气候变化领域集成服务门户(CCPortal): Fire as a driver of wood mechanical traits in the boreal forest

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DOI	10.1016/j.foreco.2020.118460
	Fire as a driver of wood mechanical traits in the boreal forest
	Waldron K.; Auty D.; Tong T.; Ward C.; Pothier D.; Torquato L.P.; Achim A.
发表日期	2020
ISSN	0378-1127
卷号	476
英文摘要	In boreal forests where the fire return interval is long, the high structural variability of stands may affect wood traits. Here, we build on earlier work that revealed a difference in wood mechanical traits of black spruce between regular (regenerated from fire in the last 200 years) and irregular (undisturbed by fire for at least 200 years) stands. This study aimed to identify the ecological drivers of this variation in wood traits. To do so, we first sought to corroborate existing results on the effects of stand structure induced by the time since the last stand-replacing fire (TSLF) on wood mechanical stiffness in the eastern boreal forest of Canada. Results confirmed that black spruce from regular stands tend to produce wood with higher modulus of elasticity (MOE) than those from irregular stands. For both regular and irregular stands, we compared a set of linear models that were defined a priori to determine the structural and site productivity variables having the largest influence on MOE. The ‘growth efficiency index’ (aboveground woody biomass production per unit leaf area) was the best predictor of MOE variation among regular stands. For irregular stands, the model with TSLF as the sole explanatory variable was a better predictor of MOE than any other candidate model. However, we did not find strong evidence of a direct relationship between TSLF and wood traits, since our best models explained a relatively small proportion of the variance. Our results suggest that differences in wood traits could be attributable to the seed or layer origin of the trees and/or to the length of time trees remain in the understory. We propose that intensive wood production strategies focus on stands of the first post-fire cohort. © 2020 Elsevier B.V.
英文关键词	Black spruce; Forest productivity; Old-growth; Post-fire chronosequence; Stand structure; Wood stiffness; Wood traits
语种	英语
scopus关键词	Ecology; Fires; Reforestation; Above-ground woody biomass; Explanatory variables; Fire return intervals; Growth efficiency; Mechanical stiffness; Site productivity; Stand-replacing fires; Structural variability; Wood; biomass; boreal forest; forest fire; mechanical property; numerical model; stiffness; understory; Ecology; Fires; Picea Mariana; Production; Reforestation; Trees; Wood; Canada; Picea mariana
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155007
作者单位	Faculté de foresterie, de géographie et de géomatique, Département des sciences du bois et de la forêt, Pavillon Abitibi-Price, Université Laval, 2405 rue de la Terrasse, Québec, QC G1V 0A6, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 rue du P.E.P.S., P.O. Box 10380, Stn. Sainte-Foy, Québec, QC G1V 4C7, Canada; Northern Arizona University, School of Forestry, 200 E. Pine Knoll Dr., Flagstaff, AZ 86005, United States; FPInnovations, 2665 East Mall, Vancouver, BC V6T 1Z4, Canada; Direction de la recherche forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, 2700 rue Einstein, Québec, QC G1P 3W8, Canada
推荐引用方式 GB/T 7714	Waldron K.,Auty D.,Tong T.,et al. Fire as a driver of wood mechanical traits in the boreal forest[J],2020,476.
APA	Waldron K..,Auty D..,Tong T..,Ward C..,Pothier D..,...&Achim A..(2020).Fire as a driver of wood mechanical traits in the boreal forest.Forest Ecology and Management,476.
MLA	Waldron K.,et al."Fire as a driver of wood mechanical traits in the boreal forest".Forest Ecology and Management 476(2020).