气候变化领域集成服务门户(CCPortal): Taxon-specific modeling systems for improving reliability of tree aboveground biomass and its components estimates in tropical dry dipterocarp forests

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DOI	10.1016/j.foreco.2019.01.038
	Taxon-specific modeling systems for improving reliability of tree aboveground biomass and its components estimates in tropical dry dipterocarp forests
	Huy B.; Tinh N.T.; Poudel K.P.; Frank B.M.; Temesgen H.
发表日期	2019
ISSN	0378-1127
起始页码	156
结束页码	174
卷号	437
英文摘要	The dry dipterocarp forest (DDF) is a major and unique forest type in Asia providing both protection and production functions. DDF's role as a carbon sink is important in Asia, but there is a deficiency in existing biomass models for these forests. This study aimed to develop simultaneous modeling systems to estimate tree above-ground biomass (AGB) and its components for mixed species, dominant family, genera, and species. Twenty-eight 0.25 ha plots in the Central highlands and one 1 ha plot in the Southeast ecoregion in Viet Nam were measured. A total of 329 trees were destructively sampled to obtain a dataset of the dry biomass of the stem (Bst), branches (Bbr), leaves (Ble), bark (Bba), and AGB. Using K-fold cross validation, we compared AGB predictions from independently developed AGB equation and from a system of biomass equations that estimated component biomass and AGB simultaneously. The estimation methods for independent equation was weighted nonlinear regression fit by maximum likelihood and for simultaneous system it was weighted nonlinear seemingly unrelated regression (SUR) fit by generalized least squares. We also examined different modeling systems for different plant classification at taxonomic levels. The selected form of taxon-specific modeling systems were AGB = a 1 × D b11 × H b12 × WD b13 + a 2 × D b21 + a 3 × D b31 + a 4 × D b41 for mixed species and dominant Dipterocarpaceae family and AGB = a 1 × D b11 + a 2 × D b21 + a 3 × D b31 + a 4 × D b41 for dominant genera of Dipterocarpus and Shorea. The predictors of D, H, and WD are diameter at breast height, tree height and wood density, respectively. Compared to the mixed species modeling system, genus-specific modeling systems improved the reliability of AGB estimation substantially and will reduce the cost of application because the only predictor required for measurement is D. The pantropical genus-specific modeling systems are more reliable than pantropical mixed species models. © 2019 Elsevier B.V.
英文关键词	Biomass; Carbon; Dipterocarpus genus; Genus-specific model; Seemingly unrelated regression (SUR); Shorea genus
语种	英语
scopus关键词	Biomass; Carbon; Least squares approximations; Maximum likelihood estimation; Nonlinear equations; Plants (botany); Regression analysis; Tropics; Diameter-at-breast heights; Dipterocarpus; Dry dipterocarp forest; Generalized least square; K fold cross validations; Non-linear regression; Seemingly unrelated regression; Shorea genus; Forestry; aboveground biomass; biological production; density dependence; ecological modeling; forest ecosystem; individual-based model; regression analysis; taxonomy; tree; tropical region; upland region; Biomass; Carbon; Dipterocarpus; Forestry; Regression Analysis; Tropics; Viet Nam; Dipterocarpaceae; Dipterocarpus; Shorea
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/156154
作者单位	Department of Forest Resources and Environment Management, Tay Nguyen University (TNU), 567 Le Duan, Buon Ma Thuot, Dak Lak, Viet Nam; Visiting Scholar of Department of Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR 97333, United States; Department of Forestry, Mississippi State University, PO Box 9681MS 39762, United States; Department of Forest Engineering, Resources and Management, Oregon State University (OSU), Corvallis, OR 97333, United States
推荐引用方式 GB/T 7714	Huy B.,Tinh N.T.,Poudel K.P.,et al. Taxon-specific modeling systems for improving reliability of tree aboveground biomass and its components estimates in tropical dry dipterocarp forests[J],2019,437.
APA	Huy B.,Tinh N.T.,Poudel K.P.,Frank B.M.,&Temesgen H..(2019).Taxon-specific modeling systems for improving reliability of tree aboveground biomass and its components estimates in tropical dry dipterocarp forests.Forest Ecology and Management,437.
MLA	Huy B.,et al."Taxon-specific modeling systems for improving reliability of tree aboveground biomass and its components estimates in tropical dry dipterocarp forests".Forest Ecology and Management 437(2019).