A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.5/8068 |
Resumo: | A generalized height–diameter model was developed for Eucalyptus globulus Labill. stands in Galicia (northwestern Spain). The study involved a variety of pure stands ranging from even-aged to unevenaged. Data were obtained from permanent circular sample plots in which trees were sampled within different radii according to their diameter at breast height. A combination ofweighted regression, to take into account the unequal selection probabilities of such an inventory design, and mixed model techniques, to accommodate local random fluctuations in the height–diameter relationship, were applied to estimate fixed and random parameters for several models reported in the relevant literature. The models that provided the best results included dominant height and dominant diameter as fixed effects. These models explained more than 83% of the observed variability, with mean errors of less than 2.5 m. Random parameters for particular plots were estimated with different tree selection options. Height–diameter relationships tailored to individual plots can be obtained by calibration of the height measurements of the three smallest trees in a plot. An independent dataset was used to test the performance of themodel with data not used in the fitting process, and to demonstrate the advantages of calibrating the mixed-effects model. |
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A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spaingrowth modelrandom effectscalibrationunequal selection probabilitiesweighted regressionTasmanian blue gumA generalized height–diameter model was developed for Eucalyptus globulus Labill. stands in Galicia (northwestern Spain). The study involved a variety of pure stands ranging from even-aged to unevenaged. Data were obtained from permanent circular sample plots in which trees were sampled within different radii according to their diameter at breast height. A combination ofweighted regression, to take into account the unequal selection probabilities of such an inventory design, and mixed model techniques, to accommodate local random fluctuations in the height–diameter relationship, were applied to estimate fixed and random parameters for several models reported in the relevant literature. The models that provided the best results included dominant height and dominant diameter as fixed effects. These models explained more than 83% of the observed variability, with mean errors of less than 2.5 m. Random parameters for particular plots were estimated with different tree selection options. Height–diameter relationships tailored to individual plots can be obtained by calibration of the height measurements of the three smallest trees in a plot. An independent dataset was used to test the performance of themodel with data not used in the fitting process, and to demonstrate the advantages of calibrating the mixed-effects model.ElsevierRepositório da Universidade de LisboaCrecente-Campo, FelipeTomé, MargaridaSoares, PaulaDiéguez-Aranda, Ulises2015-03-03T10:58:37Z20102010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/8068eng"Forest Ecology and Management". ISSN 0378-1127. 259 (2010) 943-9520378-1127info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:38:43Zoai:www.repository.utl.pt:10400.5/8068Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:55:08.430753Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
title |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
spellingShingle |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain Crecente-Campo, Felipe growth model random effects calibration unequal selection probabilities weighted regression Tasmanian blue gum |
title_short |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
title_full |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
title_fullStr |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
title_full_unstemmed |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
title_sort |
A generalized nonlinear mixed-effects height-diameter model for Eucalyptus globulus L. in northwestern Spain |
author |
Crecente-Campo, Felipe |
author_facet |
Crecente-Campo, Felipe Tomé, Margarida Soares, Paula Diéguez-Aranda, Ulises |
author_role |
author |
author2 |
Tomé, Margarida Soares, Paula Diéguez-Aranda, Ulises |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Crecente-Campo, Felipe Tomé, Margarida Soares, Paula Diéguez-Aranda, Ulises |
dc.subject.por.fl_str_mv |
growth model random effects calibration unequal selection probabilities weighted regression Tasmanian blue gum |
topic |
growth model random effects calibration unequal selection probabilities weighted regression Tasmanian blue gum |
description |
A generalized height–diameter model was developed for Eucalyptus globulus Labill. stands in Galicia (northwestern Spain). The study involved a variety of pure stands ranging from even-aged to unevenaged. Data were obtained from permanent circular sample plots in which trees were sampled within different radii according to their diameter at breast height. A combination ofweighted regression, to take into account the unequal selection probabilities of such an inventory design, and mixed model techniques, to accommodate local random fluctuations in the height–diameter relationship, were applied to estimate fixed and random parameters for several models reported in the relevant literature. The models that provided the best results included dominant height and dominant diameter as fixed effects. These models explained more than 83% of the observed variability, with mean errors of less than 2.5 m. Random parameters for particular plots were estimated with different tree selection options. Height–diameter relationships tailored to individual plots can be obtained by calibration of the height measurements of the three smallest trees in a plot. An independent dataset was used to test the performance of themodel with data not used in the fitting process, and to demonstrate the advantages of calibrating the mixed-effects model. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 2010-01-01T00:00:00Z 2015-03-03T10:58:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.5/8068 |
url |
http://hdl.handle.net/10400.5/8068 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Forest Ecology and Management". ISSN 0378-1127. 259 (2010) 943-952 0378-1127 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131028771569664 |