Be Careful What You Wish For: the Legacy of Smokey Bear
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REVIEWS REVIEWS REVIEWS Be careful what you wish for: the legacy of 73 Smokey Bear Geoffrey H Donovan1* and Thomas C Brown2 A century of wildfire suppression in the United States has led to increased fuel loading and large-scale ecologi- cal change across some of the nation’s forests. Land management agencies have responded by increasing the use of prescribed fire and thinning. However, given the continued emphasis on fire suppression, current levels of funding for such fuel management practices are unlikely to maintain the status quo, let alone reverse the effects of fire exclusion. We suggest an alternative approach to wildfire management, one that places less emphasis on suppression and instead encourages managers to balance short-term wildfire damages against the long-term consequences of fire exclusion. However, any major change in wildfire management, such as the one proposed here, will shift the costs and benefits of wildfire management, inevitably raising opposition. Front Ecol Environ 2007; 5(2): 73–79 or 60 years, Smokey Bear has successfully champi- sity of many stands to increase (Figure 1), particularly in Foned fire suppression in the United States, but his forest types that have historically experienced frequent, success has come at considerable cost. Indeed, it could be low-intensity fires. Third, the suitability of forests as likened to the British victory over American rebels at habitat for a wide variety of wildlife species has been Bunker Hill in 1775, about which it was said, “A few altered, as a result of changes in canopy cover and the more such victories would surely spell ruin for the vic- composition and productivity of understory communi- tors”. We examine the historical roots and consequences ties. Ecological restoration treatments in northern of US wildfire suppression policy. In addition, we criti- Arizona, for example, doubled the diversity of the but- cally assess current efforts to ameliorate the effects of a terfly community and increased the total abundance of century of wildfire suppression. Finally, we offer an alter- butterflies by three- to fivefold (Waltz and Covington native approach to wildfire management that places less 2004). In addition to direct ecological effects, wildfire emphasis on suppression. suppression results in a buildup of forest fuel, which in Decades of aggressive wildfire suppression have caused turn contributes to more extreme fire patterns. More a number of profound ecological changes in some of the intense fires can change the species composition of a nation’s forests. First, the composition of some forests is stand (Hessburg and Agee 2003) and destroy seed banks shifting toward less fire-tolerant species (Arno and (Busse et al. 2005) in some forest types. Allison-Bunnell 2002). For example, in the western US, Increased fuel levels, along with drought conditions Douglas-fir (Pseudotsuga menziesii var glauca) and grand and warmer temperatures in much of the western US fir (Abies grandis) are encroaching upon stands previ- (Westerling et al. 2006), have also resulted in an ously dominated by ponderosa pine (Pinus ponderosa; increase in wildfire suppression costs (Calkin et al. Agee 1993). Second, fire exclusion has allowed the den- 2005). Federal wildfire suppression expenditures in the US exceeded $1 billion for the first time in 2000 and did so again in both 2002 and 2003. These record-high costs In a nutshell: were accompanied by record levels of area burned • A century of wildfire exclusion in the US has substantially (Figure 2). altered many of the nation’s forests and resulted in wildfires that are more expensive and more difficult to control • Current corrective policies, which emphasize fuel manage- Historical origins of wildfire exclusion ment, are often underfunded or infeasible • We propose a fundamental change in the way wildfire sup- For people raised in the Smokey Bear era, a policy of pression is funded, which would encourage managers to con- aggressive wildfire suppression may be taken for granted. sider the beneficial effects of wildfire However, in the early 20th century, there was an active debate about the appropriate role of fire in forest manage- ment. This debate was particularly intense in the south- 1USDA Forest Service Pacific Northwest Research Station, 620 SW east and the west, where fire had commonly been used as Main, Suite 400, Portland, OR 97205 *([email protected]); a management tool. Many landowners in these fire-prone 2USDA Forest Service Rocky Mountain Research Station, 2150-A regions recognized that, in some forest types, regular fire Centre Avenue, Fort Collins, CO 80527 was necessary to remove fuel that would otherwise build © The Ecological Society of America www.frontiersinecology.org The legacy of Smokey Bear GH Donovan and TC Brown 74 (a) (b) (a and b) courtesy of the Forest History Society, Durham, NC (a and b) courtesy of the Forest History Society, Figure 1. (a) Photograph by William H Illingworth, taken on the 1874 expedition to explore the Black Hills of South Dakota led by Brevet Major General George Armstrong Custer. Looking down Castle Creek, tracks can be seen on the valley floor, indicating wagons had passed this location. Held by the South Dakota State Historical Society. (b) Repeat photograph of Castle Creek Valley taken by Richard H Sowell in ca 1974 from near the same position. This photo shows forest expansion in the area following a century of fire exclusion. Held by the South Dakota Agricultural Experiment Station. up and pose a risk of a more destructive fire, a view suc- The pioneering forester and conservationist, Aldo cinctly stated by GL Hoxie (1910): Leopold, applauded the explosion of small trees in a pon- derosa pine forest in northern Arizona that followed “Why not by practical forestry keep the supply of removal of light fires (Leopold 1920): inflammable matter on the forest cover or carpet so limited by timely burning as to deprive even “It is also a known fact that the prevention of the lightning fires of sufficient fuel to in any man- light burning during the past 10 years…has ner put them in the position of master?... Fires to brought in growth on large areas where repro- the forests are as necessary as are crematories and duction was hitherto largely lacking. Actual cemeteries to our cities and towns; this is Nature’s counts show that the 1919 seedling crop runs process for removing the dead of the forest family as high as 100 000 per acre. It does not require and for bettering conditions for the living.” any very elaborate argument to show that these tiny trees, averaging only 2 inches high, The majority of professional foresters, however, opposed would be completely destroyed by even a light the use of fire. Most had been trained at forestry schools ground fire.” in the eastern US, where the curriculum was heavily influenced by German forest practices, which emphasized Although the views of Olmstead and Leopold were a scientific, ordered approach to forest management. shared by many foresters, some took a more nuanced These foresters, who viewed fires as killing small trees view of fire, including, at least for a time, the second that they believed would otherwise grow to maturity, chief of the US Forest Service, Henry Graves pejoratively referred to the light burning approach advo- (Stephens and Ruth 2005), as well as some academics cated by Hoxie and others as “Indian” forestry, a perspec- (most notably Herman Chapman). However, a number tive forcefully expressed by FE Olmstead in 1911 (in of factors solidified the forestry profession’s opposition Carle [2002]): to any use of fire. Foremost was the 1910 fire season, when 2 million ha of Forest Service land burned and 78 “It is said that we should follow the savage’s firefighters lost their lives. Wildfire exclusion was also example of ‘burning up the woods’ to a small consistent with the conservationist ideal of the extent in order that they may not be burnt up to Progressive Era, which was inclined to view fire as a greater extent bye and bye. This is not forestry; another force of nature to be tamed, not as a potential not conservation; it is simple destruction…the management tool. Government, first of all, must keep its lands pro- Even after the Forest Service adopted a policy of fire ducing timber crops indefinitely, and it is wholly exclusion, some foresters privately admitted that fire impossible to do this without protecting, encour- could be useful (Carle 2002). The following prescient aging, and bringing to maturity every bit of nat- statement was written in 1920 by SE White (White ural young growth.” 1920): www.frontiersinecology.org © The Ecological Society of America GH Donovan and TC Brown The legacy of Smokey Bear “…keep firmly in mind that fires have 75 1000 700 000 always been in the forests, centuries 900 and centuries before we began to med- 600 000 dle with them. The only question that 800 remains is whether, after accumulating 700 500 000 kindling by twenty years or so of ‘pro- 600 tection’, we can now get rid of it 400 000 safely… In other words, if we try to 500 burn it out now, will we not get a 400 300 000 destructive fire? We have caught the 300 200 000 bear by the tail – can we let it go?…In 200 this one matter of fire in the forests, the 100 000 100 5-year mean burned (thousands ha) area Forest Service has unconsciously cost ($ millions) 5-year mean suppression veered to the attitude of defense of its 0 0 1984 1986 1989 1991 1993 1995 1997 1999 2001 2003 theory at all costs. There is no con- Year scious dishonesty, but there is plenty of cost area human nature.” Figure 2.