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DOI	10.1016/j.foreco.2019.117583
	Development of a generic model describing modulus of elasticity of Pinus radiata in Chile and New Zealand
	Watt M.S.; Trincado G.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Using three national datasets collected across Chile and New Zealand we developed a model of Modulus of Elasticity (E) for Pinus radiata D. Don to ascertain whether predictions can be generalised across countries. Data used within the model covered a wide range in E (3.1–19.0 GPa) and tree age (6–25 years). The temperature range of 8.2–15.9 °C and rainfall range of 636–3276 mm covered the variation present within plantations in both countries. A range of models were tested that varied in complexity with the simplest including only the tree dimensions (diameter (DBH), height (H) and stem slenderness (S)), to tree dimensions and stand age, and finally, for the most complex models, all of these variables as well as climatic data and stand density. Modelling approaches included general linear models, and for the models with more variables, elastic net, partial least squares and sparse partial least squares. Analyses show S to be a more precise predictor of E than either H or DBH. The most precise model of E, which had R2 of 0.82 and RMSE of 1.57 GPa, included stand age, S, air temperature and rainfall as significant predictors. This model was constructed using a linear modelling approach and predictions using more sophisticated methods were not significantly more precise. Predictions were applicable across both Chile and New Zealand as evidenced by the lack of bias, with respect to country level datasets, in the final model. © 2019 Elsevier B.V.
英文关键词	Climate; Modulus of elasticity; Stem slenderness; Stiffness; Velocity
语种	英语
scopus关键词	Forecasting; Forestry; Least squares approximations; Rain; Stiffness; Velocity; Air temperature; Climate; General linear models; Generic modeling; Partial least square (PLS); Precise modeling; Sparse partial least squares; Temperature range; Elastic moduli; air temperature; climate change; coniferous tree; elastic modulus; numerical model; stem; stiffness; velocity structure; Age; Forecasts; Forestry; Models; Rain; Stiffness; Tree Dimensions; Velocity; Chile; New Zealand; Pinus radiata
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/155733
作者单位	Scion, PO Box 29237, Fendalton, Christchurch, New Zealand; Instituto de Bosques y Sociedad, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Box 567, Valdivia, Chile
推荐引用方式 GB/T 7714	Watt M.S.,Trincado G.. Development of a generic model describing modulus of elasticity of Pinus radiata in Chile and New Zealand[J],2019,453.
APA	Watt M.S.,&Trincado G..(2019).Development of a generic model describing modulus of elasticity of Pinus radiata in Chile and New Zealand.Forest Ecology and Management,453.
MLA	Watt M.S.,et al."Development of a generic model describing modulus of elasticity of Pinus radiata in Chile and New Zealand".Forest Ecology and Management 453(2019).