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Table 2 Summary statistics of plot-level pre-fire and post-fire stand structure of knobcone pine forests in Oregon and California, USA, by fire interval (Fire int) in years. Values represent median (minimum–maximum) values for each variable at each fire interval

From: Fire interval and post-fire climate effects on serotinous forest resilience

   Pre-fire Post-fire
Fire int
(years)
n Basal areaa
(m2 ha−1)
Stand densitya
(trees ha−1)
Canopy seed bankb
(cones ha−1)
Avg cones tree−1 Proportion knobcone pine
(by density)
Seedling density1
(trees ha−1)
Proportion knobcone pine
(by density)
Proportion second year seedlings
6 5 1.3 7261 348 0.1 1 249 1 1
(0.4–2.4) (4576–24,918) (149–846) (0.03–0.2) (1.00–1.00) (149–1442) (1.00–1.00) (1.00–1.00)
10 8 4.9 2338 5391 1.7 1 1183 1 0.89
(1.1–8.8) (162–7,894) (1415–10,544) (0.7–4.3) (1.00–1.00) (469–6875) (1.00–1.00) (0.71–1.00)
15 6 7.5 3366 3,222 1.3 1 1317 1 0.98
(3.8–25.3) (1210–4426) (668–6631) (0.3–2.4) (1.00–1.00) (943–2734) (1.00–1.00) (0.92–1.00)
16 14 8.4 1840 10,494 6.0 0.99 12,644 1 0.96
(0.5–30.7) (334–10,823) (501–47,619) (1.6–16.3) (0.16–1.00) (138–116,374) (0.51–1.00) (0.71–1.00)
17 7 7 2288 25,083 5.8 1 1890 1 0.97
(2.1–11.7) (842–6543) (4577–34,660) (4.4–12.8) (1.00–1.00) (289−13,174) (1.00–1.00) (0.85–1.00)
22 6 20.2 2143 13,959 7.7 1 10,469 1 1.00
(6.2–21.3) (305–4742) (157–29,692) (0.5–11.3) (1.00–1.00) (117−18,203) (1.00–1.00) (0.98–1.00)
31 6 26.7 3547 85,360 32.1 1 118,516 1 0.99
(11.6–38.1) (522–6543) (48,095–126,674) (12.1–92.1) (0.97–1.00) (39,219–250,156) (1.00–1.00) (0.98–1.00)
Long 19 16.5 865 17,350 80.6 0.91 13,766 1 0.93
(4.5–48.8) (79–3531) (6543–33,472) (2.0–214.1) (0.09–1.00) (599–134,062) (0.95–1.00) (0.86–1.00)
  1. aValues represent total basal area, stand density, and post-fire seedling density for conifer tree species only
  2. bCanopy seed bank represents open cones on knobcone pine only