texas a&m researcher examines impact of fire prevention on appalachian forestfeb 23 2017the impact of fire prevention since the early 20th century has altered the vegetation of the appalachian region according to a new reportfire was frequent in the past and an important shaper of vegetation in the appalachian forest – along with the rest of north america these werent the catastrophic forest fires we see in the news today they generally were moderate fires that burned through grasses shrubs and dry leaves with the implementation of fire prevention and suppression practices in the 20th century the vegetation has changed in ways that are harmful for certain species some of these species include oak and pine trees which have great value for timber and wildlife dr charles lafon professor and assistant department head in the department of geography at texas a&m university has been studying the history of fire since 2002 this research entails sawing cross-sections from fire-scarred trees and using the trees annual growth rings to determine in which years the scars were formed he recently partnered with colleagues from the university of arizona university of tennessee and us forest service to put together the publication fire history of the appalachian region: a review and synthesis this publication synthesizes fire history studies that used fire-scarred trees as well as other types of evidence such as charcoal fragments retrieved from soil or lake sediments the report was funded by the consortium of appalachian fire managers and scientists (cafms) according to lafon evidence shows that fire prevention has seriously altered the vegetation and environment of the appalachian region the fires prepared the environment like we prepare a garden explains lafon in the last few hundred years fires occurred frequently (every few years) up until the 1930s – and then pretty much stopped the vegetation has changed as a consequence some refer to this post 1930s period as the fire suppression era because the us forest service and other agencies have contained more fires through active suppression – such as fire lines and helicopters however dr lafon explains that suppression isnt the only reason for the decline in fire another important reason is fire prevention think smokey the bear prevention has been a major campaign with a goal of reducing the number of fires that are ignited in the first place so prevention and suppression have worked in tandem to virtually exclude fire from the landscapes of the eastern united states other factors have also contributed to the decline in fire – such as social and economic changes and landscape changes he added the consequence the vegetation is now much thicker and very different than it was in the past the forest has become a lot more dense so instead of woodlands with grass and diverse vegetation now we have a pretty dense forest with a lot of shade and a lot of shrubs said lafon species like maple trees which couldnt thrive under frequent burning are now overtaking the fire-tolerant vegetation we like maples theyre pretty but in terms of a wildlife perspective or timber perspective theyre just not as a valuable as the oaks and pines theyve grown a lot more dense and theyre outcompeting these fire-dependent species for resources explained lafon he continued at one time the trees that loved moist sites were constrained to the stream-side areas and the more fire-dependent drought-tolerant species were up on the ridges so now without fire the stream-side species have moved up on the ridges as the older pines and oaks die theyre being replaced – and the forest has transitioned into something different the once open forest which was favorable for species like pines and oaks has changed the forest has shifted in terms of what species live there how abundant certain species are how dense the forest is a change in wildlife and habitat and change in the timber quality added lafon the full report can be accessed here by: andrew vernon '06 fire scars embedded in tree rings