Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models
Tree growth is one of the main variables needed for forest management planning. The use of simple models containing traditional equations to describe tree growth is common. However, equations that incorporate different factors (e.g. site quality of the stands, crown classes of the trees, silvicultural treatments) may improve their accuracy in a wide range of stand conditions. The aim of this work was to compare the accuracy of tree diameter growth models using (i) a family of simple equations adjusted by stand site quality and crown class of trees, and (ii) a unique global equation including stand and individual tree variables. Samplings were conducted in 136 natural even-aged Nothofagus antarctica (Forster f.) Oersted stands in Southern Patagonia (Argentina) covering age (20–200 years), crown class and site quality gradients. The following diameter growth models were fitted: 16 simple equations using two independent variables (age and one equation for each stand site quality or crown class) based on Richards model, plus a unique global equation using three independent variables (age, stand site quality and crown class). Simple equations showed higher variability in their accuracy, explained between 54% and 92% of the data variation. The global model presented similar accuracy like the better equations of the simple growth models. The unification of the simple growth models into a unique global equation did not greatly improve the accuracy of estimations, but positively influenced the biological response of the model. Another advantage of the global equation is the simple use under a wide range of natural stand conditions. The proposed global model allows to explain the tree growth of N. antarctica trees along the natural studied gradients.
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Czech Academy of Agricultural Sciences
2014
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Subjects: | Bosques, Nothofagus, Diámetro, Modelos de Crecimiento Forestal, Clases de Copa, Características del Sitio, Forests, Diameter, Growth Models, Crown Classes, Site Factors, Nothofagus antarctica, |
Online Access: | https://www.agriculturejournals.cz/publicFiles/22_2014-JFS.pdf http://hdl.handle.net/20.500.12123/3965 https://doi.org/10.17221/22/2014-JFS |
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oai:localhost:20.500.12123-39652018-11-26T13:51:12Z Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models Ivancich, Horacio Simón Martínez Pastur, Guillermo José Lencinas, María Vanessa Cellini, Juan Manuel Peri, Pablo Luis Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica Tree growth is one of the main variables needed for forest management planning. The use of simple models containing traditional equations to describe tree growth is common. However, equations that incorporate different factors (e.g. site quality of the stands, crown classes of the trees, silvicultural treatments) may improve their accuracy in a wide range of stand conditions. The aim of this work was to compare the accuracy of tree diameter growth models using (i) a family of simple equations adjusted by stand site quality and crown class of trees, and (ii) a unique global equation including stand and individual tree variables. Samplings were conducted in 136 natural even-aged Nothofagus antarctica (Forster f.) Oersted stands in Southern Patagonia (Argentina) covering age (20–200 years), crown class and site quality gradients. The following diameter growth models were fitted: 16 simple equations using two independent variables (age and one equation for each stand site quality or crown class) based on Richards model, plus a unique global equation using three independent variables (age, stand site quality and crown class). Simple equations showed higher variability in their accuracy, explained between 54% and 92% of the data variation. The global model presented similar accuracy like the better equations of the simple growth models. The unification of the simple growth models into a unique global equation did not greatly improve the accuracy of estimations, but positively influenced the biological response of the model. Another advantage of the global equation is the simple use under a wide range of natural stand conditions. The proposed global model allows to explain the tree growth of N. antarctica trees along the natural studied gradients. EEA Santa Cruz Fil: Ivancich, Horacio Simón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Cientificas; Argentina Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Cellini, Juan Manuel. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Investigacion en Sistemas Ecologicos y Ambientales; Argentina Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2018-11-26T13:48:49Z 2018-11-26T13:48:49Z 2014 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.agriculturejournals.cz/publicFiles/22_2014-JFS.pdf http://hdl.handle.net/20.500.12123/3965 1212-4834 1805-935X https://doi.org/10.17221/22/2014-JFS eng info:eu-repo/semantics/openAccess application/pdf Czech Academy of Agricultural Sciences Journal of Forest Science 60 (8) : 307–317 (2014) |
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Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica |
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Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica Ivancich, Horacio Simón Martínez Pastur, Guillermo José Lencinas, María Vanessa Cellini, Juan Manuel Peri, Pablo Luis Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
description |
Tree growth is one of the main variables needed for forest management planning. The use of simple models containing traditional equations to describe tree growth is common. However, equations that incorporate different factors (e.g. site quality of the stands, crown classes of the trees, silvicultural treatments) may improve their accuracy in a wide range of stand conditions. The aim of this work was to compare the accuracy of tree diameter growth models using (i) a family of simple equations adjusted by stand site quality and crown class of trees, and (ii) a unique global equation including stand and individual tree variables. Samplings were conducted in 136 natural even-aged Nothofagus antarctica (Forster f.) Oersted stands in Southern Patagonia (Argentina) covering age (20–200 years), crown class and site quality gradients. The following diameter growth models were fitted: 16 simple equations using two independent variables (age and one equation for each stand site quality or crown class) based on Richards model, plus a unique global equation using three independent variables (age, stand site quality and crown class). Simple equations showed higher variability in their accuracy, explained between 54% and 92% of the data variation. The global model presented similar accuracy like the better equations of the simple growth models. The unification of the simple growth models into a unique global equation did not greatly improve the accuracy of estimations, but positively influenced the biological response of the model. Another advantage of the global equation is the simple use under a wide range of natural stand conditions. The proposed global model allows to explain the tree growth of N. antarctica trees along the natural studied gradients. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Bosques Nothofagus Diámetro Modelos de Crecimiento Forestal Clases de Copa Características del Sitio Forests Diameter Growth Models Crown Classes Site Factors Nothofagus antarctica |
author |
Ivancich, Horacio Simón Martínez Pastur, Guillermo José Lencinas, María Vanessa Cellini, Juan Manuel Peri, Pablo Luis |
author_facet |
Ivancich, Horacio Simón Martínez Pastur, Guillermo José Lencinas, María Vanessa Cellini, Juan Manuel Peri, Pablo Luis |
author_sort |
Ivancich, Horacio Simón |
title |
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
title_short |
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
title_full |
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
title_fullStr |
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
title_full_unstemmed |
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models |
title_sort |
proposals for nothofagus antarctica diameter growth estimation: simple vs. global models |
publisher |
Czech Academy of Agricultural Sciences |
publishDate |
2014 |
url |
https://www.agriculturejournals.cz/publicFiles/22_2014-JFS.pdf http://hdl.handle.net/20.500.12123/3965 https://doi.org/10.17221/22/2014-JFS |
work_keys_str_mv |
AT ivancichhoraciosimon proposalsfornothofagusantarcticadiametergrowthestimationsimplevsglobalmodels AT martinezpasturguillermojose proposalsfornothofagusantarcticadiametergrowthestimationsimplevsglobalmodels AT lencinasmariavanessa proposalsfornothofagusantarcticadiametergrowthestimationsimplevsglobalmodels AT cellinijuanmanuel proposalsfornothofagusantarcticadiametergrowthestimationsimplevsglobalmodels AT peripabloluis proposalsfornothofagusantarcticadiametergrowthestimationsimplevsglobalmodels |
_version_ |
1756007324316598273 |