A generalized height-diameter model with random coefficients for uneven-aged stands in El Salto, Durango (Mexico)

Vargas-Larreta, Benedicto; Castedo‐Dorado, Fernando; González, Juan Gabriel Álvarez; Barrio-Anta, Marcos; Cruz-Cobos, Francisco

doi:10.1093/forestry/cpp016

Cited by 49 publications

(41 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The same results were obtained e.g. by Sharma and Parton (2007), who compared the generalized model and nonlinear mixed effects (NLME) model for more boreal tree species in Ontario as well as Vargas-Larreta et al (2009), who compared the NLME model and generalized model for different tree species in Durango, Mexico.…”

Section: Discussionsupporting

confidence: 65%

“…Height measurement, however, is expensive and time-consuming (Adame et al 2008). This duration can be reduced due to the use of distancemeasuring ultrasonic technology (Vargas-Larreta et al 2009), but is still higher than when measuring the diameter at breast height of a tree. Therefore the measured heights began to be replaced by fitted heights.…”

mentioning

confidence: 99%

“…Generalized models were dealt with e.g. by Wolf (1978), Zhang (2004), Castedo-Dorado et al (2005), Sharma and Parton (2007) and Vargas-Larreta et al (2009).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Comparison of linear mixed effects model and generalized model of the tree height-diameter relationship

Adamec¹

2015

J. For. Sci.

View full text Add to dashboard Cite

Models of height curves generated using a linear mixed effects model and generalized model were compared. Both tested models were also compared with local models of height curves, which were fitted using a nonlinear regression. In the mixed model two versions of calibration were tested. The first calibration approach was based on measurement of heights only in trees of the mean diameter interval, while the second calibration approach was based on measurement of tree heights in three diameter intervals. Generalized model is the mathematical formulation of a system of uniform height curves, which is commonly used in the Czech Republic. The study took place at Training Forest Enterprise called Masaryk Forest at Křtiny and was carried out for Norway spruce (Picea abies [L.] Karst.). It was found that the mixed model behaves correctly only in the case of calibration based on selection of trees in three diameter intervals. Selection of a total of nine trees was confirmed as the most suitable to calibrate the model. In most of the calculated quality criteria, the mixed model achieved better results than the generalized model, even with a smaller number of measured heights. The bias of both models from the local model was very similar (0.54 m for the mixed model and 0.44 m for the generalized model). The mixed model can therefore fully replace the commonly used generalized model even with a smaller number of measured heights.

show abstract

Section: Discussionsupporting

confidence: 65%

mentioning

confidence: 99%

See 1 more Smart Citation

Comparison of linear mixed effects model and generalized model of the tree height-diameter relationship

Adamec¹

2015

J. For. Sci.

View full text Add to dashboard Cite

show abstract

“…Further analysis indicates that fit statistics ( [13,20,24,[30][31][32][33]. Missanjo and Mwale [13] and Guangyi et al [20] reported that inclusion of random parameters in mixed-effects modelling approach increases predictive ability of the model.…”

Section: Mixed-effects Modelling Approach the Mixed-effects Model Fomentioning

confidence: 99%

Site Specific Stem Volume Models for Pinus patula and Pinus oocarpa

Malata

Ngulube

Missanjo³

2017

International Journal of Forestry Research

View full text Add to dashboard Cite

Sustainable management of timber forests requires availability and adequacy of models for accurate estimation of tree volumes. This study was conducted to develop site specific models for estimating individual total tree stem volume of Pinus patula and Pinus oocarpa at Chongoni Timber Plantation in Central Malawi. A total of 32 trees from Pinus patula compartment and 48 trees from Pinus oocarpa compartment were destructively sampled. Various predictors including diameter at breast height (dbh) and height (ht) were run against total stem volume using a nonlinear mixed-effects modelling approach. The results indicate that the developed site specific models showed a significant association between total stem volume and the predictors (dbh and ht). The developed volume models accounted for at least 99% of the total variation in the total stem volume data. This suggests that application of the developed site specific models is highly recommended when accurate results are required. The appropriateness of the developed models was also supported by the fact that the total relative errors (TRE) of these models were lower (range: −0.04% to 0.06%) than the TRE of some previously developed models (range: −12.40% to 41.70%) tested on the present data.

show abstract

“…Unlike measuring a diameter at breast height, which is easy and inexpensive, measuring height consumes considerable time and money (Adame et al 2008). Although the cost of the latter can be reduced due to the use of distance-measuring ultrasound and laser technology, height measurement is still a very labour-intense method (Vargas-Larreta et al 2009). Therefore fitted heights are often used instead of measured heights.…”

mentioning

confidence: 99%

Generalized additive models as an alternative approach to the modelling of the tree height-diameter relationship

Adamec¹,

Drápela²

2015

J. For. Sci.

View full text Add to dashboard Cite

Generalized additive models were tested using three types of smoothing functions as an alternative for modelling the height curve. The models were produced for 23 forest stands of Norway spruce (Picea abies [L.] Karst.) in the territory of the Training Forest Enterprise Masaryk Forest Křtiny. The results show that the best evaluated and recommended for practical use at the level of forest stand was the LOESS function (locally weighted scatterplot smooting) when using a greater width of the bandwidth. Due to the frequent overfitting and the associated unrealistic behaviour of the function, smoothing by spline functions cannot be recommended for modelling the height curve at the level of forest stand. It was validated that the resulting model must be assessed not only according to the calculated quality criteria, but also depending on the graphic pattern of the model which must ensure that the height curve pattern is realistic. The quality of the resulting models (with LOESS function) was assessed to be high, mainly due to the very precise determination of model heights.

show abstract

A generalized height-diameter model with random coefficients for uneven-aged stands in El Salto, Durango (Mexico)

Cited by 49 publications

References 33 publications

Comparison of linear mixed effects model and generalized model of the tree height-diameter relationship

Comparison of linear mixed effects model and generalized model of the tree height-diameter relationship

Site Specific Stem Volume Models for Pinus patula and Pinus oocarpa

Generalized additive models as an alternative approach to the modelling of the tree height-diameter relationship

Contact Info

Product

Resources

About