Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.08.043 |
Fire behavior in Pinus halepensis thickets: Effects of thinning and woody debris decomposition in two rainfall scenarios | |
Palmero-Iniesta, Marina1; Domenech, Rut2; Molina-Terren, Domingo3; Maria Espelta, Josep1 | |
2017-11-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 404 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | Thinning is recommended in overstocked thickets to improve forest structure and reduce high-intensity stand replacing fires. Many studies have outlined the benefits of thinning for forest growth and reproduction but effectiveness in fire intensity needs more attention. Moreover, the effect that slash generated by thinning may have on fire behavior has been seldom explored. Here we simulated fire behavior on unthinned and thinned Aleppo pine (Pinus halepensis) thickets in Catalonia (Northeast Spain) where woody residues were left in situ. Furthermore, we simulated fire behavior one year later considering the reduction in the dead fuel load, using decomposition rates empirically determined under high and low rainfall. We could also assess the accuracy of our simulations by measuring fire severity on trees in the same study area after a real wildfire. Simulations predicted that thinning prevents the occurrence of active crown fires and reduces mean flame length (from 6.2 +/- 0.8 to 1.5 +/- 0.2 m), the rate of fire spread (from 5.4 +/- 0.9 to 0.9 +/- 0.1 m min(-1)) and the fireline intensity (from 3631 +/- 686 to 446 +/- 70 kW m(-1)) compared to unthinned thickets. In the thinned stands these parameters further decrease one year later owing to the decomposition of woody residues. Decomposition of woody residues was observed to be faster under a high rainfall scenario leading to a reduction in simulated flame length and fire intensity twice as fast as under low rainfall. In accordance with the lack of active crown fires and the lower flame length predicted for thinned thickets, fire severity observed after a real wildfire in the study area was lower in thinned than in unthinned stands (respectively, 2.02 +/- 0.13 vs. 2.93 +/- 0.15 in a scale of 0-4). The agreement between simulations that predicted a reduction in fire intensity in thinned thickets and the lower fire damage (fire severity) observed confirms the benefits of thinning young P. halepensis thickets to reduce fire effects. Moreover, our results indicate that leaving woody residues in situ after the thinning of these young thickets does not increase fire intensity. Yet, the influence of precipitation on the decomposition of woody residues highlights the uncertainties that an increase in drought in Mediterranean-type climates may have in the behavior of future fire events. |
英文关键词 | Crown fire Drought Fire severity Fuel load Thinning Wood decomposition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413384000022 |
WOS关键词 | SILVICULTURAL TREATMENTS ; POSTFIRE REGENERATION ; CONE PRODUCTION ; CLIMATE-CHANGE ; CROWN FIRES ; FORESTS ; WILDFIRE ; MANAGEMENT ; SEVERITY ; SURFACE |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23132 |
专题 | 气候变化 |
作者单位 | 1.CREAF Cerdanyola Valles, Catalonia 08193, Spain; 2.Forest Sci Ctr Catalonia CTFC, Km 2, Solsona 25280, Spain; 3.Univ Lleida, Sch Agrifood & Forestry Sci & Engn, E-25198 Lleida, Spain |
推荐引用方式 GB/T 7714 | Palmero-Iniesta, Marina,Domenech, Rut,Molina-Terren, Domingo,et al. Fire behavior in Pinus halepensis thickets: Effects of thinning and woody debris decomposition in two rainfall scenarios[J]. FOREST ECOLOGY AND MANAGEMENT,2017,404. |
APA | Palmero-Iniesta, Marina,Domenech, Rut,Molina-Terren, Domingo,&Maria Espelta, Josep.(2017).Fire behavior in Pinus halepensis thickets: Effects of thinning and woody debris decomposition in two rainfall scenarios.FOREST ECOLOGY AND MANAGEMENT,404. |
MLA | Palmero-Iniesta, Marina,et al."Fire behavior in Pinus halepensis thickets: Effects of thinning and woody debris decomposition in two rainfall scenarios".FOREST ECOLOGY AND MANAGEMENT 404(2017). |
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