Contrasting stand ages let fire boundaries be traced on airphoto maps.

Evidence

The final stand-origin maps (Fig. 2) show stand boundaries defined either by natural features, such as lakes, streams, and swamps, or by stand limits taken from 1948 cover-type maps of the Superior National Forest. The latter are published, high-quality maps based on stereoscopic interpretation of 1948 airphotos. Many fire boundaries were easily traced on these maps once the contrasting stand ages were established in the field. — Miron L. Heinselman, Fire in the Virgin Forests of the…, 97

Categorization

• DEFINE: Describes the reverse logic: mapped stands of contrasting origin dates reveal where burns stopped — reading present structure back to past disturbance.
• XREF: connects to: Firebreaks structured which species occupied which landscape positions — Miron L. Heinselman, Fire in the Virgin Forests of the…, 2; Coring dominant fire-adapted trees dates stand origin after burns. — Miron L. Heinselman, Fire in the Virgin Forests of the…, 93; Virtually every BWCA forest stand regenerated after fire since 1595 — Miron L. Heinselman, Fire in the Virgin Forests of the…, 2 (+1 more)

Related

• Coring dominant fire-adapted trees dates stand origin after burns. (similarity 0.84)
• Virtually every BWCA forest stand regenerated after fire since 1595 (similarity 0.83)
• Community vegetation maps remain unlinked to exact stand ages (similarity 0.83)
• Fire in old forest leaves a distinctive two-age-class structure (similarity 0.83)
• Five fire years created nearly three-quarters of today’s forest stands. (similarity 0.82)
• The landscape mosaic remains fire-created even after sixty years of suppression. (similarity 0.81)
• Documented fire history undercounts actual fires due to evidence decay. (similarity 0.81)
• Virtually every BWCA virgin forest stand burned since 1595. (similarity 0.81)
• Surface fires returned every 36 years on average in surviving pine stands. (similarity 0.80)
• Forest age and composition changes cluster along disturbance-history boundaries (similarity 0.79)

Broader Connections

• Forest age and composition changes cluster along disturbance-history boundaries #expands (0.78) — Tom Wessels, Forest Forensics, 30