Impact of Fire on the Geology of Soils Essay -- Wildfires and Soil Geo

Fires are an important and healthy process in many ecosystems. The lack of fires can cause impudent plant communities to invade an area . The regular occurrence of fires can keep one plant community dominate, like oak savannas. Fires can leave sack sticks the size of trees and clumps of charcoal where bunch grass use to grow, but not for long. An area that was burned will re-grow, grasslands will be green the next growth season and qualitys will typically show new growth soon after. Somewhere in the process of a fire the soil it travels over is effected. Alterations evanesce immediately after a fire passes over a soil and can continue years after a fire has gone. Soils are force in two main ways by the entering of nutrients form the brunt organic matter (living vegetation and by the litter on the surface of the soil) and the heat of the soil and the nutrients already present in the soil. The greater the duration and intensity of the fire will influence the amount of alteratio n of the soil. A prescribed burn is usually less intense than a wildfire. Prescribed burns are put on when conditions are right, meaning that the area is not too change or too large. Wildfires on the other hand can start at any time and burn vast areas and last for days pop out of control. matchless reason wildfires usually are more intense than prescribed burns is because of the fire suppression that lasted most of this century allowed large amounts of fuel to heap up waiting to be burned. Vegetation in these areas will grow back regardless, but it is the soils that have a harder time recovering from the intense heat. One other difference to consider when looking at the types of fires, is a afforest fire verses a grassland fire. quality fires usually last longer and h... ... A., 1989, Effect of bastard forest fire on the availability of N and P in Mediterranean soils Plant Soil. v. 120, p. 57-63. Mroz, G. D., Jurgensen, M. F., Harvey, A. E., and Larsen, M. J., 1980, Effects of fire on nitrogen in forest floor horizons Soil Science Society of America Journal, v. 44, p. 395-400.Prieto-Fernandez, A., Villar, M. C., Carballas, M. and Carballas, T., 1993, Short-term effects of a wildfire on the nitrogen status and its mineralization kinetics in an Atlantic forest soil Soil Biology and Biochemistry, v. 25, p. 1657-1664. Ulery, A. L. and Graham, R. C., 1993, Forest fire effects on soil color and texture Soil Science Society of America Journal, v. 57, p. 135-140.Ulery, A. L., Graham, R.C. and Bowen, L. H., 1996, Forest fire effects on phyllosilicates in California Soil Science Society of America Journal, v. 60, p. 309-315.