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Fire regimes of United States plants. Savannas have regimes of a few years: blue, pink, and light green areas. When first encountered by Europeans, many ecosystems were the result of repeated fires every one to three years, resulting in the replacement of forests with grassland or savanna, or opening up the forest by removing undergrowth. [23]
Broad-scale evidence of fire exclusion is strong across disciplines and western forest ecosystems. Although high severity fire was a component of many historical fire regimes, the frequency and extent of high severity fire over the past few decades is outside the range of historical range of variability
Managers must also take into account, however, how invasive and non-native species respond to fire if they want to restore the integrity of a native ecosystem. For example, fire can only control the invasive spotted knapweed (Centaurea maculosa) on the Michigan tallgrass prairie in the summer, because this is the time in the knapweed's life ...
Fire started by lightning has always been a part of the natural life cycle in the Western U.S., and for centuries Native Americans also carried out controlled burns, referred to as cultural burns ...
The Grass Fire (1908) by Frederic Remington depicts Native American men setting fire to a grassy plain. Native American use of fire in ecosystems are part of the environmental cycles and maintenance of wildlife habitats that sustain the cultures and economies of the Indigenous peoples of the Americas. Indigenous peoples have used burning ...
Native American use of fire - Other native uses of fire. Terra preta - Use of burning in South America agricultural use rather than grassland. Prairie remnant - Pre-Columbian fire dependent habitats of North America
Bison were once near extinction. The North American bison is an important animal for many plains tribes in the United States, and tribes like the Cherokee Nation in Oklahoma play a part in that ...
Fire suppression has changed the composition and ecology of North American habitats, including highly fire-dependent ecosystems such as oak savannas [54] [55] and canebrakes, [56] [57] which are now critically endangered habitats on the brink of extinction. In the Eastern United States, fire-sensitive trees such as the red maple are increasing ...