气候变化领域集成服务门户(CCPortal): Allometric equations for Sequoia sempervirens in forests of different ages

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DOI	10.1016/j.foreco.2018.11.016
	Allometric equations for Sequoia sempervirens in forests of different ages
	Sillett S.C.; Van Pelt R.; Carroll A.L.; Campbell-Spickler J.; Coonen E.J.; Iberle B.
发表日期	2019
ISSN	0378-1127
起始页码	349
结束页码	363
卷号	433
英文摘要	Mature second-growth forests dominated by Sequoia sempervirens occupy only two percent of the species’ current distribution yet represent an important benchmark for restoration management. Here we develop new allometric equations for these forests based on 44 trees 23–84 m tall, which can be used to estimate leaf, bark, cambium, sapwood, and heartwood quantities, including biomass and carbon content, from ground-based measurements of trunk diameter, height, and crown size. New equations complement those already available for S. sempervirens in young and old-growth forests and should be applied judiciously. We use fixed area plots in a 159-year-old second-growth forest (0.5 ha) and a primary forest with trees >1100 years old (1.0 ha) to compare three sets of equations. Whereas equations from young forests underestimate biomass in older forests, new equations underestimate trunk and overestimate branch quantities in the old-growth forest, and equations from old-growth forests do the opposite in the mature second-growth forest. Despite the great age difference, canopy structure of these low-elevation, alluvial forests is similar with S. sempervirens stratified into dominant and subordinate crown classes towering above a diminutive understory. Dendrochronological reconstruction of heights and wood radii for nine individuals reveal that both forests have trees producing >300 kg yr−1 with tall trees in the old-growth forest producing up to 800 kg yr−1 in recent decades. Sequoia sempervirens represents nearly 100% of biomass and 83 to –92% of leaf area in the second-growth (total LAI = 15.0) and old-growth (total LAI = 19.3) forests, respectively. The best allometric equations estimate that the second-growth forest holds 1667 Mg ha−1 of aboveground biomass (837 Mg C ha−1), 56% of which is heartwood, whereas the old-growth forest holds 4595 Mg ha−1 of aboveground biomass (2332 Mg C ha−1), 76% of which is heartwood. Restoration management has potential to harness the carbon sequestration potential of S. sempervirens by promoting heartwood accumulation through silviculture. © 2018 The Authors
英文关键词	Aboveground biomass; Forest canopy structure; Fritz Wonder Plot; Tree age; Tree size
语种	英语
scopus关键词	Biomass; Carbon; Conservation; Ecology; Plants (botany); Restoration; Wood products; Above ground biomass; Forest canopy structure; Fritz Wonder Plot; Tree age; Tree size; Forestry; aboveground biomass; age; allometry; canopy architecture; carbon sequestration; dendrochronology; equation; evergreen tree; forest canopy; leaf area index; numerical method; old-growth forest; size; tree; Biomass; Carbon; Conservation; Ecology; Restoration; Wood Products; Sequoia sempervirens
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/156274
作者单位	Department of Forestry and Wildland Resources, Humboldt State University, Arcata, CA 95521, United States; School of Environmental and Forest Science, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Sillett S.C.,Van Pelt R.,Carroll A.L.,et al. Allometric equations for Sequoia sempervirens in forests of different ages[J],2019,433.
APA	Sillett S.C.,Van Pelt R.,Carroll A.L.,Campbell-Spickler J.,Coonen E.J.,&Iberle B..(2019).Allometric equations for Sequoia sempervirens in forests of different ages.Forest Ecology and Management,433.
MLA	Sillett S.C.,et al."Allometric equations for Sequoia sempervirens in forests of different ages".Forest Ecology and Management 433(2019).