Diameter distribution of wood residues in logged and unlogged forest areas of the eastern brazilian Amazon
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
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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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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1815439211361206272 |