Natural fire rotation quantifies fire’s role and grounds fire-management targets.

Evidence

We need a measure of the amount of fire in ecosystems that defines the average rate at which new forest generations were established in natural fire-dependent systems. I propose the term Natural Fire Rotation for this concept. By this I mean simply the average number of years required in nature to burn-over and reproduce an area equal to the total area under consideration. Such a statistic can be calculated with some precision only if fire history maps are available for a relatively long period when man had little direct effect on the system. But even if only crude approximations can be obtained, such estimates have value because they permit direct comparisons between ecosystems for scientific purposes and provide guidelines for fire management programs. — Miron L. Heinselman, Fire in the Virgin Forests of the…, 320

Categorization

• DEFINE: Defines the study’s key metric (Natural Fire Rotation) that anchors comparisons of disturbance regimes.
• SEED: The idea that a mean statistic obscures real variability (next paragraph) is a clean hook for how averages flatten landscapes.
• XREF: connects to: Natural fire rotation in the BWCA was about 100 years — Miron L. Heinselman, Fire in the Virgin Forests of the…, 2; Restoring the natural regime means burning roughly 4,200 Canoe Area acres yearly — Miron L. Heinselman, Fire in the Virgin Forests of the…, 466; The Canoe Area burned and regenerated on about a 100-year rotation. — Miron L. Heinselman, Fire in the Virgin Forests of the…, 322 (+1 more)

Related

• The Canoe Area burned and regenerated on about a 100-year rotation. (similarity 0.90)
• Natural fire rotation in the BWCA was about 100 years (similarity 0.89)
• Restoring the natural regime means burning roughly 4,200 Canoe Area acres yearly (similarity 0.86)
• A fire regime is defined by four interacting parameters (similarity 0.84)
• Surface fires returned every 36 years on average in surviving pine stands. (similarity 0.83)
• The BWCA still has a roughly 60-year window before fire exclusion makes restoration impossible. (similarity 0.82)
• Fire is an intrinsic ecosystem component, not an unnatural disturbance, in the Canoe Area. (similarity 0.82)
• Five fire years created nearly three-quarters of today’s forest stands. (similarity 0.81)
• No large BWCA burns since 1936 already eliminated early postfire communities. (similarity 0.81)
• Man-controlled burning can still yield a natural ecosystem (similarity 0.81)
• The entire BWCA ecosystem was fire-dependent (similarity 0.80)
• Virtually every BWCA forest stand regenerated after fire since 1595 (similarity 0.80)
• Historic burns of 100,000 acres can no longer be allowed in the Canoe Area (similarity 0.80)
• Virtually every BWCA virgin forest stand burned since 1595. (similarity 0.79)

Broader Connections

• A fire regime is defined by four interacting parameters #expands (0.80) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 591