General above-stump volume and biomass functions for Pinus radiata, Eucalyptus globulus and Eucalyptus nitens

Gonzalez‐Benecke, Carlos A.; Fernández, Marcel; Albaugh, Timothy J.; Ahumada, Rodrigo; Bown, Horacio E.; Gayoso, Jorge; Gerding, Víctor; Mardones, Oscar; Rodriguez, Asier; Rubilar, Rafael

doi:10.1016/j.biombioe.2021.106280

Cited by 5 publications

(6 citation statements)

References 54 publications

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“…For example, Petráš and Pajtík (1991) used 2 m segments for developing volume equations, while Vallet et al (2006) used 1 m segments, the same segment length was used in this study. Some authors of volume equations do not use only easily measurable variables such as tree height and diameter at breast height, but also use tree or stand age, for example in the study by Gonzalez-Benecke et al (2021) of Monterey pine (Pinus radiata D. Don) in Chile. Gonzalez-Benecke et al (2014) state that the inclusion of other variables such as tree age, stand density or site index can improve the accuracy of the models.…”

Section: Discussionmentioning

confidence: 99%

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Development of Douglas fir merchantable stem volume model in the conditions of the Czech Republic

Hlavica,

Adamec

2023

J. For. Sci.

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A precise merchantable stem volume model of Douglas fir [Pseudotsuga menziesii (Mirb.) Franco] is missing in the Czech Republic. The aim of this study was to fit a new model through the reparametrization of volume equations (used in the Czech Republic or in other countries). We tested four volume equations (two from the Czech Republic, one from France and one from British Columbia) in the form of a nonlinear least squares model (NLS), weighted least squares model (WLS), and nonlinear mixed effects model (NLME). In all the tested models, the diameter at breast height of a tree and the total height of a tree were used as independent variables. Models were fitted on a dataset of 185 felled sample trees from eleven research areas with ages between 19-113 years. We have found that the model according to Omule et al. (1987) fits the merchantable stem volume as the best in the version of WLS model. Median value of the relative error of the final model was only -0.53%, which is less than the errors of models which are still used in the Czech Republic today.

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Section: Discussionmentioning

confidence: 99%

“…diameter at 7 m height or at 30% of tree height, height of the tree crown etc. ), or age, stand density or productivity of the stand (Pienaar et al 1987;Ďurský, Šmelko 2002;Gonzalez-Benecke et al 2021).…”

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confidence: 99%

Development of Douglas fir merchantable stem volume model in the conditions of the Czech Republic

Hlavica,

Adamec

2023

J. For. Sci.

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“…The dataset used in this study was previously reported by Gonzalez-Benecke et al [30] and consisted of two sources previously used to publish general biomass and volume functions in Chile [31,32] and unpublished data provided by the Chilean forestry company CMPC. The dataset consisted of 200 E. globulus, 119 E. nitens, and 316 P. radiata trees measured at 22 (E. globulus), 20 (E. nitens), and 55 (P. radiata) sites, respectively.…”

Section: Data Descriptionmentioning

confidence: 99%

“…CW was measured in two opposite directions and ground projected living crown area (CA, m 2 ) was calculated based on CW measurements assuming the shape as an ellipse. Further details on TASB determination can be found in Gonzalez-Benecke et al [30]. In addition to tree-level attributes, the dataset also contained several stand-level attributes, including the number of living trees per hectare (TPH, ha −1 ) and stand age (AGE, years) (Table 1).…”

Section: Data Descriptionmentioning

confidence: 99%

Using Tree Height, Crown Area and Stand-Level Parameters to Estimate Tree Diameter, Volume, and Biomass of Pinus radiata, Eucalyptus globulus and Eucalyptus nitens

Gonzalez‐Benecke

Fernández

Gayoso

et al. 2022

Forests

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Accurate estimates of tree diameter, height, volume, and biomass are important for numerous economic and ecological applications. In this study, we report exponential equations to predict tree DBH (cm), stem volume over bark (VOB, m3), and total above-stump biomass (TASB, kg) using three varying levels of input data for Pinus radiata D. Don, Eucalyptus globulus Labill., and Eucalyptus nitens (H.Deane & Maiden) Maiden planted trees. The three sets of input data included: (1) tree height (HT, m), (2) tree HT and ground projected living crown area (CA, m2), and (3) tree HT, CA, and additional stand parameters. The analysis was performed using a large dataset covering the range of distribution of the species in central Chile and included stands of varying ages and planting densities. The first set of equations using only HT were satisfactory with Adj-R2 values ranging from 0.78 to 0.98 across all species and variables. For all three species, estimation of DBH, VOB, and TASB as a function of HT improved when CA was added as an additional independent variable, increasing Adj-R2 and reducing RMSE. The inclusion of stand variables, such as age and stand density, also resulted in further improvement in model performance. The models reported in this study are a robust alternative for DBH, VOB, and TASB estimations on planted stands across a wide range of ages and densities, when height and CA are known, especially when input data are derived from remote sensing techniques.

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“…Apart from local studies for specific tree species, there are very few studies which address the development of biomass models for small trees from a broader perspective [21][22][23][24][25]. This may be due to the fact that these estimations are normally made in adult stands [26].…”

Section: Introductionmentioning

confidence: 99%

Species-Specific and Generalized Biomass Models for Estimating Carbon Stocks of Young Reforestations

Menéndez-Miguélez¹,

Calama²,

Rı́o³

et al. 2022

SSRN Journal

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General above-stump volume and biomass functions for Pinus radiata, Eucalyptus globulus and Eucalyptus nitens

Cited by 5 publications

References 54 publications

Development of Douglas fir merchantable stem volume model in the conditions of the Czech Republic

Development of Douglas fir merchantable stem volume model in the conditions of the Czech Republic

Using Tree Height, Crown Area and Stand-Level Parameters to Estimate Tree Diameter, Volume, and Biomass of Pinus radiata, Eucalyptus globulus and Eucalyptus nitens

Species-Specific and Generalized Biomass Models for Estimating Carbon Stocks of Young Reforestations

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