Biomass production and fire regimes
Results
Random member from the normal probability distribution  Time steps (years) to reach a stable age distribution  

SD  Maximum  Minimum  Mean  Minimum  Maximum  SE 
0.001

0.304

0.296

15.900

7.000

33.000

2.738

0.002

0.309

0.292

54.700

14.000

132.000

10.627

0.003

0.314

0.287

199.800

11.000

664.000

61.455

0.004

0.318

0.284

982.300

70.000

2418.000

190.328

SD = standard deviation, SE = standard error.
Cumulative forest age distribution.
Average forest age distributions under fire cycles of 6 638 (a and b), 1 885 (c and d), 1064 (e and f), 297 (g and h), and 125 (i and j) years with different initial conditions. The graphs in column A were simulated from a randomly initiated landscape, and graphs in column B were simulated from a real landscape with a large area of older forests.
Time series of the ideal historical fire data set used in this analysis.
Simulated annual fire number (A), area burned (B), and mean forest age in years (C) of the constructed ideal fire data set.
Fire cycles estimated from different numbers of fire maps and three different starting years.
Fire cycles estimated from standorigin maps at 10year intervals by a nonlinear curvefitting procedure resulted in spatial fire ignition patterns in Alberta (1961–1995): (a) lightning–caused fires and (b) humancaused fires (gray area represents forested land).
Effect of fire suppression on fire regimes: (a) fire cycle, (b) numbers of fires per year, (c) mean annual area burned, and (d) mean fire size.
Effect of fire suppression on forest dynamics is shown in terms of mean forest age (a and b), mean volume (c and d), mean basal area (e and f), mean volume increment (g and h), and mean volume burned (i and j).
Effect of fire suppression on forest dynamics is shown in terms of mean forest age (a and b), mean volume (c and d), mean basal area (e and f), mean volume increment (g and h), and mean volume burned (i and j).
Simulated forest age distributions under different fire cycles.
Agespecific mortality and stable forest age distributions.
Agespecific mortality and stable forest age distributions.
The simulation results of stable age distributions (right column, gl) under different curves (left column, af), including constant (a and g), linear increase (b and h), linear decrease (c and i), logistic curves (d and j), and domed shapes (e and k, as well as f and l).
Project status
 Ongoing