Settler farming ended prairie fires and converted grassland to oak woodland
Evidence
In the 1840’s a new animal, the settler, intervened in the prairie battle. He didn’t mean to, he just plowed enough fields to deprive the prairie of its immemorial ally: fire. Seedling oaks forthwith romped over the grasslands in legions, and what had been the prairie region became a region of woodlot farms. If you doubt this story, go count the rings on any set of stumps on any ‘ridge’ woodlot in southwest Wisconsin. All the trees except the oldest veterans date back to the 1850’s and the 1860’s, and this was when fires ceased on the prairie. — Aldo Leopold, A Sand County Almanac, 116
Categorization
- XREF: A textbook case of disturbance-history reading central to Reading the Landscape — the tree rings date a land-use event. — connects to: Fences made continuous grazing lethal to Silphium where buffalo pasturing had been tolerable — Aldo Leopold, A Sand County Almanac: With Other…, 181; Bur oak’s thick corky bark evolved as armor against prairie fires — Aldo Leopold, A Sand County Almanac: With Other…, 111; Fire suppression created monocultural forests that mid-frequency burning heals — Robin Wall Kimmerer, Gathering Moss: A Natural and Cultural…, 303 (+2 more)
- SEED: Model essay: how to date a landscape transformation from living evidence (rings, stumps) rather than documents.
Broader Connections
- Bur oak’s thick corky bark evolved as armor against prairie fires
#expands(0.85) — Aldo Leopold, A Sand County Almanac, 111 - Fire suppression created monocultural forests that mid-frequency burning heals
#expands(0.80) — Robin Wall Kimmerer, Gathering Moss, 303 - Historical grassland disturbance regimes are unrecoverable because native agents were eliminated
#complicates(0.80) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 510 - Fire suppression restructures the whole ecosystem and reduces overall wildlife diversity
#expands(0.75) — Miron L. Heinselman, Fire in the Virgin Forests of the…, 442