Journal Club
En esta sección se listan los árticulos revisados en el “Journal Club” semanal. En esta dinámica, el equipo completo del laboratorio lee un artículo propuesto por un encargado y ese encargado realiza un review para discutir.
Cross-validation of non-linear growth functions for modelling tree height-diameter relationships
Item Type Journal Article Author L. Zhang Date 1997 Volume 79 Pages 251-257 Publication Annals of Botany Issue 3 Date Added 11/30/2023, 4:29:29 PM Modified 11/30/2023, 4:29:29 PM Notes:
Revisado por Rocío Reinoso
Attachments
Diameter, Height, Crown, and Age Relationship in Eight Neotropical Tree Species
Item Type Journal Article Author Sean T. O'Brien Author Stephen P. Hubbell Author Peter Spiro Author R. Condit Author Robin B. Foster Date 1995 Volume 76 Pages 1926–1939 Publication Ecology Issue 6 Date Added 11/30/2023, 4:29:40 PM Modified 11/30/2023, 4:29:40 PM Notes:
Revisado por Rocío Reinoso
Attachments
Size-dependent Allometry of Tree Height, Diameter and Trunk-taper
Item Type Journal Article Author K. Niklas Date 1995 Volume 75 Pages 217–227 Publication Annals of Botany Date Added 11/30/2023, 4:29:35 PM Modified 11/30/2023, 4:29:35 PM Notes:
Revisado por Rocío Reinoso
Attachments
Modelos fustales para renovales de roble, raulí y coigüe en Chile
Item Type Journal Article Author Salvador A. Gezan Author Paulo C. Moreno M Author Alicia Ortega Date 00/2009 Library Catalog SciELO URL http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-92002009000200001&lng=es&nrm=iso&tlng=en Accessed 4/18/2024, 7:40:42 AM Extra Publisher: Universidad Austral de Chile Volume 30 Pages 61-69 Publication Bosque (Valdivia) DOI 10.4067/S0717-92002009000200001 Issue 2 ISSN 0717-9200 Date Added 4/18/2024, 7:40:42 AM Modified 6/13/2024, 1:09:21 PM Tags:
Notes:
Revisado por Christian Salas. Se acepta.
Attachments
Effects of adding tree, stand, and site variables to Kozak's variable-exponent taper equation
Item Type Journal Article Author Charles K. Muhairwe Author Valerie M. LeMay Author Antal Kozak Abstract Crown class, site class, and breast-height age were incorporated into Kozak's variable-exponent taper equation (A. Kozak. 1988. Can. J. For. Res. 18: 1363–1368) for three species: Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco), western red cedar (Thujaplicata Donn), and aspen (Populustremuloides Michx.). For lodgepole pine (Pinuscontorta Dougl.), crown ratio, breast-height age, and quadratic mean diameter were incorporated into Kozak's taper equation. The effects of adding these variables to the exponent part of the taper equation on the prediction abilities of the taper model were assessed for prediction of diameter inside bark along the stem, total tree volume, and tree merchantable height. It was found that apart from the use of crown ratio for lodgepole pine, the additional variables resulted in only marginal improvements to the published version of Kozak's taper function. Therefore, the cost of measuring these additional variables is not justifiable. Date 1994-02 Library Catalog cdnsciencepub.com (Atypon) URL https://cdnsciencepub.com/doi/10.1139/x94-037 Accessed 4/21/2024, 3:08:54 PM Extra Publisher: NRC Research Press Volume 24 Pages 252-259 Publication Canadian Journal of Forest Research DOI 10.1139/x94-037 Issue 2 Journal Abbr Can. J. For. Res. ISSN 0045-5067 Date Added 4/21/2024, 3:08:54 PM Modified 4/21/2024, 3:08:54 PM Notes:
Revisado por Nicolás Campos
Attachments
Incorporating crown ratio into taper equations for Loblolly Pine trees
Item Type Journal Article Author Harold Burkhart Author Sally Burton Date 1985 Volume 31 Pages 478 - 484 Publication Forest Sci. Issue 2 Date Added 4/28/2024, 10:01:42 AM Modified 4/28/2024, 10:03:58 AM Notes:
Revisado por Nicolás Campos
Attachments
Dynamic modelling of tree form
Item Type Journal Article Author Oscar García Abstract [Software: https://cran.r-project.org/package=dyntaper] Tree profile or taper models are an important component of decision support systems for forest management. An extensive body of theory and observations on the mechanisms of tree form development has accumulated over the last 150 years. Quantitative mensurational models, however, have made little use of that information. Taper models remain largely empirical and static, describing tree dimensions and shape at one point in time. Here taper equations are derived from simplified models of radial stem growth consistent with physiological knowledge. It is expected that this approach may improve accuracy, especially when stands are subjected to varied density management alternatives. Date 2015-01-01 Library Catalog ResearchGate Volume 7 Pages 9-15 Publication Mathematical and Computational Forestry and Natural-Resource Sciences Journal Abbr Mathematical and Computational Forestry and Natural-Resource Sciences Date Added 5/28/2024, 12:34:26 PM Modified 5/28/2024, 12:34:26 PM Notes:
Revisado por Nicolás Campos
Attachments
Modelo de ahusamiento para Eucalyptus nitens, en suelos de cenizas volcánicas de la región de La Araucanía (Chile)
Item Type Journal Article Author J Andrés Rodríguez Toro Author Rafael Rubilar Author F. Muñoz Author Eduardo Cartes Author Eduardo Acuña Author Jorge Cancino-Cancino Abstract Se presenta un modelo de ahusamiento para Eucalyptus nitens (Deane & Maiden) Maiden. Este es un modelo no lineal que fue ajustado con datos de 60 árboles con edades entre los 16 y 21 años, diámetros normales entre 11,5 y 52,0 cm, y con alturas totales entre 12,27 y 47,49 m. Cosechados en 6 rodales localizados en 3 comunas de la región de La Araucanía (Chile); en suelos de cenizas volcánicas. El modelo se contrastó con los existentes en la literatura, obteniendo la mejor precisión, el menor sesgo en cada fracción de altura, y la mayor eficiencia predictiva con un comportamiento gráfico flexible y estable en toda la longitud del fuste. La función de volumen obtenida de la integración numérica del modelo de ahusamiento, predice más de 99% del volumen del fuste sin corteza estimado mediante la fórmula de Smalian. Date 2016-06-01 Library Catalog ResearchGate Volume 48 Pages 101-114 Publication Revista de la Facultad de Ciencias Agrarias Journal Abbr Revista de la Facultad de Ciencias Agrarias Date Added 6/13/2024, 2:08:56 PM Modified 6/13/2024, 2:08:56 PM Notes:
Revisado por Víctor Pacheco
Attachments
Ecuaciones locales y generalizadas de altura-diámetro para pino radiata (Pinus radiata)
Item Type Journal Article Author Guillermo Trincado Author Cristián Leal D Date 00/2006 Library Catalog SciELO URL http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-92002006000100003&lng=es&nrm=iso&tlng=es Accessed 6/13/2024, 1:10:35 PM Extra Publisher: Universidad Austral de Chile Volume 27 Pages 23-34 Publication Bosque (Valdivia) DOI 10.4067/S0717-92002006000100003 Issue 1 ISSN 0717-9200 Date Added 6/13/2024, 1:10:35 PM Modified 6/13/2024, 1:10:35 PM Notes:
Revisado por Rocío Reinoso
Attachments
Modelos de perfil de tronco en <i>Nothofagus pumilio</i> (Poepp. et Endl.) Krasser y su utilización en el cálculo del volumen total
Item Type Journal Article Author J.M. Cellini Author G. Martínez Pastur Author E. Wabö Author M.V. Lencinas Date 2002 Volume 11 Publication Investigación Agraria: Sistemas y Recursos Forestales Issue 2 Date Added 6/17/2024, 2:20:36 PM Modified 6/17/2024, 2:23:29 PM Notes:
Revisado por Víctor Pacheco
Attachments
Comparison of Nonlinear Height Diameter Functions for Major Alberta Tree Species
Item Type Journal Article Author SH Huang Author Stephen Titus Author Douglas Wiens Abstract Twenty nonlinear height–diameter functions were fitted and evaluated for major Alberta species based on a data set consisting of 13 489 felled trees for 16 different species. All functions were fitted using weighted nonlinear least squares regression (w i = 1/DBH i ) because of the problem of unequal error variance. The examination and comparison of the weighted mean squared errors, the asymptotic t-statistics for the parameters, and the plots of studentized residuals against the predicted height show that many concave and sigmoidal functions can be used to describe the height–diameter relationships. The sigmoidal functions such as the Weibull-type function, the modified logistic function, the Chapman–Richards function, and the Schnute function generally gave the most satisfactory results. Date 1992-09-01 Library Catalog ResearchGate Volume 22 Pages 1297-1304 Publication Canadian Journal of Forest Research-revue Canadienne De Recherche Forestiere - CAN J FOREST RES DOI 10.1139/x92-172 Journal Abbr Canadian Journal of Forest Research-revue Canadienne De Recherche Forestiere - CAN J FOREST RES Date Added 6/17/2024, 2:26:54 PM Modified 6/17/2024, 2:26:54 PM Notes:
Revisado por Christian Salas
Attachments
Patterns in height-diameter relationships for selected tree species and sites in eastern Texas
Item Type Journal Article Author Mark R Fulton Abstract Relationships between tree height and diameter at breast height were described for 15 species across a range of sites in eastern Texas using a two-parameter equation. Maximum height varied significantly from site to site within a species, but the ratio of initial slope to maximum height was generally constant. Sites favoring tall trees of one species tended to favor tall trees of all species, especially among species found in the overstory. The greatest rates of height growth for a given diameter at breast height increment were found among some midstory and understory species. Date 1999-09-15 Library Catalog cdnsciencepub.com (Atypon) URL https://cdnsciencepub.com/doi/10.1139/x99-103 Accessed 6/17/2024, 2:33:33 PM Extra Publisher: NRC Research Press Volume 29 Pages 1445-1448 Publication Canadian Journal of Forest Research DOI 10.1139/x99-103 Issue 9 Journal Abbr Can. J. For. Res. ISSN 0045-5067 Date Added 6/17/2024, 2:33:33 PM Modified 6/17/2024, 2:33:33 PM Notes:
Revisado por Christian Salas
Attachments
Comparison of model forms for estimating stem taper and volume in the primary conifer species of the North American Acadian Region
Item Type Journal Article Author Rongxia Li Author Aaron R. Weiskittel Date 01/2010 Language en Library Catalog DOI.org (Crossref) URL https://annforsci.biomedcentral.com/articles/10.1051/forest/2009109 Accessed 6/17/2024, 2:37:46 PM Rights https://www.springer.com/tdm Volume 67 Pages 302-302 Publication Annals of Forest Science DOI 10.1051/forest/2009109 Issue 3 Journal Abbr Ann. For. Sci. ISSN 1286-4560, 1297-966X Date Added 6/17/2024, 2:37:46 PM Modified 6/17/2024, 2:37:46 PM Notes:
Revisado por Víctor Pacheco
Attachments
Funciones de perfil del tronco y tarifas de cubicación con clasificación de productos para Pinus sylvestris L. en Galicia
Item Type Journal Article Author N. Novo Author Alberto Rojo-Alboreca Author J. González Abstract Twenty one taper functions from seven different groups of models (single polynomials, segmented polynomials, potential, exponential, variable exponent, trigonometric and logarithmic taper functions) were fitted to a sample of 1694 diameter data. Diameter was measured at different heights of 163 Pinus sylvestris L. type trees of different ages and different site qualities from Galicia (Northest of Spain). The adjusted equations were compared and validated through an independent sample of 565 data of diameter-height from 73 type trees. A volume equation with product classification including the chosen exponential taper equation was developed. Date 2003-01-01 Library Catalog ResearchGate Volume 12 Pages 123-136 Publication Investigación agraria. Sistemas y recursos forestales Journal Abbr Investigación agraria. Sistemas y recursos forestales Date Added 6/17/2024, 2:40:30 PM Modified 6/17/2024, 2:40:30 PM Notes:
Revisado por Víctor pacheco
Attachments
Developing taper equations for planted teak (Tectona grandis L.f.) trees of central lowland Nepal
Item Type Journal Article Author Anil Koirala Author Cristian R. Montes Author Bronson P. Bullock Author Bishnu H. Wagle Date 09/2021 Language en Library Catalog DOI.org (Crossref) URL https://linkinghub.elsevier.com/retrieve/pii/S266671932100042X Accessed 6/24/2024, 5:31:32 PM Volume 5 Pages 100103 Publication Trees, Forests and People DOI 10.1016/j.tfp.2021.100103 Journal Abbr Trees, Forests and People ISSN 26667193 Date Added 6/24/2024, 5:31:32 PM Modified 6/24/2024, 5:31:32 PM Notes:
Revisado por Nicolás Campos
Attachments
Evaluating published approaches for modelling diameter at breast height from stump dimensions
Item Type Journal Article Author Nan C. Pond Author Robert E. Froese Date 2014-12-01 Language en Library Catalog DOI.org (Crossref) URL https://academic.oup.com/forestry/article-lookup/doi/10.1093/forestry/cpu029 Accessed 6/30/2024, 8:15:54 PM Volume 87 Pages 683-696 Publication Forestry: An International Journal of Forest Research DOI 10.1093/forestry/cpu029 Issue 5 ISSN 0015-752X, 1464-3626 Date Added 6/30/2024, 8:15:54 PM Modified 6/30/2024, 8:15:54 PM Notes:
Revisado por Marcos Marivil
Attachments
Validación de un modelo fustal para Pino insigne
Item Type Journal Article Author Fernando Cox Date 1985 Publication Facultad de Ciencias Agrarias y Forestales Date Added 9/23/2024, 12:17:15 PM Modified 9/23/2024, 12:22:30 PM Notes:
Revisado por Victor Pacheco
Attachments
Height prediction equations using diameter and stand density measures
Item Type Journal Article Author Christie Staudhammer Author Valerie LeMay Abstract Height equations for western hemlock (Tsuga heterophylla (Raf.) Sarg.), western red cedar (Thuja plicata Donn), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), and alder (Alnus rubra Bong. and Alnus tenuifolia Nutt.) were fitted using dbh as the predictor variable. A simple, non-linear equation gave very similar results to the Weibull distribution, except for hemlock, which was better modelled using the more flexible Weibull distribution function. Introducing stand density variables into the base equations resulted in increased accuracy for predicting heights of alder. Smaller improvements were found for Douglas-fir, cedar, and hemlock. Key words: estimating height, Coastal BC, Weibull estimation, stand density measures Date 2000-04-01 Language en Library Catalog DOI.org (Crossref) URL http://pubs.cif-ifc.org/doi/10.5558/tfc76303-2 Accessed 9/13/2024, 12:25:05 PM Volume 76 Pages 303-309 Publication The Forestry Chronicle DOI 10.5558/tfc76303-2 Issue 2 Journal Abbr The Forestry Chronicle ISSN 0015-7546, 1499-9315 Date Added 9/13/2024, 12:25:05 PM Modified 9/13/2024, 12:25:05 PM Notes:
Revisado por Rocío Reinoso. Aceptado con observaciones.
Attachments
An Evaluation of Sampling Methods and Model Forms for Estimating Height-Diameter Relationships in Loblolly Pine Plantations
Item Type Journal Article Author Alexandros A. Arabatzis Author Harold E. Burkhart Abstract Abstract The prediction performance of eight height-diameter regression models was compared for estimating mean stand height when fitted to data selected from 175 loblolly pine (Pinus taeda) sample plots by (i) simple random sampling without replacement, and (ii) stratified random sampling with dbh classes acting as strata. Among the models tested, the nonlinear model of the form H = aeb/D performed best especially when fitted to data selected by simple random sampling. A small gain in precision obtained by stratification into dbh classes was outweighed by a substantial increase in bias due to the arbitrary allocation of numbers of sample trees to the strata. To update existing height-diameter models, it is recommended that new trees be selected and measured on every occasion instead of retaining the same sample trees used previously for model fitting. For. Sci. 38(1):192-198. Date 1992-02-01 Language en Library Catalog DOI.org (Crossref) URL https://academic.oup.com/forestscience/article/38/1/192/4642795 Accessed 9/2/2024, 4:22:53 PM Volume 38 Pages 192-198 Publication Forest Science DOI 10.1093/forestscience/38.1.192 Issue 1 ISSN 0015-749X, 1938-3738 Date Added 9/2/2024, 4:22:53 PM Modified 9/2/2024, 4:22:53 PM Notes:
Revisado por Christian Salas
Attachments
New Models for Predicting Diameter at Breast Height from Stump Dimensions
Item Type Journal Article Author James A. Westfall Abstract Abstract Models to predict dbh from stump dimensions are presented for 18 species groups. Data used to fit the models were collected across thirteen states in the northeastern United States. Primarily because of the presence of multiple measurements from each tree, a mixed-effects modeling approach was used to account for the lack of independence among observations. The heterogeneous error variance was described as a function of stump diameter, which allowed for more accurate representation of prediction intervals. Application of the mean response model (fixed-effects parameters only) to independent data indicated an average absolute error between 0.2 and 0.7 in. for most groups. An additional advantage is that random-effect parameters allow the model to be calibrated to local conditions if some additional data are available. An example is provided that indicates the local calibration results in a mean residual value that is closer to zero compared with the mean response model. Efforts in other locales to use stump information to inform dbh predictions can obtain the same advancements by adopting a similar modeling methodology. Date 2010-03-01 Language en Library Catalog DOI.org (Crossref) URL https://academic.oup.com/njaf/article/27/1/21/4774230 Accessed 8/19/2024, 1:22:34 PM Volume 27 Pages 21-27 Publication Northern Journal of Applied Forestry DOI 10.1093/njaf/27.1.21 Issue 1 ISSN 0742-6348, 1938-3762 Date Added 8/19/2024, 1:22:34 PM Modified 8/19/2024, 1:22:34 PM Notes:
Revisado por Marcos Marivil
Attachments
A simple stem taper model with mixed effects for boreal black spruce
Item Type Journal Article Author Geneviève Lejeune Author Chhun-Huor Ung Author Mathieu Fortin Author Xiao Jing Guo Author Marie-Claude Lambert Author Jean-Claude Ruel Abstract We simplified Kozak’s taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision. The simplification was required to facilitate the estimation of the covariance parameters when using a mixed-effects method. This method was necessary to take into account the correlation among multiple diameter measurements on an individual stem. The simple stem taper model was fitted to an extended data set collected across the province of Quebec, Canada. Comparison of the predicted stem taper and the derived stem volume with those obtained using existing models showed a comparable predictive power for the simple model. Including a prediction of the tree random effects based on supplementary diameter measurements of the bole improves the predictive ability of the model around the extra diameter observation. This model offers welcome simplicity as a means of predicting tree taper at coarse resolution for planning tree harvesting. Date 2009-09-01 Language en Library Catalog Springer Link URL https://doi.org/10.1007/s10342-009-0300-8 Accessed 8/12/2024, 11:16:53 AM Volume 128 Pages 505-513 Publication European Journal of Forest Research DOI 10.1007/s10342-009-0300-8 Issue 5 Journal Abbr Eur J Forest Res ISSN 1612-4677 Date Added 8/12/2024, 11:16:53 AM Modified 8/12/2024, 11:16:53 AM Tags:
Notes:
Revisado por Nicolás Campos
Attachments
Comparison of Data Grouping Strategies on Prediction Accuracy of Tree-Stem Taper for Six Common Species in the Southeastern US
Item Type Journal Article Author Sheng-I Yang Author P. Corey Green Abstract Clustering data into similar characteristic groups is a commonly-used strategy in model development. However, the impact of data grouping strategies on modeling stem taper has not been well quantified. The objective of this study was to compare the prediction accuracy of different data grouping strategies. Specifically, a population-level model was compared to the models fitted with grouped data based on taxonomic rank, tree form and size. A total of 3678 trees were used in the analyses, which included six common species in upland hardwood forests of the southeastern U.S. Results showed that overall predictions are more accurate when building stem taper models at the species, species group or division level rather than at the population level. The prediction accuracy was not considerably improved between species-specific functions and models fitted with species-related groups for the four hardwood species examined. Grouping data by taxonomic rank provided more reliable predictions than height-to-diameter ratio (H–D ratio) or diameter at breast height (DBH). The form/size-related grouping methods (i.e., data grouped by H–D ratio or DBH) generally did not improve the prediction precision compared to a population-level model. In this study, the effect of sample size in model fitting showed a minimal impact on prediction accuracy. The methodology presented in this study provides a modeling strategy for mixed-species data, which will be of practical importance when data grouping is needed for developing stem taper models. Date 2022-01-20 Language en Library Catalog DOI.org (Crossref) URL https://www.mdpi.com/1999-4907/13/2/156 Accessed 8/8/2024, 11:00:09 AM Rights https://creativecommons.org/licenses/by/4.0/ Volume 13 Pages 156 Publication Forests DOI 10.3390/f13020156 Issue 2 Journal Abbr Forests ISSN 1999-4907 Date Added 8/8/2024, 11:00:09 AM Modified 8/8/2024, 11:00:09 AM Notes:
Revisado por Víctor Pacheco
Attachments
Modeling of tree height–diameter relationships in the Atlantic Forest: effect of forest type on tree allometry
Item Type Journal Article Author Vinicius Costa Cysneiros Author Allan Libanio Pelissari Author Tatiana Dias Gaui Author Luan Demarco Fiorentin Author Daniel Costa De Carvalho Author Telmo Borges Silveira Filho Author Sebastião Do Amaral Machado Abstract Tree height is one of the most important variables for quantitative assessment of forest stocks, but it is difficult to directly measure. Such allometric relationships of trees can vary between geographical regions, however, mainly due to climatic, edaphic, and floristic gradients. Based on the hypothesis that different forest types influence the generic modeling of tree height–diameter relationships on geographical scales, this study aimed to (i) fit equations to estimate tree height in Atlantic Forest types in the state of Rio de Janeiro, Brazil; (ii) compare efficiency and precision between generic and specific equations for forest types; and (iii) test the effect of different forest types and species on the height–diameter relationship. Four allometric models were tested for all forests (generic) and three main forest types (specific). Effects of tree size, forest types, and species on tree height estimation were analyzed using multiple linear models and mixed-effect linear models. A significant effect of forest type and species on tree height was seen, showing the need to apply local specific equations to minimize the effects that are not captured by generic equations. Differences in tree allometry between forest types were associated with temperature, rainfall, soil, and forest structure. These results confirm the effect of the local environment on the height–diameter relationship of trees as found over large scales in tropical forests. Date 12/2020 Language en Short Title Modeling of tree height–diameter relationships in the Atlantic Forest Library Catalog DOI.org (Crossref) URL https://cdnsciencepub.com/doi/10.1139/cjfr-2020-0060 Accessed 7/29/2024, 12:10:43 PM Rights http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Volume 50 Pages 1289-1298 Publication Canadian Journal of Forest Research DOI 10.1139/cjfr-2020-0060 Issue 12 Journal Abbr Can. J. For. Res. ISSN 0045-5067, 1208-6037 Date Added 7/29/2024, 12:10:43 PM Modified 7/29/2024, 12:10:43 PM Notes:
Revisado por Rocío Reinoso
Attachments
Ajuste y validación de ecuaciones de volumen para un relicto del bosque de Roble-Laurel-Lingue
Item Type Journal Article Author Christian Salas Eljatib Date 07/2002 Language en Library Catalog DOI.org (Crossref) URL http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002002000200009&lng=en&nrm=iso&tlng=en Accessed 7/22/2024, 9:18:43 AM Volume 23 Publication Bosque (Valdivia) DOI 10.4067/S0717-92002002000200009 Issue 2 Journal Abbr Bosque (Valdivia) ISSN 0717-9200 Date Added 7/22/2024, 9:18:43 AM Modified 7/22/2024, 9:18:43 AM Notes:
Revisado por Christian Salas
Attachments