IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS

Detalhes bibliográficos
Autor(a) principal: Queiroz, Waldenei Travassos de
Data de Publicação: 2017
Outros Autores: Silva, Marcelo Lúcio, Jardim, Fernando Cristovam Silva, Vale, Rodrigo, Valente, Mário Diego Rocha, Pinheiro, João
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/26446
Resumo: Principal components and factor analysis were used to evaluate the applicability of the linear model IVI = a1Ar + a2Dr + a3Fr for obtaining indexes of value of importance (IVI) for tree species, where Ar is relative abundance, Dr is the relative dominance and Fr is the relative frequency, to compare with the standard univariate method that considers a1 = a2 = a3 =1. The data comprised a sample of 104.04 ha, located in Tapajós National Forest, Belterra municipality, state of Pará, covering of a set of 36 clusters of 4 ha each, Malta croos-shaped, with four subplots of 1ha each. To obtain the IVI’sby species within each cluster, each subplot was subdivided each into 5 sub-subplots of 0.2 ha each. The analysis revealed that the values obtained by multivariable differ from those obtained by the standard equation. It was also found that the values of univariate and multivariate indices vary significantly within the forest, and therefore are not recommended, as they usually are, to infer a single value for the whole forest area, because species considered of minor importance for the overall forest may be of great importance in particular subareas. The use of linear model with a1 = a2 = a3 =1i s not suitable, because of the wide variation of the coefficients among species and their spatial distribution in the forest. 
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spelling IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORSÍNDICE DE VALOR DE IMPORTÂNCIA DE ESPÉCIES ARBÓREAS DA FLORESTA NACIONAL DO TAPAJÓS VIA ANÁLISES DE COMPONENTES PRINCIPAIS E DE FATORESphytosociologyforest inventorycluster sampling.fitossociologiainventário florestalamostra por conglomerado.Principal components and factor analysis were used to evaluate the applicability of the linear model IVI = a1Ar + a2Dr + a3Fr for obtaining indexes of value of importance (IVI) for tree species, where Ar is relative abundance, Dr is the relative dominance and Fr is the relative frequency, to compare with the standard univariate method that considers a1 = a2 = a3 =1. The data comprised a sample of 104.04 ha, located in Tapajós National Forest, Belterra municipality, state of Pará, covering of a set of 36 clusters of 4 ha each, Malta croos-shaped, with four subplots of 1ha each. To obtain the IVI’sby species within each cluster, each subplot was subdivided each into 5 sub-subplots of 0.2 ha each. The analysis revealed that the values obtained by multivariable differ from those obtained by the standard equation. It was also found that the values of univariate and multivariate indices vary significantly within the forest, and therefore are not recommended, as they usually are, to infer a single value for the whole forest area, because species considered of minor importance for the overall forest may be of great importance in particular subareas. The use of linear model with a1 = a2 = a3 =1i s not suitable, because of the wide variation of the coefficients among species and their spatial distribution in the forest. Este trabalho avaliou, a partir das análises de componentes principais e de fatores, a aplicabilidade do modelo linear IVI = a1Ar + a2Dr + a3Fr para obter índices de valor de importância (IVI) para espécies arbóreas, em que Ar é a abundância relativa, Dr é a dominância relativa e Fr é a frequência relativa, comparando-os com o método univariado que considera a equação tradicional que considera a1 = a2 = a3 =1. Os dados foram analisados a partir de uma amostra de 104,04 ha, localizada na Floresta Nacional do Tapajós, município de Belterra, estado do Pará, abrangendo um conjunto de 36 conglomerados de 4 ha, formato cruz de malta, com quatro subparcelas de 1 ha. Para obter os IVIs por espécie dentro de cada conglomerado, as subparcelas foram subdivididas cada uma em 5 subsubparcelas de 0,2 ha. Os resultados mostraram que os valores obtidos pelos métodos multivariados são diferentes dos computados pela equação tradicional. Verificou-se, também, que os valores dos índices uni e multivariados variaram de forma significativa dentro da floresta, não sendo recomendável, como normalmente ocorre, inferir um valor único para a área total da floresta, pois espécies consideradas de menor importância para o total da floresta podem possuir grande importância em determinadas subáreas. O uso do modelo linear com a1 = a2 = a3 =1 não é adequado, pois, por espécie e de acordo com a sua distribuição na floresta, esses coeficientes apresentam grandes variações. Universidade Federal de Santa Maria2017-03-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2644610.5902/1980509826446Ciência Florestal; Vol. 27 No. 1 (2017); 47-59Ciência Florestal; v. 27 n. 1 (2017); 47-591980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/26446/pdfCopyright (c) 2017 Ciência Florestalinfo:eu-repo/semantics/openAccessQueiroz, Waldenei Travassos deSilva, Marcelo LúcioJardim, Fernando Cristovam SilvaVale, RodrigoValente, Mário Diego RochaPinheiro, João2017-04-04T16:51:33Zoai:ojs.pkp.sfu.ca:article/26446Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-04T16:51:33Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
ÍNDICE DE VALOR DE IMPORTÂNCIA DE ESPÉCIES ARBÓREAS DA FLORESTA NACIONAL DO TAPAJÓS VIA ANÁLISES DE COMPONENTES PRINCIPAIS E DE FATORES
title IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
spellingShingle IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
Queiroz, Waldenei Travassos de
phytosociology
forest inventory
cluster sampling.
fitossociologia
inventário florestal
amostra por conglomerado.
title_short IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
title_full IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
title_fullStr IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
title_full_unstemmed IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
title_sort IMPORTANCE VALUE INDEX OF TREE SPECIES OF TAPAJÓS NATIONAL FOREST BY ANALYSIS OF PRINCIPAL COMPONENTS AND FACTORS
author Queiroz, Waldenei Travassos de
author_facet Queiroz, Waldenei Travassos de
Silva, Marcelo Lúcio
Jardim, Fernando Cristovam Silva
Vale, Rodrigo
Valente, Mário Diego Rocha
Pinheiro, João
author_role author
author2 Silva, Marcelo Lúcio
Jardim, Fernando Cristovam Silva
Vale, Rodrigo
Valente, Mário Diego Rocha
Pinheiro, João
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Queiroz, Waldenei Travassos de
Silva, Marcelo Lúcio
Jardim, Fernando Cristovam Silva
Vale, Rodrigo
Valente, Mário Diego Rocha
Pinheiro, João
dc.subject.por.fl_str_mv phytosociology
forest inventory
cluster sampling.
fitossociologia
inventário florestal
amostra por conglomerado.
topic phytosociology
forest inventory
cluster sampling.
fitossociologia
inventário florestal
amostra por conglomerado.
description Principal components and factor analysis were used to evaluate the applicability of the linear model IVI = a1Ar + a2Dr + a3Fr for obtaining indexes of value of importance (IVI) for tree species, where Ar is relative abundance, Dr is the relative dominance and Fr is the relative frequency, to compare with the standard univariate method that considers a1 = a2 = a3 =1. The data comprised a sample of 104.04 ha, located in Tapajós National Forest, Belterra municipality, state of Pará, covering of a set of 36 clusters of 4 ha each, Malta croos-shaped, with four subplots of 1ha each. To obtain the IVI’sby species within each cluster, each subplot was subdivided each into 5 sub-subplots of 0.2 ha each. The analysis revealed that the values obtained by multivariable differ from those obtained by the standard equation. It was also found that the values of univariate and multivariate indices vary significantly within the forest, and therefore are not recommended, as they usually are, to infer a single value for the whole forest area, because species considered of minor importance for the overall forest may be of great importance in particular subareas. The use of linear model with a1 = a2 = a3 =1i s not suitable, because of the wide variation of the coefficients among species and their spatial distribution in the forest. 
publishDate 2017
dc.date.none.fl_str_mv 2017-03-31
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/26446
10.5902/1980509826446
url https://periodicos.ufsm.br/cienciaflorestal/article/view/26446
identifier_str_mv 10.5902/1980509826446
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/26446/pdf
dc.rights.driver.fl_str_mv Copyright (c) 2017 Ciência Florestal
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Ciência Florestal
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Florestal; Vol. 27 No. 1 (2017); 47-59
Ciência Florestal; v. 27 n. 1 (2017); 47-59
1980-5098
0103-9954
reponame:Ciência Florestal (Online)
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Florestal (Online)
collection Ciência Florestal (Online)
repository.name.fl_str_mv Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv ||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br
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