prescribed fire requires igniting grasslands/forests in a designed burn
Source: National Park Service, Wildland firefighter uses drip torch at Manassas National Battlefield Park
prescribed fire requires igniting grasslands/forests in a designed burn
Source: National Park Service, Wildland firefighter uses drip torch at Manassas National Battlefield Park
Flowering plants (angiosperms) evolved in the Cretaceous Period starting 130 million years ago. The earliest known flowers are found as remnants of charcoal that was preserved in sediments. Constant wildfire, at a time when oxygen levels were higher, caused constant habitat change.
In contrast to flowerless gymnosperms such as pine trees, flowering plants rapidly produced seeds. Rapid life cycles and changing ecological conditions allowed for fast evolution of flowering plants. By the end of the Cretaceous Period, the majority of plants were flowering. The Chicxulub impact 66 million years ago caused fires across the entire globe, but seeds sprouted and renewed the dominance of flowering plans through modern times.1
Humans have been using wildfire to transform the landscape for 85,000 years, long before the development of agriculture. Ancient hunters in Africa around Lake Malawi preferred fire-tolerant open woodlands, rather than a forest with a closed canopy. In Australia 11,000 years ago, indigenous peoples were setting fires to manage vegetation.
Humans altered the natural seasonal rhythm of wildfire to create a mixture of plants that offered greater opportunity to hunt game, creating an artificial "pyrodiversity" of species.2
dry grass is converted into ash behind the flame front, but roots can survive
Source: National Park Service, Prescribed fire at Manassas National Battlefield Park
small fires recycle nutrients and reduce fuel loads
Source: National Park Service, Prescribed fire burns woody material
prescribed fire is used to deter tree growth and maintain open grasslands that preserve historic views at Manassas Battlefield
Source: National Park Service, Fire burns vegetation at Manassas National Battlefield Park
areas to be burned in a prescribed fire are isolated by firebreaks, with a team of firefighters to prevent escape to areas not planned to be burned
Source: National Park Service, Manassas prescribed fire November 20, 2019
firebreaks are established before prescribed fires are ignited
Source: National Park Service, Manassas prescribed fire November 20, 2019
prescribed fires are controlled by trained personnel to prevent them from becoming wildfires
Source: Historic Prince William, NE section of Brawner Farm Interpretive Center - #157 (by David Cuff on March 29, 2019)
a prescribed burn at Prince William Forest Park next to Scenic Lane demonstrates the small size of the fire front
Source: National Park Service, PRWI Rx Burn (by Mike Custodio, March 22, 2023)
in the November 2023 drought, wildfires were active in all physiographic provinces except the Coastal Plain
Source: Virginia Department of Forestry, Wildfire Public Viewer, US Drought Monitor
prescribed fire is used as a cost-effective tool for managing habitat
Source: Virginia Department of Wildlife Resources, How DWR Uses Fire to Restore the Wild: Good Fire
evidence of a 2016 prescribed fire in Paul State Forest was still clear in 2023