Table 1 Elements of live tree and snag structure and composition in relict forests at Whiskeytown National Recreation Area, California, USA. Pines consist of ponderosa pine and sugar pine; oaks consist of black oak and canyon live oak.
From: Fire-Excluded Relict Forests in the Southeastern Klamath Mountains, California, USA
Douglas-fir | White fir | Pines | Incensecedar | Oaks | Tanoak | Other | Total | |||
|---|---|---|---|---|---|---|---|---|---|---|
Live trees | Number (n) | Total | 1534 | 2513 | 2097 | 20 | 1527 | 1472 | 164 | 9327 |
Relicts | 61 | 75 | 628 | 20 | 44 | 2 | 0 | 831 | ||
Encroachment | 1473 | 2438 | 1469 | 0 | 1483 | 1469 | 164 | 8496 | ||
Density (trees ha−1) | Mean | 77.0 | 126.0 | 105.0 | 1.0 | 76.0 | 74.0 | 8.0 | 466.0 | |
SE | 32.4 | 82.6 | 41.6 | 0.5 | 28.8 | 33.8 | 4.6 | 96.7 | ||
Percentage | 16.0 | 28.0 | 22.0 | 0.0 | 16.0 | 16.0 | 2.0 | 100.0 | ||
Median | 23.0 | 0.0 | 31.0 | 0.0 | 5.0 | 0.0 | 0.0 | 314.0 | ||
dbh (cm) | QMD | 26.3 | 16.7 | 30.6 | 79.3 | 21.6 | 22.0 | 23.1 | 24.0 | |
Median | 15.2 | 5.1 | 5.1 | 30.5 | 15.2 | 15.2 | 10.2 | 15.2 | ||
Basal area (m2 ha− 1) | Mean | 4.2 | 2.8 | 7.7 | 0.5 | 2.8 | 2.8 | 0.3 | 21.1 | |
SE | 1.0 | 1.1 | 1.2 | 0.2 | 0.9 | 1.1 | 0.2 | 1.4 | ||
Percentage | 20.0 | 13.0 | 37.0 | 2.0 | 13.0 | 13.0 | 2.0 | 100.0 | ||
Median | 3.4 | 0.0 | 6.9 | 0.0 | 1.0 | 0.0 | 0.0 | 21.1 | ||
Relicts | Density (trees ha−1) | Mean | 3.0 | 4.0 | 31.0 | 1.0 | 2.0 | 0.0 | 0.0 | 42.0 |
SE | 1.2 | 2.3 | 13.5 | 0.5 | 1.0 | 0.1 | 0.0 | 13.8 | ||
Percentage | 7.0 | 9.0 | 76.0 | 3.0 | 5.0 | 0.0 | 0.0 | 100.0 | ||
Median | 0.0 | 0.0 | 18.0 | 0.0 | 0.0 | 0.0 | 0.0 | 26.0 | ||
Encroachment | Density (trees ha−1) | Mean | 74.0 | 122.0 | 73.0 | 0.0 | 74.0 | 73.0 | 8.0 | 425.0 |
SE | 32.2 | 82.8 | 40.6 | 0.0 | 28.9 | 33.9 | 4.6 | 101.6 | ||
Percentage | 17.0 | 29.0 | 17.0 | 0.0 | 17.0 | 18.0 | 2.0 | 100.0 | ||
Median | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 279.0 | ||
Snags | Density (trees ha−1) | Mean | 14.0 | 1.0 | 16.0 | 0.0 | 0.0 | 3.0 | 0.0 | 35.0 |
SE | 10.0 | 0.9 | 8.6 | 0.0 | 0.2 | 2.1 | 0.1 | 12.1 | ||
Percentage | 41.0 | 4.0 | 45.0 | 0.0 | 1.0 | 9.0 | 0.0 | 100.0 | ||
Median | 0.0 | 0.0 | 2.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | ||
dbh (cm) | QMD | 8.5 | 55.1 | 28.7 | 81.3 | 53.2 | 20.3 | 58.5 | 24.4 | |
Median | 5.1 | 45.7 | 10.2 | 81.3 | 45.7 | 15.2 | 50.8 | 10.2 | ||
Basal area (m2 ha−1) | Mean | 0.1 | 0.3 | 1.0 | 0.0 | 0.1 | 0.1 | 0.0 | 1.6 | |
SE | 0.05 | 0.27 | 0.27 | 0.02 | 0.04 | 0.06 | 0.02 | 0.34 | ||
Percentage | 5.0 | 19.0 | 62.0 | 1.0 | 5.0 | 6.0 | 1.0 | 100.0 | ||
Median | 0.0 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 |