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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
15/12/2020 |
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Data da última atualização: |
31/03/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIMA, R. B. de; RUTISHAUSER, E.; SILVA, J. A. A. da; GUEDES, M. C.; HERAULT, B.; OLIVEIRA, C. P. de; APARÍCIO, P. da S.; SOTTA, E. D.; SILVA, D. A. S. da; FERREIRA, R. L. C. |
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Afiliação: |
ROBSON BORGES DE LIMA, UEAP; ERVAN RUTISHAUSER, SMITHSONIAN TROPICAL RESEARCH INSTITUTE; JOSÉ ANTÔNIO ALEIXO DA SILVA, UFRPE; MARCELINO CARNEIRO GUEDES, CPAF-AP; BRUNO HERAULT, CIRAD; CINTHIA PEREIRA DE OLIVEIRA, UEAP; PERSEU DA SILVA APARÍCIO, UEAP; ELENEIDE DOFF SOTTA, CPAF-AP; DIEGO ARMANDO SILVA DA SILVA, IFAP; RINALDO LUIZ CARACIOLO FERREIRA, UFRPE. |
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Título: |
Accurate estimation of commercial volume in tropical forests. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Forest Science, p. 1-8, July 2020. |
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DOI: |
10.1093/forsci/fxaa032 |
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Idioma: |
Inglês |
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Conteúdo: |
Accurate estimates of commercial volume in tropical forests are key for the implementation of sustainable forest management plans. Because of the lack of local or generic volumetric equations, most forest managers and forestry services are still using traditional expansion factors (i.e., multiplication of the diameter by a given value) to estimate the volume of commercial tree species in the Amazon. Volumetric models were developed through a unique data set of 1,264 fallen trees fully measured in 150 sample plots located across a broad range of forests in Amapá, Brazil. Forest-specific volumetric models were developed and compared with a generic (i.e., across all forests) model and with published equations developed elsewhere in the Amazon. The generic equation performed well in all forest types and allowed precise predictions. The most efficient sampling design to develop volumetric models consists of measuring approximately 50 trees across four different size classes representing the whole population. The form factors (FF) developed locally generated substantial bias but performed better than the traditional FF (0.7). Overall, our results suggest that it is possible to develop accurate generic models to estimate commercial timber volume, and this study can serve as a guideline for forest managers or scientists interested in calibrating volumetric models in a cost-efficient way. Study Implications: This work provides useful information on volumetric modeling methods for Brazilian Amazon tropical forests. Most of the studies in the literature only investigate the classical modeling using regression models considering only boom metrics with or without bark, and, in this way, they provide incomplete and biased total knowledge and estimates for a given population. Therefore, detailed and accurate analyzes are crucial tools for decisionmaking. If the harvesting interventions are carried out without considering the most appropriate method to estimate the total wood stock, there may be damages or even extinction of some species, as has happened with other forest domains in Brazil and in other rainforest regions in the world. In this work, the results clearly show the importance of testing different methodologies and selecting the one best suited for a particular site, as well as carrying out techniques for the sustainable and correct management of the forest. Because the analysis procedures provide only information on how methodologies behave statistically, our results may contribute to a more refined analysis to be applied in the future in similar environments. Currently, the Brazilian forestry sector is looking for alternatives to obtain forest resources within the concept of sustainability. For the Brazilian Amazon tropical forest domain, it is extremely important to achieve a sustainable management of resources through forest management. Most studies in the literature investigate the management of tropical rainforest, whereas there is a lack of scientific information on the transition range for the cerrado. MenosAccurate estimates of commercial volume in tropical forests are key for the implementation of sustainable forest management plans. Because of the lack of local or generic volumetric equations, most forest managers and forestry services are still using traditional expansion factors (i.e., multiplication of the diameter by a given value) to estimate the volume of commercial tree species in the Amazon. Volumetric models were developed through a unique data set of 1,264 fallen trees fully measured in 150 sample plots located across a broad range of forests in Amapá, Brazil. Forest-specific volumetric models were developed and compared with a generic (i.e., across all forests) model and with published equations developed elsewhere in the Amazon. The generic equation performed well in all forest types and allowed precise predictions. The most efficient sampling design to develop volumetric models consists of measuring approximately 50 trees across four different size classes representing the whole population. The form factors (FF) developed locally generated substantial bias but performed better than the traditional FF (0.7). Overall, our results suggest that it is possible to develop accurate generic models to estimate commercial timber volume, and this study can serve as a guideline for forest managers or scientists interested in calibrating volumetric models in a cost-efficient way. Study Implications: This work provides useful information on volumetric modeling methods for Bra... Mostrar Tudo |
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Palavras-Chave: |
Brazilian Amazonia; Form factor; Generic equations; Manejo florestal. |
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Thesagro: |
Floresta Tropical. |
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Thesaurus Nal: |
Forest management. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219251/1/CPAF-AP-2020-Accurate-estimation-of-commercial.pdf
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Marc: |
LEADER 03941naa a2200313 a 4500
001 2128189
005 2021-03-31
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1093/forsci/fxaa032$2DOI
100 1 $aLIMA, R. B. de
245 $aAccurate estimation of commercial volume in tropical forests.$h[electronic resource]
260 $c2020
520 $aAccurate estimates of commercial volume in tropical forests are key for the implementation of sustainable forest management plans. Because of the lack of local or generic volumetric equations, most forest managers and forestry services are still using traditional expansion factors (i.e., multiplication of the diameter by a given value) to estimate the volume of commercial tree species in the Amazon. Volumetric models were developed through a unique data set of 1,264 fallen trees fully measured in 150 sample plots located across a broad range of forests in Amapá, Brazil. Forest-specific volumetric models were developed and compared with a generic (i.e., across all forests) model and with published equations developed elsewhere in the Amazon. The generic equation performed well in all forest types and allowed precise predictions. The most efficient sampling design to develop volumetric models consists of measuring approximately 50 trees across four different size classes representing the whole population. The form factors (FF) developed locally generated substantial bias but performed better than the traditional FF (0.7). Overall, our results suggest that it is possible to develop accurate generic models to estimate commercial timber volume, and this study can serve as a guideline for forest managers or scientists interested in calibrating volumetric models in a cost-efficient way. Study Implications: This work provides useful information on volumetric modeling methods for Brazilian Amazon tropical forests. Most of the studies in the literature only investigate the classical modeling using regression models considering only boom metrics with or without bark, and, in this way, they provide incomplete and biased total knowledge and estimates for a given population. Therefore, detailed and accurate analyzes are crucial tools for decisionmaking. If the harvesting interventions are carried out without considering the most appropriate method to estimate the total wood stock, there may be damages or even extinction of some species, as has happened with other forest domains in Brazil and in other rainforest regions in the world. In this work, the results clearly show the importance of testing different methodologies and selecting the one best suited for a particular site, as well as carrying out techniques for the sustainable and correct management of the forest. Because the analysis procedures provide only information on how methodologies behave statistically, our results may contribute to a more refined analysis to be applied in the future in similar environments. Currently, the Brazilian forestry sector is looking for alternatives to obtain forest resources within the concept of sustainability. For the Brazilian Amazon tropical forest domain, it is extremely important to achieve a sustainable management of resources through forest management. Most studies in the literature investigate the management of tropical rainforest, whereas there is a lack of scientific information on the transition range for the cerrado.
650 $aForest management
650 $aFloresta Tropical
653 $aBrazilian Amazonia
653 $aForm factor
653 $aGeneric equations
653 $aManejo florestal
700 1 $aRUTISHAUSER, E.
700 1 $aSILVA, J. A. A. da
700 1 $aGUEDES, M. C.
700 1 $aHERAULT, B.
700 1 $aOLIVEIRA, C. P. de
700 1 $aAPARÍCIO, P. da S.
700 1 $aSOTTA, E. D.
700 1 $aSILVA, D. A. S. da
700 1 $aFERREIRA, R. L. C.
773 $tForest Science, p. 1-8, July 2020.
Download
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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Biblioteca |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Acre. Para informações adicionais entre em contato com cpafac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
26/02/2013 |
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Data da última atualização: |
06/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
VASCONCELOS, S. S. de; FEARNSIDE, P. M.; GRAÇA, P. M. L. de A.; NOGUEIRA, E. M.; OLIVEIRA, L. C. de; FIGUEIREDO, E. O. |
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Afiliação: |
Sumaia Saldanha de Vasconcelos, Instituto Nacional de Pesquisas da Amazônia (Inpa); Philip Martin Fearnside, Instituto Nacional de Pesquisas da Amazônia (Inpa); Paulo Maurício de Lima de Alencastro Graça, Instituto Nacional de Pesquisas da Amazônia (Inpa); Euler Melo Nogueira, Instituto Nacional de Pesquisas da Amazônia (Inpa); LUIS CLAUDIO DE OLIVEIRA, CPAF-AC; EVANDRO ORFANO FIGUEIREDO, CPAF-AC. |
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Título: |
Forest fires in southwestern Brazilian Amazonia: estimates of area and potential carbon emissions. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Forest Ecology and Management, Amsterdam, v. 291, p. 199-208, Mar. 2013. |
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ISSN: |
0378-1127 |
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DOI: |
10.1016/j.foreco.2012.11.044 |
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Idioma: |
Inglês |
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Conteúdo: |
Areas affected by forest fires that occurred in 2005 were mapped in the municipalities of Boca do Acre and Lábrea (in the southern part of Brazil?s state of Amazonas) and estimates were made of the loss of biomass and carbon stock and the committed emissions from increased tree mortality due to fire. Fire scars observed on Landsat-5 TM satellite images from 2004 to 2006 were visually interpreted and digitized; over 865.6 km2 of forest affected by fire were mapped, the majority (2.9% of the total forest cover) concentrated along the southern edges of the municipalities, which border on the states of Rondônia and Acre. The greatest loss of biomass due to the increase in tree mortality was indicated by the survey made 4 years after the fires: 4.5 X 106 Mg total (above + below-ground) and 3.7 x 106 Mg (only above-ground). Consequently, 2.2 x 106 Mg C (total) and 1.8 x 106 Mg C (above-ground) of potential carbon emissions were committed from the initial burn of forest biomass and from trees killed by the fire. Emissions occur both through oxidation of dead biomass by decomposition or through combustion in subsequent fire events. Our results indicate that fires can affect extensive tracts of forest and can emit significant amounts of carbon to the atmosphere in periods of drought. Fire plays a significant role as a threat to the biological balance of the forest and causes loss of biomass and emission of greenhouse gases that have critical implications for the future of forests in the Amazon. MenosAreas affected by forest fires that occurred in 2005 were mapped in the municipalities of Boca do Acre and Lábrea (in the southern part of Brazil?s state of Amazonas) and estimates were made of the loss of biomass and carbon stock and the committed emissions from increased tree mortality due to fire. Fire scars observed on Landsat-5 TM satellite images from 2004 to 2006 were visually interpreted and digitized; over 865.6 km2 of forest affected by fire were mapped, the majority (2.9% of the total forest cover) concentrated along the southern edges of the municipalities, which border on the states of Rondônia and Acre. The greatest loss of biomass due to the increase in tree mortality was indicated by the survey made 4 years after the fires: 4.5 X 106 Mg total (above + below-ground) and 3.7 x 106 Mg (only above-ground). Consequently, 2.2 x 106 Mg C (total) and 1.8 x 106 Mg C (above-ground) of potential carbon emissions were committed from the initial burn of forest biomass and from trees killed by the fire. Emissions occur both through oxidation of dead biomass by decomposition or through combustion in subsequent fire events. Our results indicate that fires can affect extensive tracts of forest and can emit significant amounts of carbon to the atmosphere in periods of drought. Fire plays a significant role as a threat to the biological balance of the forest and causes loss of biomass and emission of greenhouse gases that have critical implications for the future of forests in ... Mostrar Tudo |
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Palavras-Chave: |
Biomasa; Bosques tropicales; Calentamiento global; Carbonización; Emisiones de gases de efecto invernadero; Estimación; Incendios forestales; Mapeamento; Mercados de carbono. |
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Thesagro: |
Biomassa; Carbono; Estimativa; Floresta tropical; Incêndio florestal; Perda. |
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Thesaurus NAL: |
Biomass; Carbon markets; Carbonization; Estimation; Forest fires; Global warming; Greenhouse gas emissions; Tropical forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02912naa a2200481 a 4500
001 1951099
005 2021-07-06
008 2013 bl uuuu u00u1 u #d
022 $a0378-1127
024 7 $a10.1016/j.foreco.2012.11.044$2DOI
100 1 $aVASCONCELOS, S. S. de
245 $aForest fires in southwestern Brazilian Amazonia$bestimates of area and potential carbon emissions.$h[electronic resource]
260 $c2013
520 $aAreas affected by forest fires that occurred in 2005 were mapped in the municipalities of Boca do Acre and Lábrea (in the southern part of Brazil?s state of Amazonas) and estimates were made of the loss of biomass and carbon stock and the committed emissions from increased tree mortality due to fire. Fire scars observed on Landsat-5 TM satellite images from 2004 to 2006 were visually interpreted and digitized; over 865.6 km2 of forest affected by fire were mapped, the majority (2.9% of the total forest cover) concentrated along the southern edges of the municipalities, which border on the states of Rondônia and Acre. The greatest loss of biomass due to the increase in tree mortality was indicated by the survey made 4 years after the fires: 4.5 X 106 Mg total (above + below-ground) and 3.7 x 106 Mg (only above-ground). Consequently, 2.2 x 106 Mg C (total) and 1.8 x 106 Mg C (above-ground) of potential carbon emissions were committed from the initial burn of forest biomass and from trees killed by the fire. Emissions occur both through oxidation of dead biomass by decomposition or through combustion in subsequent fire events. Our results indicate that fires can affect extensive tracts of forest and can emit significant amounts of carbon to the atmosphere in periods of drought. Fire plays a significant role as a threat to the biological balance of the forest and causes loss of biomass and emission of greenhouse gases that have critical implications for the future of forests in the Amazon.
650 $aBiomass
650 $aCarbon markets
650 $aCarbonization
650 $aEstimation
650 $aForest fires
650 $aGlobal warming
650 $aGreenhouse gas emissions
650 $aTropical forests
650 $aBiomassa
650 $aCarbono
650 $aEstimativa
650 $aFloresta tropical
650 $aIncêndio florestal
650 $aPerda
653 $aBiomasa
653 $aBosques tropicales
653 $aCalentamiento global
653 $aCarbonización
653 $aEmisiones de gases de efecto invernadero
653 $aEstimación
653 $aIncendios forestales
653 $aMapeamento
653 $aMercados de carbono
700 1 $aFEARNSIDE, P. M.
700 1 $aGRAÇA, P. M. L. de A.
700 1 $aNOGUEIRA, E. M.
700 1 $aOLIVEIRA, L. C. de
700 1 $aFIGUEIREDO, E. O.
773 $tForest Ecology and Management, Amsterdam$gv. 291, p. 199-208, Mar. 2013.
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