Appendix B (TABLE B1). Descriptive statistics for vegetation variables.
Variable |
Statistic |
1991 |
1994 |
1998 |
PEC |
N |
79 |
80 |
81 |
|
Range (%) |
0 – 100 |
0 – 100 |
0 – 100 |
|
Mean (SD) |
41.4 (30.2) |
50.4 (31.9) |
50.6 (34.1) |
NWC |
N |
91 |
92 |
93 |
|
Range (%) |
0 – 96 |
0 – 98 |
0 – 100 |
|
Mean (SD) |
37.4 (28.7) |
51.9 (29.9) |
61.0 (32.1) |
NWR |
N |
– |
89 |
90 |
|
Range (# species) |
– |
0 – 18 |
0 – 17 |
|
Mean (SD) |
– |
7.9 (3.9) |
7.9 (3.9) |
LWAD |
N |
– |
91 |
92 |
|
Range (# individuals) |
– |
0 – 286 |
0 – 278 |
|
Median (IQR) |
– |
47 (69) |
62 (69.5) |
WSD |
N |
– |
79 |
80 |
|
Range (# individuals) |
– |
0 – 146 |
0 – 819 |
|
Median (IQR) |
– |
1 (21) |
9 (40.7) |
NPHC |
N |
91 |
92 |
93 |
|
Range (%) |
0 – 72 |
0 – 85 |
0 – 86 |
|
Median (IQR) |
13 (20) |
22 (29.5) |
26 (33) |
NPHR |
N |
– |
89 |
90 |
|
Range (# species) |
– |
0 – 24 |
0 – 24 |
|
Mean (SD) |
– |
9.0 (5.0) |
9.9 (4.8) |
NAHC |
N |
79 |
80 |
81 |
|
Range (%) |
0 – 17 |
0 – 40 |
0 – 78 |
|
Median (IQR) |
0 (4) |
3 (8) |
4 (9.8) |
NAHR |
N |
– |
77 |
78 |
|
Range (# species) |
– |
0 – 22 |
0 – 26 |
Notes: “N” gives the number of plots used in analyses where the variable listed served as the response. Where variable distributions were right-skewed, medians and interquartile ranges (IQR) are given instead of means and standard deviations (SD). PEC = percent exotic cover; NWC = percent native woody species cover; NWR= native woody species richness; LWAD = live woody species adult density in 48m2; WSD = woody species seedling density in 48m2; NPHC = percent native perennial herb cover; NPHR = native perennial herb richness; NAHC = percent native annual herb cover; NAHR = native annual herb richness.