Impacts of low-intensity prescribed fire on microbial and chemical soil properties in a Quercus frainetto forest

Abstract

Prescribed fire is a common economical and effective forestry practice, and therefore it is important to understand the effects of fire on soil properties for better soil management. We investigated the impacts of low-intensity prescribed fire on the microbial and chemical properties of the top soil in a Hungarian oak (Quercus frainetto Ten.) forest. The research focused on microbial soil parameters (microbial soil respiration (R_SM), soil microbial biomass carbon (Cmic) and metabolic quotient (qCO₂) and chemical topsoil properties (soil acidity (pH), electrical conductivity (EC), carbon (C), nitrogen (N), C/N ratio and exchangeable cations). Mean annual comparisons show significant differences in four parameters (C/N ratio, soil pH, Cmic and qCO₂) while monthly comparisons do not reveal any significant differences. Soil pH increased slightly in the burned plots and had a significantly positive correlation with exchangeable cations Mg, Ca, Mn and K. The mean annual C/N ratio was significantly higher in the burned plots (28.5:1) than in the control plots (27.0:1). The mean annual Cmic (0.6 mg g⁻¹) was significantly lower although qCO₂ (2.5 µg CO₂–C mg Cmic h⁻¹) was significantly higher, likely resulting from the microbial response to fire-induced environmental stress. Low-intensity prescribed fire caused very short-lived changes. The annual mean values of C/N ratio, pH, Cmic and qCO₂ showed significant differences.

Keywords

C/N / Exchangeable cations / Microbial biomass carbon / qCO₂ / Soil pH

References

[1] Alef K, Nannipieri P. Alef K, Nannipieri P. Estimation of microbial activites. Methods in applied soil microbiology and biochemistry, 1995, Cambridge: Academic press 214 216

[2] Anderson TH, Domsch KH. Carbon assimilation and microbial activity in soil. J Plant Nutr Soil Sci, 1986, 149: 457-468.

[3] Bento-Gonçalves A, Vieira A, Úbeda X, Martin D. Fire and soils: key concepts and recent advances. Geoderma, 2012, 191: 3-13.

[4] Berber AS, Tavşanoğlu Ç, Turgay OC. Effects of surface fire on soil properties in a mixed chestnut-beech-pine forest in Turkey. Flamma, 2015, 6(2): 78-80.

[5] Certini G. Effects of fire on properties of forest soils: a review. Oecologia, 2005, 143(1): 1-10.

[6] De Marco A, Gentile AE, Arena C, de Virzo Santo AV. Organic matter, nutrient content and biological activity in burned and unburned soils of a Mediterranean marquis area of southern Italy. Int J Wildland Fire, 2005, 14: 365-377.

[7] Eivazi F, Bayan MR. Effects of long-term prescribed burning on the activity of select soil enzymes in an oak–hickory forest. Can J For Res, 1996, 26: 1799-1804.

[8] Ferran A, Delitti W, Vallejo VR. Effects of fire recurrence in Quercus coccifera L. shrublands of the Valencia region (Spain): II. Plant and soil nutrients. Plant Ecol, 2005, 177: 71-83.

[9] Gonzalez-Perez JA, Gonzalez-Vila FJ, Almendros G, Knicker H. The effect of fire on soil organic matter—a review. Environ Int, 2004, 30: 855-870.

[10] Granged AJP, Zavala LM, Jordán A, Bárcenas-Moreno G. Post-fire evolution of soil properties and vegetation cover in a Mediterranean heathland after experimental burning: a 3-year study. Geoderma, 2011, 164: 85-94.

[11] Ilstedt U, Giesler R, Nordgren A, Malmer A. Changes in soil chemical and microbial properties after a wildfire in a tropical rainforest in Sabah, Malaysia. Soil Biol Biochem, 2003, 35: 1071-1078.

[12] Kantarcı MD. Sedir ormanlarının gençleştirilmesinde uygulanan yangın kültürü ile kültür bakımı yöntemlerinin ekolojik değerlendirilmesi, İ.Ü. Orman Fakültesi Dergisi Seri A, 1989, 39(2): 95-118. (In Turkish)

[13] Marcos E, Villalón C, Calvo L, Luis-Calabuig E. Short-term effects of experimental burning on soil nutrients in the Cantabrian heathlands. Ecol Eng, 2009, 35: 820-828.

[14] Meentemeyer RK, Rank NE, Anacker BL, Rizzo DM, Cushman JH. Influence of land-cover change on the spread of an invasive forest pathogen. Ecol Appl, 2008, 18: 159-171.

[15] Nave LE, Vance ED, Swanston CW, Curtis PS. Fire effects on temperate forest soil C and N storage. Ecol Appl, 2011, 21: 1189-1201.

[16] Parra JG, Rivero VC, Lopez TI. Forms of Mn in soils affected by a forest fire. Sci Total Environ, 1996, 181: 231-236.

[17] Pereira P, Úbeda X, Martin D, Mataix-Solera J, Guerrero C. Effects of a low severity prescribed fire on water-soluble elements in ash from a cork oak (Quercus suber) forest located in the northeast of the Iberian Peninsula. Environ Res, 2011, 111(2): 237-247.

[18] Pourreza M, Hosseini SM, Sinegani AAS, Matinizadeh M, Dick WA. Soil microbial activity in response to fire severity in Zagros oak (Quercus brantii Lindl.) forests, Iran, after one year. Geoderma, 2014, 213: 95-102.

[19] Scharenbroch BC, Nix B, Jacobs KA, Bowles ML. Two decades of low-severity prescribed fire increases soil nutrient availability in a Midwestern, USA oak (Quercus) forest. Geoderma, 2012, 183: 80-91.

[20] Tüfekçioğlu A, Küçük M, Sağlam B, Bilgili E, Altun L, Küçük Ö. Influence of fire on root biomass dynamics and soil respiration rates in young corsican pine (Pinus nigra) stands in Turkey. For Ecol Manag, 2006, 234: 195.

[21] Vega JA, Fontúrbel T, Merino A, Fernández C, Ferreiro A, Jiménez E. Testing the ability of visual indicators of soil burn severity to reflect changes in soil chemical and microbial properties in pine forests and shrubland. Plant Soil, 2013, 369(1–2): 73-91.

[22] Wang Q, Zhong M, Wang S. A meta-analysis on the response of microbial biomass, dissolved organic matter, respiration, and N mineralization in mineral soil to fire in forest ecosystems. For Ecol Manag, 2012, 271: 91-97.

[23] Wardle DA, Ghani A. Critique of the microbial metabolic quotient (qCO2) as a bioindicator of disturbance and ecosystem development. Soil Biol Biochem, 1995, 27: 1601-1610.

[24] Williams RJ, Hallgren SW, Wilson GW. Frequency of prescribed burning in an upland oak forest determines soil and litter properties and alters the soil microbial community. For Ecol Manag, 2012, 265: 241-247.

[25] Yildiz O, Esen D, Sarginci M, Toprak B. Effects of forest fire on soil nutrients in Turkish pine (Pinus brutia, Ten) ecosystems. J Environ Biol, 2010, 31: 11-13.