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Open AccessArticle

Evaluation of Stand Biomass Estimation Methods for Major Forest Types in the Eastern Da Xing’an Mountains, Northeast China

1
Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, Heilongjiang, China
2
Department of Forest and Natural Resources Management, State University of New York College of Environmental Science and Forestry (SUNY-ESF), One Forestry Drive, Syracuse, NY 13210, USA
*
Author to whom correspondence should be addressed.
Forests 2019, 10(9), 715; https://doi.org/10.3390/f10090715
Received: 4 July 2019 / Revised: 7 August 2019 / Accepted: 19 August 2019 / Published: 21 August 2019
(This article belongs to the Section Forest Ecology and Management)
Currently, forest biomass estimation methods at the regional scale have attracted the greatest attention from researchers, and the development of stand biomass models has become popular a trend. In this study, a total of 5074 measurements on 1053 permanent sample plots were obtained in the Eastern Da Xing’an Mountains, and three additive systems of stand biomass equations were developed. The first additive system (M-1) used stand variables as the predictors (i.e., stand basal area and average height), the second additive system (M-2) utilized stand volume as the sole predictor, and the third additive system (M-3) included both stand volume and biomass expansion and conversion factors (BCEFs) as the predictors. The coefficients of the three model systems were estimated with nonlinear seemingly unrelated regression (NSUR), while the heteroscedasticity of the model residuals was solved with the weight function. The jackknifing technique was used on the residuals, and several statistics were used to assess the prediction performance of each model. We comprehensively evaluated four stand biomass estimation methods (i.e., M-1, M-2, M-3 and a constant BCEF (M-4)). Here, we showed that the (1) three additive systems of stand biomass equations showed good model fitting and prediction performance, (2) M-3 significantly improved the model fitting and performance and provided the most accurate predictions for most stand biomass components, and (3) the ranking of the four stand biomass estimation methods followed the order of M-3 > M-2 > M-4 > M-1. Our results demonstrated these additive stand biomass models could be used to estimate the stand aboveground and belowground biomass for the major forest types in the Eastern Da Xing’an Mountains, although the most appropriate method depends on the available data and forest type. View Full-Text
Keywords: forest inventory; stand biomass; additive equations; nonlinear seemingly unrelated regression forest inventory; stand biomass; additive equations; nonlinear seemingly unrelated regression
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MDPI and ACS Style

Dong, L.; Zhang, L.; Li, F. Evaluation of Stand Biomass Estimation Methods for Major Forest Types in the Eastern Da Xing’an Mountains, Northeast China. Forests 2019, 10, 715. https://doi.org/10.3390/f10090715

AMA Style

Dong L, Zhang L, Li F. Evaluation of Stand Biomass Estimation Methods for Major Forest Types in the Eastern Da Xing’an Mountains, Northeast China. Forests. 2019; 10(9):715. https://doi.org/10.3390/f10090715

Chicago/Turabian Style

Dong, Lihu; Zhang, Lianjun; Li, Fengri. 2019. "Evaluation of Stand Biomass Estimation Methods for Major Forest Types in the Eastern Da Xing’an Mountains, Northeast China" Forests 10, no. 9: 715. https://doi.org/10.3390/f10090715

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