Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon

Detalhes bibliográficos
Autor(a) principal: Cruz Filho, Deusdedith
Data de Publicação: 2016
Outros Autores: Barros, Paulo Luiz Contente de, Silva, José Natalino Macedo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/14016
Resumo: This study aimed to investigate the patterns of diameter distribution of residual wood pieces found on the forestground (e.g. tree branches, sound and hollowed trunks, log trimmings) of an unlogged and of a logged forest area one year after logging operations with impact reduction techniques (EIR), by setting up a mathematical model. Diameters were field measured of wood residue pieces in 48 sampling units systematically distributed across the experimental area, 24 units for each situation, that is, unlogged (FNE) and logged forest (FE), with sampling errors of 8.32% and 7.58% respectively for the variable volume (m³.ha-1), applying the line intercept sampling method proposed by Wagner (1968). In both situations, the diameter distribution of the wood residue pieces was decreasing and reverse J-shaped, similarly to the DBH distribution occurring in native forests of the Amazon. A highly significant linear correlation exists between the diameter class midpoints and the number of wood residue pieces. Distributions were modeled using the exponential equation proposed by Meyer (1952), whose adjusted coefficients of determination (r²aj.) were 98.6% and 94.8%, for unlogged and logged forest areas respectively.
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spelling Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian AmazonDistribuição diamétrica de resíduos lenhosos, em floresta explorada e não explorada na Amazônia oriental brasileiraLine intercept samplingRain forestRegression analysisAmazonAmostragem por linha interceptadoraAmazôniaFloresta tropicalAnálise de regressãoAmostragemThis study aimed to investigate the patterns of diameter distribution of residual wood pieces found on the forestground (e.g. tree branches, sound and hollowed trunks, log trimmings) of an unlogged and of a logged forest area one year after logging operations with impact reduction techniques (EIR), by setting up a mathematical model. Diameters were field measured of wood residue pieces in 48 sampling units systematically distributed across the experimental area, 24 units for each situation, that is, unlogged (FNE) and logged forest (FE), with sampling errors of 8.32% and 7.58% respectively for the variable volume (m³.ha-1), applying the line intercept sampling method proposed by Wagner (1968). In both situations, the diameter distribution of the wood residue pieces was decreasing and reverse J-shaped, similarly to the DBH distribution occurring in native forests of the Amazon. A highly significant linear correlation exists between the diameter class midpoints and the number of wood residue pieces. Distributions were modeled using the exponential equation proposed by Meyer (1952), whose adjusted coefficients of determination (r²aj.) were 98.6% and 94.8%, for unlogged and logged forest areas respectively.Neste trabalho, objetivou-se estudar o comportamento da distribuição dos diâmetros das peças de resíduos lenhosos encontrados no chão da floresta (e.g galhos de árvores, troncos sãos e ocados, aparas de toras) em área de floresta explorada e em área com um ano após a exploração florestal, utilizando-se técnicas de redução de impactos (EIR), ajustando-se um modelo matemático. Os diâmetros das peças de resíduos foram coletados no campo mediante o levantamento de 48 unidades de amostra, distribuídas, sistematicamente, na área, sendo 24 unidades em cada situação de floresta não explorada (FNE) e floresta explorada (FE), com erro de amostragem para a variável volume (m³.ha-1) de 8,32 % e 7,58 % respectivamente, aplicando-se o método de amostragem por linhas interceptadoras (Line Intercept Sampling), proposto por Wagner (1968). A distribuição dos diâmetros dessas peças de resíduos encontrada nas duas situações levantadas foi decrescente e em forma de “J” invertido, semelhante à distribuição dos DAP das árvores em florestas nativas da Amazônia. Existe correlação linear altamente significativa entre os centros de classe e o número de peças de resíduos, sendo essas ajustadas pelo modelo exponencial proposto por Meyer (1952), cujos coeficientes de determinação ajustado (r²aj.) encontrados foram de 98,6 % e 94,8 %, para floresta não explorada e floresta explorada, respectivamente.Universidade Federal de Lavras (UFLA)2016-04-062017-08-01T20:13:19Z2017-08-01T20:13:19Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfCRUZ FILHO, D.; BARROS, P. L. C. de; SILVA, J. N. M. Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon. CERNE, Lavras, v. 19, n. 3, p. 383-389, jul./set. 2013. DOI: 10.1590/S0104-77602013000300004.http://repositorio.ufla.br/jspui/handle/1/140162317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/915/691Copyright (c) 2016 CERNEhttp://creativecommons.org/licenses/by/4.0/Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccessCruz Filho, DeusdedithBarros, Paulo Luiz Contente deSilva, José Natalino Macedo2021-08-28T21:10:52Zoai:localhost:1/14016Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-08-28T21:10:52Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
Distribuição diamétrica de resíduos lenhosos, em floresta explorada e não explorada na Amazônia oriental brasileira
title Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
spellingShingle Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
Cruz Filho, Deusdedith
Line intercept sampling
Rain forest
Regression analysis
Amazon
Amostragem por linha interceptadora
Amazônia
Floresta tropical
Análise de regressão
Amostragem
title_short Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
title_full Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
title_fullStr Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
title_full_unstemmed Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
title_sort Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
author Cruz Filho, Deusdedith
author_facet Cruz Filho, Deusdedith
Barros, Paulo Luiz Contente de
Silva, José Natalino Macedo
author_role author
author2 Barros, Paulo Luiz Contente de
Silva, José Natalino Macedo
author2_role author
author
dc.contributor.author.fl_str_mv Cruz Filho, Deusdedith
Barros, Paulo Luiz Contente de
Silva, José Natalino Macedo
dc.subject.por.fl_str_mv Line intercept sampling
Rain forest
Regression analysis
Amazon
Amostragem por linha interceptadora
Amazônia
Floresta tropical
Análise de regressão
Amostragem
topic Line intercept sampling
Rain forest
Regression analysis
Amazon
Amostragem por linha interceptadora
Amazônia
Floresta tropical
Análise de regressão
Amostragem
description This study aimed to investigate the patterns of diameter distribution of residual wood pieces found on the forestground (e.g. tree branches, sound and hollowed trunks, log trimmings) of an unlogged and of a logged forest area one year after logging operations with impact reduction techniques (EIR), by setting up a mathematical model. Diameters were field measured of wood residue pieces in 48 sampling units systematically distributed across the experimental area, 24 units for each situation, that is, unlogged (FNE) and logged forest (FE), with sampling errors of 8.32% and 7.58% respectively for the variable volume (m³.ha-1), applying the line intercept sampling method proposed by Wagner (1968). In both situations, the diameter distribution of the wood residue pieces was decreasing and reverse J-shaped, similarly to the DBH distribution occurring in native forests of the Amazon. A highly significant linear correlation exists between the diameter class midpoints and the number of wood residue pieces. Distributions were modeled using the exponential equation proposed by Meyer (1952), whose adjusted coefficients of determination (r²aj.) were 98.6% and 94.8%, for unlogged and logged forest areas respectively.
publishDate 2016
dc.date.none.fl_str_mv 2016-04-06
2017-08-01T20:13:19Z
2017-08-01T20:13:19Z
2017-08-01
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 CRUZ FILHO, D.; BARROS, P. L. C. de; SILVA, J. N. M. Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon. CERNE, Lavras, v. 19, n. 3, p. 383-389, jul./set. 2013. DOI: 10.1590/S0104-77602013000300004.
http://repositorio.ufla.br/jspui/handle/1/14016
identifier_str_mv CRUZ FILHO, D.; BARROS, P. L. C. de; SILVA, J. N. M. Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon. CERNE, Lavras, v. 19, n. 3, p. 383-389, jul./set. 2013. DOI: 10.1590/S0104-77602013000300004.
url http://repositorio.ufla.br/jspui/handle/1/14016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.cerne.ufla.br/site/index.php/CERNE/article/view/915/691
dc.rights.driver.fl_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras (UFLA)
publisher.none.fl_str_mv Universidade Federal de Lavras (UFLA)
dc.source.none.fl_str_mv 2317-6342
0104-7760
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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