.00b (0.00) | 0.38b (0.26) | 0.13b (0.13) | 2.34 (0.84) | |
| Exotic | 0.13a (0.13) | 1.50a (1.38) | 0.25a (0.16) | 2.54a (0.92) | 0.51a (0.25) | 0.99 (0.36) | ||