Report: Lodgepole Pine—History and Management
|
CRATER LAKE Report: Lodgepole Pine—History and Management |
|
APPENDIX E (2)
Comparison of age structure of the principal plant communities. Mean interval between classes was calculated as the mean of the intervals between two consecutive P. contorta age classes at least one of which antedates 1850. Community 3 = P. contorta/Carex - Stipa; 4 = P. contorta/Carex - Lupinus; 8 = A. magnifica var. shastensis - T. mertensiana/Carex - Lupinus; 7 = A. lasiocarpa/Haplopappus/Aster - Elymus; 10 = T. mertensiana/Vaccinum; 11 = Mixed Conifer/Arctostaphylos.
| Mean | Mean Stand Age | Mean Age of Latest Class |
Mean No. Classes Per Plot | Mean Interval Between Classes* (Years) |
|---|---|---|---|---|
| 3 | 175 | 131 | 2.4 | 60 |
| 4 | 115 | 96 | 1.7 | 48 |
| 8 | 122 | 109 | 1.6 | 40 |
| 7 | 112 | 98 | 1.5 | 48 |
| 10 | 128 | 115 | 1.4 | 27 |
| 11 | 151 | 141 | 1.7 | 25 |
*Only plots with multiple age classes.
|
Mean Stand Age 3>4, 3>7, 3>8 (p = .01) 3>10 (p = .05) 11>4, 11>7, 11>8 (p = .05) Mean Age of Latest Class 3>4, 3>7 (p = .01) 3>8 (p = .05) 8>4, 8>7 (p = .01) 11>4, 11>8, 11>7 (p = .01) 11>10 (p = .05) |
Mean Class Interval Not significantly different Mean No. Classes Per Plot 3>8 (p = .01) 3>4, 3>10, 3>7 (p = .05) 11>10 (p = .05) |
| <<< PREVIOUS | CONTENTS | NEXT >>> |