Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models

Autores
Ivancich, Horacio Simón; Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Cellini, Juan Manuel; Peri, Pablo Luis
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Laboratorio de Investigación de Sistemas Ecológicos y Ambientales
Materia
Ciencias Agrarias
Growth models
Nothofagus forests
Diameter
Site quality
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/98950

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spelling Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global modelsIvancich, Horacio SimónMartínez Pastur, Guillermo JoséLencinas, María VanessaCellini, Juan ManuelPeri, Pablo LuisCiencias AgrariasGrowth modelsNothofagus forestsDiameterSite qualityTree 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.Laboratorio de Investigación de Sistemas Ecológicos y Ambientales2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf307-317http://sedici.unlp.edu.ar/handle/10915/98950enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/5497info:eu-repo/semantics/altIdentifier/url/http://www.agriculturejournals.cz/web/jfs.htm?volume=60&firstPage=307&type=publishedArticleinfo:eu-repo/semantics/altIdentifier/issn/1212-4834info:eu-repo/semantics/altIdentifier/hdl/11336/5497info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:21:00Zoai:sedici.unlp.edu.ar:10915/98950Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:21:00.68SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
title Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
spellingShingle Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
Ivancich, Horacio Simón
Ciencias Agrarias
Growth models
Nothofagus forests
Diameter
Site quality
title_short Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
title_full Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
title_fullStr Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
title_full_unstemmed Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
title_sort Proposals for <i>Nothofagus antarctica</i> diameter growth estimation: Simple vs. global models
dc.creator.none.fl_str_mv Ivancich, Horacio Simón
Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Cellini, Juan Manuel
Peri, Pablo Luis
author Ivancich, Horacio Simón
author_facet Ivancich, Horacio Simón
Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Cellini, Juan Manuel
Peri, Pablo Luis
author_role author
author2 Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Cellini, Juan Manuel
Peri, Pablo Luis
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Agrarias
Growth models
Nothofagus forests
Diameter
Site quality
topic Ciencias Agrarias
Growth models
Nothofagus forests
Diameter
Site quality
dc.description.none.fl_txt_mv 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.
Laboratorio de Investigación de Sistemas Ecológicos y Ambientales
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.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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format article
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/98950
url http://sedici.unlp.edu.ar/handle/10915/98950
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/url/http://www.agriculturejournals.cz/web/jfs.htm?volume=60&firstPage=307&type=publishedArticle
info:eu-repo/semantics/altIdentifier/issn/1212-4834
info:eu-repo/semantics/altIdentifier/hdl/11336/5497
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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dc.format.none.fl_str_mv application/pdf
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