气候变化领域集成服务门户(CCPortal): The effect of the calculation method, plot size, and stand density on the top height estimation in natural spruce-fir-broadleaf mixed forests

CCPortal

DOI	10.1016/j.foreco.2019.117574
	The effect of the calculation method, plot size, and stand density on the top height estimation in natural spruce-fir-broadleaf mixed forests
	Zhou M.; Lei X.; Duan G.; Lu J.; Zhang H.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Stand dominant height or top height (TH) is a crucial variable for the measurement of potential site productivity, forest growth and yield projection, biomass estimation, structure stratification, and determination of development stages. There are variable definitions of TH, and it is affected by calculation method and stand characteristics. These issues have been examined for pure forests, but there is a knowledge gap on the estimation of TH for natural mixed forests with heterogenous and complex structure. We examined the effect of the calculation method, plot size, and stand density on the TH estimation in natural spruce-fir-broadleaf mixed forests in northeast China. The data were from 12 one-hectare plots with 10,195 height measurements. There were 14 calculation methods derived from the combination of four TH estimation methods (Conventional estimate; Adjusted largest trees; U-estimator, Sub-plot estimation) and four optional tree selection strategies with the consideration of tree species and tree size. Sample plots, with an area ranging from 0.01 ha to 0.50 ha with the interval of 0.01 ha, were randomly selected, and repeated 200 times with a bootstrapping method. In total there were 120,000 subplots generated from the 12 one-hectare plots. Results revealed that there was a strong correlation among the estimate methods, but the TH estimates were significantly different with the difference ranging from 0.02 m to 9.49 m. A threshold of plot size for stabilizing the TH estimate ranged from 0.05 ha to 0.1 ha. Stand density had complicated effects on TH estimations. The uncertainty for plot area and stand density was quantified. There were weak correlations between TH and stand volume, biomass and the periodic basal area increment, but moderate and high correlations with stand arithmetic and weighted mean height, respectively. We recommend the adjusted tallest trees method irrespective of tree species as the optimum for practical application for mixed forests. © 2019 Elsevier B.V.
英文关键词	Natural mixed forest; Plot size effect; Stand density effect; Stand top height; Uncertainty
语种	英语
scopus关键词	Ecology; Basal area increment; Forest growth and yield; Mixed forests; Size effects; Stand characteristics; Stand densities; Top height estimation; Uncertainty; Forestry; basal area; broad-leaved forest; estimation method; evergreen forest; forestry production; growth; height determination; methodology; mixed forest; stand structure; uncertainty analysis; Computation; Ecology; Estimation; Forestry; Forests; Height; Stand Density; Trees; Abies; Picea
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/155745
作者单位	Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Key Laboratory of Forest Management and Growth Modelling, State Forestry and Grassland Administration, Beijing, 100091, China; Xinyang Normal University, Xinyang, Henan 464000, China
推荐引用方式 GB/T 7714	Zhou M.,Lei X.,Duan G.,et al. The effect of the calculation method, plot size, and stand density on the top height estimation in natural spruce-fir-broadleaf mixed forests[J],2019,453.
APA	Zhou M.,Lei X.,Duan G.,Lu J.,&Zhang H..(2019).The effect of the calculation method, plot size, and stand density on the top height estimation in natural spruce-fir-broadleaf mixed forests.Forest Ecology and Management,453.
MLA	Zhou M.,et al."The effect of the calculation method, plot size, and stand density on the top height estimation in natural spruce-fir-broadleaf mixed forests".Forest Ecology and Management 453(2019).