A Procedure for Choosing Tree-Stem Volume Equations Previously Fitted in a Forest

Alvarado-Segura, Arturo A.; Sánchez, Francisco José Zamudio; Cruz, Karen Itzel De la Cruz-De la

doi:10.1080/10549811.2020.1711776

Cited by 2 publications

(4 citation statements)

References 18 publications

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“…The averages of the five β 1 values from our results are equivalent to 0.0000347 in the Dry Zone, and 0.0000321 in the Combined Intermediate and Humid Zone, differing by about 12.4% and 20.47% off the perfect paraboloid, respectively. Similar values for β 1 using the CV equation in fitting data from 150 P. patula trees were found by Alvarado-Segura et al [17] in Mexico. Therefore, tree shapes in our study approximate a paraboloid solid, which is described mathematically by the expression π/80,000 = 0.0000393 (diameters are in cm units).…”

Section: Discussionsupporting

confidence: 84%

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Evaluation of Different Modeling Approaches for Estimating Total Bole Volume of Hispaniolan Pine (Pinus occidentalis Swartz) in Different Ecological Zones

Bueno-López,

Caraballo-Rojas,

Torres-Herrera

2024

Forests

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Pinus occidentalis (Swartz) is the primary timber species in the Dominican Republic (DR). Despite its economic importance, studies conducted on this species are scarce, making it difficult to estimate current inventory levels. This study aims to enhance the accuracy of estimating the total bole volume of P. occidentalis in different ecological zones (EZs) within La Sierra, evaluating and comparing two established volume equations—combined variable (CV) and Schumacher and Hall (S&H) across nine modeling variants. An indicator variables analysis determined the necessity of distinct equations for two EZs. Fitting included both linear and nonlinear models. Our comprehensive statistical analysis included goodness-of-fit metrics to evaluate each model variant’s performance rigorously. The second modeling variant (SH02) for the SH equation was most effective in the Dry Ecological Zone, showing superior performance in both the fitting and validation phases. Similarly, the third modeling variant (SH03) for the SH equation emerged as the best fit for the Combined Intermediate and Humid Ecological Zones, achieving the lowest overall ranking sum among tested variants. SH02 and SH03 provide reliable and precise volume estimations, allowing for the optimization of forestry management practices for P. occidentalis trees. The SH models outperformed the CV model variants’ consistency in parameter estimation. This tailored approach ensures more accurate volume predictions, which is crucial for sustainable management and conservation efforts.

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Section: Discussionsupporting

confidence: 84%

“…Alvarado-Segura et al [17] used a nonlinear version of the SH model to estimate the stem volume of Pinus patula (Schl. et Cham.)…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Different Modeling Approaches for Estimating Total Bole Volume of Hispaniolan Pine (Pinus occidentalis Swartz) in Different Ecological Zones

Bueno-López,

Caraballo-Rojas,

Torres-Herrera

2024

Forests

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show abstract

“…The averages of the five values from our results are equivalent to 0.0000347 in the DEZ, and 0.0000321 in the CIHEZ, differing by about 12.4 % and 20.47% off the perfect paraboloid, respectively. Similar values for using the CV equation in fitting data from 150 P. patula trees were found by Alvarado-Segura et al [17] in Mexico. Therefore, tree shapes in our study approximate a paraboloid solid, which is described mathematically by the expression π/80000 = 0.0000393 (diameters are in cm units).…”

Section: Discussionsupporting

confidence: 83%

“…Alvarado-Segura et al [17] used a nonlinear version of the SH model to estimate the stem volume of Pinus patula Schiede ex Schlechtendal et Chamisso var. Patula, in Hidalgo, Mexico and reported an RMSE of 0.0914.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Different Modeling Approaches to Estimating Total Bole Volume for <em>Pinus occidentalis, </em>Swartz in Different Ecological Zones

Bueno-López,

Caraballo-Rojas,

Torres-Herrera

2024

Preprint

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Pinus occidentalis, Swartz is the primary timber species in the Dominican Republic (DR). Despite its economic importance, studies conducted on this species are very scarce, making it difficult to estimate current inventory levels. This study aims to enhance the accuracy of estimating total bole volume of P. occidentalis in different ecological zones (EZs) within La Sierra, evaluating and comparing two established volume equations—combined variable and Schumacher-Hall—across nine modeling variants (MVs). An indicator variables analysis determined the necessity of distinct equations for two EZs. Fitting included both linear and nonlinear models. Our comprehensive statistical analysis included goodness-of-fit metrics to evaluate each model variant's performance rigorously. Modeling variant SH02 was most effective in the Dry Ecological Zone, showing superior performance in both fitting and validation phases. Similarly, SH03 emerged as the best fit for the Combined Intermediate and Humid Ecological Zones, achieving the lowest overall ranking sum among tested variants. The SH equation variants SH02 and SH03, provide reliable and precise volume estimations, allowing optimization of forestry management practices for P. occidentalis trees. The SH models outperformed the CV model variants' consistency in parameter estimation. This tailored approach employed ensures more accurate volume predictions, which is crucial for sustainable management and conservation efforts.

show abstract

A Procedure for Choosing Tree-Stem Volume Equations Previously Fitted in a Forest

Cited by 2 publications

References 18 publications

Evaluation of Different Modeling Approaches for Estimating Total Bole Volume of Hispaniolan Pine (Pinus occidentalis Swartz) in Different Ecological Zones

Evaluation of Different Modeling Approaches for Estimating Total Bole Volume of Hispaniolan Pine (Pinus occidentalis Swartz) in Different Ecological Zones

Evaluation of Different Modeling Approaches to Estimating Total Bole Volume for <em>Pinus occidentalis, </em>Swartz in Different Ecological Zones

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