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A controlled burn or prescribed burn (Rx burn) is the practice of intentionally setting a fire to change the assemblage of vegetation and decaying material in a landscape. The purpose could be for forest management , ecological restoration , land clearing or wildfire fuel management.
A backfire is a more aggressive type of burning done to influence the behavior of the main fire. In forest and prairie management, the driptorch is the most common tool used to ignite prescribed burns, which are used to remove excess fuel buildup or to re-create natural cycles of fire in an ecosystem .
Recently efforts have been undertaken by the Canada Parks system to incorporate prescribed burns. What they have found is a reduction in wildfire intensity in parks using prescribed burns though they did uncover some problems. In area with prescribed burns and a high herbivore population experience negative effects regarding in sapling occurrence.
This study showed that prescribed fires maintained the richness of the area. Fire burns are particularly needed to sustain native plant species. They increased the proportion of native plants to non-native plants and the richness of native plants. Fall burning, in particular, increased overall and native richness.
Wildfire prevention programs around the world may employ techniques such as wildland fire use (WFU) and prescribed or controlled burns. [121] [122] Wildland fire use refers to any fire of natural causes that is monitored but allowed to burn. Controlled burns are fires ignited by government agencies under less dangerous weather conditions. [123]
Broadcast burning is commonly used to prepare clearcut sites for planting, e.g., in central British Columbia, [175] and in the temperate region of North America generally. [176] Prescribed burning is carried out primarily for slash hazard reduction and to improve site conditions for regeneration; all or some of the following benefits may accrue:
The techniques available for controlling the spread of invasive species can be broadly defined into six categories: [29] Cultural practices, including controlled burns and timbering. An example of this in action is the use of prescribed burns in the Everglades to control Melaleuca quinquenervia trees.
Broadcast burning is commonly used to prepare clearcut sites for planting, e.g., in central British Columbia, [26] and in the temperate region of North America generally. [27] Prescribed burning is carried out primarily for slash hazard reduction and to improve site conditions for regeneration; all or some of the following benefits may accrue: