Table 3 Mean (±SE) seedling and tree (>5 cm dbh) densities (no. per 100 m2 for seedlings, no. per ha for trees; excluding giant sequoia) and basal area in retention harvest, wildfire, or control (no harvest or wildfire) stands at the Bearskin, Black Mountain, Case Mountain, and Redwood Mountain groves of the southern Sierra Nevada, California. Values are based on individual plot data for each grove and treatment type (n = 25 in all cases except Case Mountain control: n = 20).
From: Giant Sequoia Regeneration in Groves Exposed to Wildfire and Retention Harvest
Size class Tree species | Bearskin | Black Mountain | Case Mountain | Redwood Mountain | |||||
|---|---|---|---|---|---|---|---|---|---|
Harvest | Control | Harvest | Fire | Control | Fire | Control | Fire | Control | |
Small seedlings (no. per 100 m2) | |||||||||
White fir | 10.0 | 35.0 | 5.8 | 48.0 | 14.0 | 59.0 | 12.0 | 8.4 | 44.0 |
(3.0) | (10.0) | (2.5) | (10) | (3.4) | (10.0) | (3.0) | (2.1) | (19.0) | |
Sugar pine | 0.3 | 3.7 | 0.1 | 0.0 | 0.0 | 2.7 | 0.1 | 0.1 | 0.1 |
(0.2) | (0.9) | (0.1) | (0.9) | (0.1) | (0.1) | (0.1) | |||
Incense cedar | 1.0 | 7.5 | 5.8 | 2.3 | 1.7 | 5.1 | 2.2 | 6.9 | 2.1 |
(0.5) | (3.8) | (3.2) | (1.1) | (1.0) | (3.4) | (0.9) | (1.8) | (1.2) | |
Black oak | 1.5 | 4.5 | 1.7 | 6.4 | 3.6 | 5.7 | 12.0 | 0.7 | 1.3 |
(0.7) | (1.0) | (0.8) | (1.9) | (0.9) | (1.9) | (3.0) | (0.4) | (0.4) | |
Large seedlings (no. per 100 m2) | |||||||||
White fir | 5.7 | 1.5 | 4.8 | 1.6 | 0.9 | 33.0 | 2.6 | 10.9 | 8.2 |
(1.9) | (0.5) | (1.3) | (0.7) | (0.3) | (8.0) | (0.9) | (3.6) | (2.6) | |
Sugar pine | 0.3 | 1.4 | 0.1 | 0.0 | 0.1 | 0.4 | 0.5 | 0.5 | 0.2 |
(0.2) | (0.6) | (0.1) | (0.1) | (0.2) | (0.3) | (0.3) | (0.1) | ||
Incense cedar | 0.8 | 0.0 | 2.4 | 1.1 | 0.7 | 0.7 | 2.7 | 8.3 | 2.8 |
(0.4) | (0.9) | (0.9) | (0.4) | (0.3) | (0.6) | (2.0) | (1.3) | ||
Black oak | 0.1 | 0.0 | 0.5 | 0.0 | 0.1 | 0.2 | 1.3 | 0.3 | 0.0 |
(0.1) | (0.3) | (0.1) | (0.2) | (0.8) | (0.2) | ||||
Trees (no. ha−1) | |||||||||
White fir | 25.0 | 276.6 | 64.9 | 276.8 | 235.2 | 142.8 | 376.0 | 6.5 | 149.3 |
(11.1) | (34.5) | (14.0) | (31.7) | (39.8) | (24.0) | (65.6) | (3.6) | (31.3) | |
Sugar pine | 12.5 | 62.1 | 2.2 | 6.2 | 16.6 | 30.3 | 27.1 | 6.5 | 10.8 |
(6.1) | (17.3) | (2.2) | (3.5) | (5.0) | (11.3) | (7.3) | (4.8) | (7.0) | |
Incense cedar | 54.1 | 24.0 | 6.5 | 99.9 | 70.8 | 28.1 | 94.7 | 13.0 | 101.7 |
(18.8) | (8.8) | (4.8) | (17.5) | (20.5) | (13.7) | (24.5) | (7.2) | (31.3) | |
Black oak | 6.2 | 0.0 | 0.0 | 62.4 | 8.3 | 8.7 | 8.1 | 2.2 | 2.2 |
(4.7) | (17.5) | (4.9) | (6.8) | (4.4) | (2.2) | (2.2) | |||
Ponderosa pine | 4.2 | 0.0 | 86.6 | 0.0 | 0.0 | 4.3 | 5.4 | 17.3 | 0.0 |
(2.9) | (24.4) | (3.0) | (5.4) | (8.1) | |||||
All treesa | 210.0 | 370.7 | 303.0 | 457.8 | 380.8 | 305.2 | 527.5 | 320.3 | 316.0 |
(34.0) | (39.0) | (33.6) | (39.1) | (48.0) | (38.9) | (64.1) | (68.9) | (42.6) | |
Basal area (m2 ha−1) | |||||||||
All stems | 13.2 | 53.1 | 35.7 | 34.9 | 51.9 | 60.9 | 56.8 | 24.5 | 43.7 |
(1.2) | (5.5) | (4.2) | (2.8) | (5.1) | (7.3) | (6.9) | (2.6) | (5.2) | |