Mixed effect models for predicting breast height diameter from stump diameter of Oriental beech in Göldağ

Ercanlı, İlker; Günlü, Alkan; Başkent, Emin Zeki

doi:10.1590/0103-9016-2014-0225

Cited by 11 publications

(9 citation statements)

References 21 publications

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“…The establishment of permanent plots can also assist inspection agencies in cases of wood being illegally removed, in addition to helping understand the regrowth. This is because a relationship can be obtained with neighboring areas of similar composition and forest structure (ERCANLI et al, 2015;PETER;CONSTANCE, 2010) due to the diameter of the stumps left in the field for elaborating mathematical models to estimate the biomass that was extracted in an acceptable manner, thereby helping the agents to prepare infraction notices.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stump regrowth and estimation of reconstituting Caatinga shrub-tree biomass under forest management

Lima¹,

Ferreira²,

Silva³

et al. 2018

Sci. For.

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ResumoObjetivou-se avaliar a rebrota e reconstituir a biomassa arbustiva-arbórea a partir das cepas em uma área de Caatinga sob manejo florestal em Floresta-PE, Brasil. Dois anos após intervenção em 18 parcelas foram medidas as circunferências e alturas das cepas e dos perfilhos. Foi avaliada a influência do diâmetro e da altura da cepa na brotação das espécies. Em uma área próxima e sem intervenção, foram tomados dados de diâmetro a altura da base e do peito para reconstituição da biomassa explorada. Verificou-se que Poincianella bracteosa e Aspidosperma pyrifolium emitiram maior número de perfilhos nas cepas com circunferência maior que 30 cm, mas sem influência da altura da cepa. A biomassa média estimada (17186,16 kg ha -1 ) foi similar a áreas submetidas à intervenção antrópica e a sua reconstituição pode ser uma ferramenta auxiliar na para órgãos ambientais na fiscalização de desmatamento ilegal. Palavras-chave: corte raso, regeneração natural, semiárido AbstractThis study aimed to evaluate stump regrowth and estimate the reconstitution of shrub-tree biomass from the stumps in an area of Caatinga under forest management in Floresta-PE, Brazil. The circumferences and heights of the stump and sprouts were measured two years after an intervention on 18 plots. The influence of the stump diameter and its height on the sprouting ability of the species was evaluated. Data was taken in the next area without intervention in order to estimate the diameter at breast height for reconstitution of the exploited biomass. We found that the tillering for Poincianella bracteosa and Aspidosperma pyrifolium was influenced by the size of the circumference, but not by the stump height. The average estimated biomass (17186.16 kg ha -1 ) was similar to other areas also subject to human intervention, and its reconstitution can be an auxiliary tool for monitoring illegal deforestation by environmental agencies.

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Section: Introductionmentioning

confidence: 99%

“…Therefore, indirect methods that reliably estimate tree biomass are preferred. Statistical models have been developed for this and used to estimate woody biomass left standing and/or from the diameter of the remaining stock (ERCANLI et al, 2015;NASCIMENTO et al, 2010;ÖZÇELÍK et al,2010;SAMPAIO et al, 2010;SILVA;THORPE et al,2010).…”

Section: Introductionmentioning

confidence: 99%

Stump regrowth and estimation of reconstituting Caatinga shrub-tree biomass under forest management

Lima¹,

Ferreira²,

Silva³

et al. 2018

Sci. For.

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“…Thus, it was possible to calculate random parameters according to the expression proposed by the Bayesian estimator (Vonesh and Chinchilli, 1997;Sharma and Parton, 2007). As suggested, these sample alternatives for the calibration responses included the selection of trees based on specific categories of stand size (Calama and Montero, 2004;Yang et al, 2009;Gómez-García et al, 2015;Ercanli et al, 2015).…”

Section: Cernementioning

confidence: 99%

“…According to Dorado and Diéguez-Aranda (2006), modelling allows to adjust equations that estimate height according to diameter, including other variables such as age, site index or dominant height, improving the quality of adjustments of height curves. Costa et al (2016) outline that the use of classic regression models requires meeting key assumptions such as independence among observations and homogeneity of variance, which are not always achieved, thus indicating explicit modelling of the covariance structure and the use of mixed models, what allows to generalize structures of spatial-temporal correlations and non-constant variance (Adame et al, 2008;Yang and Huang, 2009;Ercanli et al, 2015). Mixed models are one of the most sophisticated regression techniques with adjustment of a more consistent model, allowing to better verify model variability (Pinheiro and Bates, 2000;Trincado et al 2007;Bueno-López and Bevilacqua, 2012).…”

Section: Introductionmentioning

confidence: 99%

HEIGHT-DIAMETER RELATIONSHIPS FOR Eucalyptus grandis HILL EX. MAIDEN IN MOZAMBIQUE: USING MIXED-EFFECTS MODELING APPROACH

Hofiço

Costa

Finger

et al. 2020

CERNE

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HIGHLIGHTS Height-diameter model using mixed-effects was developed for Eucalyptus grandis in Mozambique. Four dominant trees and one tree randomly selected in plot were sufficient to calibrate the model. The perspective is to increase accuracy, practicality, precision of height estimations and decrease of sampling effort in forest inventories in Mozambique ABSTRACT Equations express that height-diameter relationships are used to estimate tree heights that were not measured in the plots, as well as to calculate their volumes. In this study, we modelled height for Eucalyptus grandis Hill ex. Maiden stands using nonlinear mixed effect models in Mocuba District, Central Mozambique. Models were tested from 1414 trees measured, in 40 plots with dimensions of 20 x 20 m. Model one (M1) was the best in relation to the others according to the evaluated criteria (R 2 = 0.9183; RMSE = 0.558; AIC =-1234.8; BIC =-1224.9). The inclusion of the variables dominant height (h 100 , m), basal area (G, m 2. ha-1) and mean basal area diameter (dg, m) in model 1 (M1) within the scope of mixed effect model structures that involved both fixed and random effect parameters (Model 7) provides better fitting and more precise predictions. For calibration of random effects according to plot, height measurement of at least five trees is required (four dominant trees + one tree randomly selected in plot). Our model is site-specific and its application should therefore be limited to the stands with characteristics that were the basis of this study. Further works on recalibration, validation, and verification of our model using a larger dataset collected from a wider range of species distribution will be more interesting.

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“…Wharton's (1984) model explained slightly lower percentage (93%) of the total dbh variance for beech. Conversely, Ercanli et al (2015) used mixed effect models for predicting dbh from the stump diameter of Oriental beech with a coefficient of determination of 0.99. Thorpe et al (2010) developed a linear model for black spruce explaining 97% of the total dbh variance.…”

Section: Diameter-stump Modelsmentioning

confidence: 99%

Reconstructing past forest status using inventory and tree ring data to support uneven-aged forest management

Kulla

Bošeľa

Murgaš

et al. 2017

Central European Forestry Journal

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The decision to change forest management system from the traditional even-aged to the selection one based on statistical inventory is often limited by a missing previous inventory. To avoid this issue, we used available forest inventory data from ca 2 000 ha of mixed uneven-aged beech-fir-spruce-pine forest and tree ring data from 831 trees to reconstruct forest status from one decade ago. For this purpose, we have created three sets of species-specific models: 1) diameter-stump models to reconstruct the diameter of missing trees, 2) diameter-increment models based on tree ring data to estimate past diameters, and 3) height-diameter models to estimate past tree heights. This approach has allowed us to completely reconstruct the state of the forest as it was ten years ago and use the results as a substitution for a previously missing inventory.

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Mixed effect models for predicting breast height diameter from stump diameter of Oriental beech in Göldağ

Cited by 11 publications

References 21 publications

Stump regrowth and estimation of reconstituting Caatinga shrub-tree biomass under forest management

Stump regrowth and estimation of reconstituting Caatinga shrub-tree biomass under forest management

HEIGHT-DIAMETER RELATIONSHIPS FOR Eucalyptus grandis HILL EX. MAIDEN IN MOZAMBIQUE: USING MIXED-EFFECTS MODELING APPROACH

Reconstructing past forest status using inventory and tree ring data to support uneven-aged forest management

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