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, silvicultur...

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Published in:Journal of Forest Science
Main Authors: H. Ivancich, G.J. Martínez Pastur, M.V. Lencinas, J.M. Cellini, P.L. Peri
Format: Article in Journal/Newspaper
Language:English
Published: Czech Academy of Agricultural Sciences 2014
Subjects:
Online Access:https://doi.org/10.17221/22/2014-JFS
https://doaj.org/article/68da13c96b0d43c3b4b6deeb2b7f590f
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spelling ftdoajarticles:oai:doaj.org/article:68da13c96b0d43c3b4b6deeb2b7f590f 2023-05-15T13:54:41+02:00 Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models H. Ivancich G.J. Martínez Pastur M.V. Lencinas J.M. Cellini P.L. Peri 2014-08-01T00:00:00Z https://doi.org/10.17221/22/2014-JFS https://doaj.org/article/68da13c96b0d43c3b4b6deeb2b7f590f EN eng Czech Academy of Agricultural Sciences https://jfs.agriculturejournals.cz/artkey/jfs-201408-0001_proposals-for-nothofagus-antarctica-diameter-growth-estimation-simple-vs-global-models.php https://doaj.org/toc/1212-4834 https://doaj.org/toc/1805-935X 1212-4834 1805-935X doi:10.17221/22/2014-JFS https://doaj.org/article/68da13c96b0d43c3b4b6deeb2b7f590f Journal of Forest Science, Vol 60, Iss 8, Pp 307-317 (2014) growth models site quality crown class Forestry SD1-669.5 article 2014 ftdoajarticles https://doi.org/10.17221/22/2014-JFS 2023-02-26T01:34:40Z 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. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Argentina Patagonia Journal of Forest Science 60 8 307 317
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic growth models
site quality
crown class
Forestry
SD1-669.5
spellingShingle growth models
site quality
crown class
Forestry
SD1-669.5
H. Ivancich
G.J. Martínez Pastur
M.V. Lencinas
J.M. Cellini
P.L. Peri
Proposals for Nothofagus antarctica diameter growth estimation: simple vs. global models
topic_facet growth models
site quality
crown class
Forestry
SD1-669.5
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 Article in Journal/Newspaper
author H. Ivancich
G.J. Martínez Pastur
M.V. Lencinas
J.M. Cellini
P.L. Peri
author_facet H. Ivancich
G.J. Martínez Pastur
M.V. Lencinas
J.M. Cellini
P.L. Peri
author_sort H. Ivancich
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://doi.org/10.17221/22/2014-JFS
https://doaj.org/article/68da13c96b0d43c3b4b6deeb2b7f590f
geographic Argentina
Patagonia
geographic_facet Argentina
Patagonia
genre Antarc*
Antarctica
genre_facet Antarc*
Antarctica
op_source Journal of Forest Science, Vol 60, Iss 8, Pp 307-317 (2014)
op_relation https://jfs.agriculturejournals.cz/artkey/jfs-201408-0001_proposals-for-nothofagus-antarctica-diameter-growth-estimation-simple-vs-global-models.php
https://doaj.org/toc/1212-4834
https://doaj.org/toc/1805-935X
1212-4834
1805-935X
doi:10.17221/22/2014-JFS
https://doaj.org/article/68da13c96b0d43c3b4b6deeb2b7f590f
op_doi https://doi.org/10.17221/22/2014-JFS
container_title Journal of Forest Science
container_volume 60
container_issue 8
container_start_page 307
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