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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
26/06/2018 |
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Data da última atualização: |
28/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AVILA, A. L. de; SANDE, M. T. van der; DORMANN, C. F.; PEÑA-CLAROS, M.; POORTER, L.; FREITAS, L. J. M. de; RUSCHEL, A. R.; SILVA, J. N. M.; CARVALHO, J. O. P. de; BAUHUS, J. |
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Afiliação: |
Angela L. de Avila, University of Freiburg; Masha T. van der Sande, Wageningen University and Research; Carsten F. Dormann, University of Freiburg; Marielos Peña-Claros, Wageningen University and Research; Lourens Poorter, Wageningen University and Research; LUCAS JOSE MAZZEI DE FREITAS, CPATU; ADEMIR ROBERTO RUSCHEL, CPATU; José Natalino Macedo Silva, UFRA; João Olegário Pereira de Carvalho, UFRA; Jürgen Bauhus, University of Freiburg. |
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Título: |
Disturbance intensity is a stronger driver of biomass recovery than remaining tree-community attributes in a managed Amazonian forest. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Applied Ecology, v. 55, n. 4, p. 1647-1657, July 2018. |
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DOI: |
10.1111/1365-2664.13134 |
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Idioma: |
Inglês |
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Conteúdo: |
Forest recovery following management interventions is important to maintain ecosystem functioning and the provision of ecosystem services. It remains, however, largely unclear how above-ground biomass (AGB) recovery of species-rich tropical forests is affected by disturbance intensity and post-disturbance (remaining) tree-community attributes, following logging and thinning interventions. We investigated whether annual AGB increment (ΔAGB) decreases with management-related disturbance intensity (disturbance hypothesis), and increases with the diversity (niche-complementarity hypothesis) and the community-weighted mean (CWM) of acquisitive traits of dominant species (biomass-ratio hypothesis) in the remaining tree community. We analysed data from a long-term forest-management experiment in the Brazilian Amazon over two recovery periods: post-logging (1983?1989) and post-thinning (1995?2012). We computed the ΔAGB of surviving trees, recruit trees and of the total tree community. Disturbance intensity was quantified as basal area reduction and basal area remaining. Remaining diversity (taxonomic, functional and structural) and CWM of five functional traits linked to biomass productivity (specific leaf area, leaf nitrogen and phosphorous concentration, leaf toughness and wood density) were calculated for the post-intervention inventories. Predictors were related to response variables using multiple linear regressions and structural equation modelling. We found support for the disturbance hypothesis in both recovery periods. AGB increment of survivors and of the total tree community increased with basal area remaining, indicating the importance of remaining growing stock for biomass recovery. Conversely, AGB increment of recruit trees increased with basal area reduction because changes in forest structure increased resource availability for young trees. We did not find consistent support for the niche-complementarity and biomass-ratio hypotheses, possibly because of a high redundancy in these extremely species-rich forests Synthesis and applications. The intensity of disturbance through management, expressed as basal area reduction and basal area remaining, was consistently more important for explaining forest biomass recovery following harvesting and thinning than remaining diversity or trait composition. This points to the importance of controlling logging and thinning intensity in forests of the eastern Amazon. Given the high intervention intensities applied in this experiment, it is likely that low to moderate harvesting intensities permitted by the current legislation for the Brazilian Amazon (30 m³/ha) will not impair biomass recovery in these forests MenosForest recovery following management interventions is important to maintain ecosystem functioning and the provision of ecosystem services. It remains, however, largely unclear how above-ground biomass (AGB) recovery of species-rich tropical forests is affected by disturbance intensity and post-disturbance (remaining) tree-community attributes, following logging and thinning interventions. We investigated whether annual AGB increment (ΔAGB) decreases with management-related disturbance intensity (disturbance hypothesis), and increases with the diversity (niche-complementarity hypothesis) and the community-weighted mean (CWM) of acquisitive traits of dominant species (biomass-ratio hypothesis) in the remaining tree community. We analysed data from a long-term forest-management experiment in the Brazilian Amazon over two recovery periods: post-logging (1983?1989) and post-thinning (1995?2012). We computed the ΔAGB of surviving trees, recruit trees and of the total tree community. Disturbance intensity was quantified as basal area reduction and basal area remaining. Remaining diversity (taxonomic, functional and structural) and CWM of five functional traits linked to biomass productivity (specific leaf area, leaf nitrogen and phosphorous concentration, leaf toughness and wood density) were calculated for the post-intervention inventories. Predictors were related to response variables using multiple linear regressions and structural equation modelling. We found support ... Mostrar Tudo |
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Thesagro: |
Biomassa; Floresta. |
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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/179053/1/1365-2664.13134.pdf
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Marc: |
LEADER 03548naa a2200265 a 4500
001 2092827
005 2018-06-28
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/1365-2664.13134$2DOI
100 1 $aAVILA, A. L. de
245 $aDisturbance intensity is a stronger driver of biomass recovery than remaining tree-community attributes in a managed Amazonian forest.$h[electronic resource]
260 $c2018
520 $aForest recovery following management interventions is important to maintain ecosystem functioning and the provision of ecosystem services. It remains, however, largely unclear how above-ground biomass (AGB) recovery of species-rich tropical forests is affected by disturbance intensity and post-disturbance (remaining) tree-community attributes, following logging and thinning interventions. We investigated whether annual AGB increment (ΔAGB) decreases with management-related disturbance intensity (disturbance hypothesis), and increases with the diversity (niche-complementarity hypothesis) and the community-weighted mean (CWM) of acquisitive traits of dominant species (biomass-ratio hypothesis) in the remaining tree community. We analysed data from a long-term forest-management experiment in the Brazilian Amazon over two recovery periods: post-logging (1983?1989) and post-thinning (1995?2012). We computed the ΔAGB of surviving trees, recruit trees and of the total tree community. Disturbance intensity was quantified as basal area reduction and basal area remaining. Remaining diversity (taxonomic, functional and structural) and CWM of five functional traits linked to biomass productivity (specific leaf area, leaf nitrogen and phosphorous concentration, leaf toughness and wood density) were calculated for the post-intervention inventories. Predictors were related to response variables using multiple linear regressions and structural equation modelling. We found support for the disturbance hypothesis in both recovery periods. AGB increment of survivors and of the total tree community increased with basal area remaining, indicating the importance of remaining growing stock for biomass recovery. Conversely, AGB increment of recruit trees increased with basal area reduction because changes in forest structure increased resource availability for young trees. We did not find consistent support for the niche-complementarity and biomass-ratio hypotheses, possibly because of a high redundancy in these extremely species-rich forests Synthesis and applications. The intensity of disturbance through management, expressed as basal area reduction and basal area remaining, was consistently more important for explaining forest biomass recovery following harvesting and thinning than remaining diversity or trait composition. This points to the importance of controlling logging and thinning intensity in forests of the eastern Amazon. Given the high intervention intensities applied in this experiment, it is likely that low to moderate harvesting intensities permitted by the current legislation for the Brazilian Amazon (30 m³/ha) will not impair biomass recovery in these forests
650 $aBiomassa
650 $aFloresta
700 1 $aSANDE, M. T. van der
700 1 $aDORMANN, C. F.
700 1 $aPEÑA-CLAROS, M.
700 1 $aPOORTER, L.
700 1 $aFREITAS, L. J. M. de
700 1 $aRUSCHEL, A. R.
700 1 $aSILVA, J. N. M.
700 1 $aCARVALHO, J. O. P. de
700 1 $aBAUHUS, J.
773 $tJournal of Applied Ecology$gv. 55, n. 4, p. 1647-1657, July 2018.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
04/11/2020 |
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Data da última atualização: |
08/02/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
MATRANGOLO, W. J. R.; CIOTOLA, J. L.; FRANÇA, F. C. T.; MACHADO, A. T.; TEIXEIRA, F. F.; FREITAS, F. O.; GADELHA, E. G. |
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Afiliação: |
WALTER JOSE RODRIGUES MATRANGOLO, CNPMS; José L. Ciotola, Emater-MG; Fernando, C. T. França, Emater-MG; ALTAIR TOLEDO MACHADO, CPAC; FLAVIA FRANCA TEIXEIRA, CNPMS; FABIO OLIVEIRA FREITAS, Cenargen; Edmar G. Gadelha, Emater-MG. |
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Título: |
Produção de sementes de milho crioulo em Juvenília, MG. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Cadernos de Agroecologia, v. 15, n. 2, 2020. |
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Idioma: |
Português |
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Notas: |
Edição dos Anais do XI Congresso Brasileiro de Agroecologia, São Cristóvão, Sergipe, 2019. |
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Conteúdo: |
A distribuição de sementes por meio das políticas, programas e projetos governamentais é geralmente realizada por órgãos públicos, que as adquirem no mercado. As sementes distribuídas são as de menor custo financeiro, seguindo as normas da Lei Federal no. 8666: não precisam ter vínculo com as comunidades beneficiadas. O presente trabalho descreve os desafios para a multiplicação em sistema agroecológico do milho crioulo STR Varzelândia em 1,5 ha, em Juvenília, MG, onde foram produzidos 4.000 kg. Políticas de combate à pobreza e de conservação da agrobiodiversidade devem convergir de forma contextualizada com o território onde são aplicadas para que contribuam efetivamente com a melhoria das condições de vida dos povos e comunidades tradicionais, sem suprimir a sociobiodiversidade. STR Varzelândia, apesar de apresentar características adaptativas a realidade dos agricultores, apresenta baixa produtividade, que poderá ser incrementada por processos de melhoramento participativo |
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Palavras-Chave: |
Agroecologia; Erosão cultura; Erosão genética. |
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Thesagro: |
Políticas Públicas. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/217463/1/Producao-sementes.pdf
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Marc: |
LEADER 01785nam a2200241 a 4500
001 2126289
005 2021-02-08
008 2020 bl uuuu u00u1 u #d
100 1 $aMATRANGOLO, W. J. R.
245 $aProdução de sementes de milho crioulo em Juvenília, MG.$h[electronic resource]
260 $aCadernos de Agroecologia, v. 15, n. 2$c2020
500 $aEdição dos Anais do XI Congresso Brasileiro de Agroecologia, São Cristóvão, Sergipe, 2019.
520 $aA distribuição de sementes por meio das políticas, programas e projetos governamentais é geralmente realizada por órgãos públicos, que as adquirem no mercado. As sementes distribuídas são as de menor custo financeiro, seguindo as normas da Lei Federal no. 8666: não precisam ter vínculo com as comunidades beneficiadas. O presente trabalho descreve os desafios para a multiplicação em sistema agroecológico do milho crioulo STR Varzelândia em 1,5 ha, em Juvenília, MG, onde foram produzidos 4.000 kg. Políticas de combate à pobreza e de conservação da agrobiodiversidade devem convergir de forma contextualizada com o território onde são aplicadas para que contribuam efetivamente com a melhoria das condições de vida dos povos e comunidades tradicionais, sem suprimir a sociobiodiversidade. STR Varzelândia, apesar de apresentar características adaptativas a realidade dos agricultores, apresenta baixa produtividade, que poderá ser incrementada por processos de melhoramento participativo
650 $aPolíticas Públicas
653 $aAgroecologia
653 $aErosão cultura
653 $aErosão genética
700 1 $aCIOTOLA, J. L.
700 1 $aFRANÇA, F. C. T.
700 1 $aMACHADO, A. T.
700 1 $aTEIXEIRA, F. F.
700 1 $aFREITAS, F. O.
700 1 $aGADELHA, E. G.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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