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Published online 11 January 2008
Published in Soil Sci Soc Am J 72:111-118 (2008)
DOI: 10.2136/sssaj2006.0292
© 2008 Soil Science Society of America
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Soil Scarification and Wildfire Interactions and Effects on Microbial Communities and Carbon

Aida E. Jiménez Esquilína,b, Mary E. Strombergera,* and Wayne D. Shepperdc

a Dep. of Soil and Crop Sciences, Colorado State Univ., Fort Collins, CO 80523-1170
b USDA-ARS Appalachian Farming Systems Research Center, 1224 Airport Rd., Beaver, WV 25813
c USDA Forest Service, Rocky Mountain Research Station, 240 West Prospect St., Fort Collins, CO 80526-2098


Figure 1
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  		Fig. 1. Mean biomass of (A) total and active fungi and (B) total bacteria in a ponderosa pine forest soil affected by scarification in 1981, a high-severity surface fire in 2002, or both. Mineral soil samples (0–10-cm depth) were collected and analyzed by direct microscopy in June 2005. Standard error bars (±1) are shown. Means labeled with different letters are significantly different ({alpha} = 0.10); total fungal biomass means are separated by uppercase letters and active fungal biomass means are separated by lowercase letters.

 

Figure 2
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  		Fig. 2. Principal components (PC) analysis of the microbial community structure based on ester-linked fatty acid methyl ester (EL-FAME) profiles in a ponderosa pine forest soil that was scarified in 1981, burned in a high-severity surface burn in 2002, or both. Mineral soil samples (0–10-cm depth) were collected and analyzed in June 2005. Individual samples as well as the average PC scores for each treatment are shown along with standard error bars (±1). The amount of variability explained by each PC axis is shown in parentheses.

 




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