DOI: 10.1016/j.foreco.2014.04.009
Scopus记录号: 2-s2.0-84899865786
论文题名: Response of hardwood tree regeneration to surface fires, western Chaco region, Argentina
作者: Bravo S. ; Kunst C. ; Leiva M. ; Ledesma R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 326 起始页码: 36
结束页码: 45
语种: 英语
英文关键词: Carbonization
; Charring height
; Fire
; Forest fires
; Prescribed fires
; Woody species management
Scopus关键词: Carbonization
; Deforestation
; Fire resistance
; Fuels
; Reforestation
; Charring height
; Forest fires
; High severity fires
; Inner and outer barks
; Logistic regressions
; Prescribed fires
; Randomized design
; Woody species
; Fires
; Carbonization
; Deforestation
; Fire Resistance
; Forest Fires
; Fuels
; Reforestation
英文摘要: We assessed the response of seedlings and pole-sized individuals of Aspidosperma quebracho-blanco Schlecht., Schinopsis lorentzii (Griseb.) Engler and Ziziphus mistol Griseb. to surface fires. We assessed traits of fire resistance (bark thickness and bark density) and fire tolerance (mortality and sprouting type, basal or epicormic) in each species. Burns were carried out using two fine fuel loads (high, 8000kgha-1; and low 4000kgha-1, respectively) and two dates of fire application (early and late fire season). Field work was performed during 2008 and 2009. Using a randomized design, 120 2m×2m plots were burnt each year. Using ANOVA, we tested the effect of species, fuel load and date of fire on the bark char height of the bole. The resprouting pattern (basal or epicormic) and post-fire mortality (complete or top-kill) were analysed using a logistic regression approach. There were a significant effect of species (p<0.0001), fuel load (p<0.0001) and of the interaction year of burning *date of fire (p<0.0001) on the mean char height. A. quebracho-blanco had greater char height than S. lorentzii and Z. mistol (p<0.05), but differences between the latter two species were no significant. Diameter to breast height (DBH) was significant and positively correlated to char height for A. quebracho-blanco and Z. mistol. High fuel load produced higher char height than the low fuel load fires. A. quebracho-blanco had the greatest total, inner and outer bark thickness, and the lowest bark density among the studied species. It was followed by S. lorentzii, while Z. mistol had the lowest total bark thickness, the highest inner bark proportion and the highest bark density (p<0.05). The likelihood of complete mortality was significantly larger in Z. mistol than in A. quebracho-blanco and S. lorentzii. Mortality and top-kill were lower in the late season burns (p<0.05). Sprouting type was significantly affected by species (p<0.05), DBH, date of fire and by the interactions species×DBH and season of fire×DBH (p<0.0001). A. quebracho-blanco presented only basal resprouts, while the other two species showed both epicormic and basal resprouts. The two species with greater bark thickness had lower mortality than Z. mistol. Epicormic resprouts were not observed at the more severe late burns. The three species studied showed high resistance and tolerance to medium to high severity fires. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65904
Appears in Collections: 影响、适应和脆弱性
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作者单位: Facultad de Ciencias Forestales, Universidad Nacional de Santiago del Estero, Avenida Belgrano 1912 (S), 4200 Santiago del Estero, Argentina; Instituto Nacional de Tecnología Agropecuaria (INTA), EEA Santiago del Estero, Jujuy 850, 4200 Santiago del Estero, Argentina
Recommended Citation:
Bravo S.,Kunst C.,Leiva M.,et al. Response of hardwood tree regeneration to surface fires, western Chaco region, Argentina[J]. Forest Ecology and Management,2014-01-01,326