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| 10. |  | AUAD, A. M.; CARVALHO, C. A. de; SILVA, D. M. da; DERESZ, F. Flutuação populacional de cigarrinhas-das-pastagens em braquiária e capim-elefante. Pesquisa Agropecuária Brasileira, Brasílila, DF, v. 44, n. 9, p. 1205-1208, 2009.| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Gado de Leite; Embrapa Unidades Centrais. |
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| 14. | | MADEIRA, N.; DIAS, T.; CASTRO, L. R. de; CASTRO, L. C. de; SILVA, D. M. da. Catálogo de hortaliças não convencionais: diálogo entre banco ativo e agricultor. In. CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 3., 2014, Santos. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2014. Resumo. 754. 1 CD-ROM.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 15. | | CARVALHO, C. A. de; AUAD, A. M.; SILVA, D. M. da; BATISTA, E. S. de P. Constância, riqueza e sazonalidade de Coleópteros coletados em sistema silvipastoril, no município de Coronel Pacheco-MG. In: CONGRESSO DE PÓS-GRADUAÇÃO DA UFLA, 17., 2008, Lavras, MG. Anais... Lavras: UFLA, 2008. p. 666-671.| Biblioteca(s): Embrapa Gado de Leite. |
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| 20. | | SILVA, D. M. da; ALMEIDA, A. S. de; GUIDUCCI FILHO, E.; CAPORAL, F. R. Extensão rural. In: HENZ, G. P.; ALCÂNTARA, F. A. de; RESENDE, F. V. (Ed). Produção orgânica de hortaliças: o produtor pergunta, a Embrapa responde. Brasília, DF: Embrapa Informações Técnologicas, 2007. p. 285-294. (Coleção 500 perguntas, 500 respostas).| Biblioteca(s): Embrapa Hortaliças. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
22/08/2006 |
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Data da última atualização: |
28/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
KELLER, M.; PALACE, M.; ASNER, G. P.; PEREIRA JUNIOR, R.; SILVA, J. N. M. |
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Afiliação: |
Michael Keller, Complex Systems Research Center Morse Hall University of New Hampshire Durham / USDA; Michael Palace, Complex Systems Research Center Morse Hall University of New Hampshire Durham; Gregory P. Asner, Stanford University; RODRIGO PEREIRA JUNIOR, INAM; JOSÉ NATALINO MACEDO SILVA, CPATU. |
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Título: |
Coarse woody debris in undisturbed and logged forests in the eastern brazilian Amazon. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Global Change Biology, v. 10, n. 5, p. 784-795, May 2004. |
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DOI: |
10.1111/j.1529-8817.2003.00770.x |
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Idioma: |
Inglês |
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Conteúdo: |
Coarse woody debris (CWD) is an important component of the carbon cycle in tropical forests. We measured the volume and density of fallen CWD at two sites, Cauaxi and Tapajós in the Eastern Amazon. At both sites we studied undisturbed forests (UFs) and logged forests 1 year after harvest. Conventional logging (CL) and reduced impact logging (RIL) were used for management on areas where the geometric volumes of logs harvested was about 25?30 m3 ha?1. Density for five classes of fallen CWD for large material (>10 cm diameter) ranged from 0.71 to 0.28 Mg m?3 depending upon the degree of decomposition. Density of wood within large fallen logs varied with position relative to the ground and with distance from the center of the log. Densities for materials with diameters from 2 to 5 and 5 to 10 cm were 0.36 and 0.45 Mg m?3, respectively. The average mass (±SE) of fallen CWD at Cauaxi was 55.2 (4.7), 74.7 (0.6), and 107.8 (10.5) Mg ha?1 for duplicate UF, RIL, and CL sites, respectively. At Tapajós, the average mass of fallen CWD was 50.7 (1.1) Mg ha?1 for UF and 76.2 (10.2) Mg ha?1 for RIL for duplicate sites compared with 282 Mg ha?1 for live aboveground biomass. Small- and medium-sized material (<10 cm dia.) accounted for 8?18% of the total fallen CWD mass. The large amount of fallen CWD at these UF sites relative to standing aboveground biomass suggests either that the forests have recently been subjected to a pulse of high mortality or that they normally suffer a high mortality rate in the range of 0.03 per year. Accounting for background CWD in UF, CL management produced 2.7 times as much CWD as RIL management. Excess CWD at logging sites would generate a substantial CO2 emission given the high rates of decay in moist tropical forests MenosCoarse woody debris (CWD) is an important component of the carbon cycle in tropical forests. We measured the volume and density of fallen CWD at two sites, Cauaxi and Tapajós in the Eastern Amazon. At both sites we studied undisturbed forests (UFs) and logged forests 1 year after harvest. Conventional logging (CL) and reduced impact logging (RIL) were used for management on areas where the geometric volumes of logs harvested was about 25?30 m3 ha?1. Density for five classes of fallen CWD for large material (>10 cm diameter) ranged from 0.71 to 0.28 Mg m?3 depending upon the degree of decomposition. Density of wood within large fallen logs varied with position relative to the ground and with distance from the center of the log. Densities for materials with diameters from 2 to 5 and 5 to 10 cm were 0.36 and 0.45 Mg m?3, respectively. The average mass (±SE) of fallen CWD at Cauaxi was 55.2 (4.7), 74.7 (0.6), and 107.8 (10.5) Mg ha?1 for duplicate UF, RIL, and CL sites, respectively. At Tapajós, the average mass of fallen CWD was 50.7 (1.1) Mg ha?1 for UF and 76.2 (10.2) Mg ha?1 for RIL for duplicate sites compared with 282 Mg ha?1 for live aboveground biomass. Small- and medium-sized material (<10 cm dia.) accounted for 8?18% of the total fallen CWD mass. The large amount of fallen CWD at these UF sites relative to standing aboveground biomass suggests either that the forests have recently been subjected to a pulse of high mortality or that they normally suffer a high mortality... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Extração da Madeira; Floresta Tropical. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
|
Marc: |
LEADER 02453naa a2200229 a 4500
001 1408532
005 2022-11-28
008 2004 bl uuuu u00u1 u #d
024 7 $a10.1111/j.1529-8817.2003.00770.x$2DOI
100 1 $aKELLER, M.
245 $aCoarse woody debris in undisturbed and logged forests in the eastern brazilian Amazon.$h[electronic resource]
260 $c2004
520 $aCoarse woody debris (CWD) is an important component of the carbon cycle in tropical forests. We measured the volume and density of fallen CWD at two sites, Cauaxi and Tapajós in the Eastern Amazon. At both sites we studied undisturbed forests (UFs) and logged forests 1 year after harvest. Conventional logging (CL) and reduced impact logging (RIL) were used for management on areas where the geometric volumes of logs harvested was about 25?30 m3 ha?1. Density for five classes of fallen CWD for large material (>10 cm diameter) ranged from 0.71 to 0.28 Mg m?3 depending upon the degree of decomposition. Density of wood within large fallen logs varied with position relative to the ground and with distance from the center of the log. Densities for materials with diameters from 2 to 5 and 5 to 10 cm were 0.36 and 0.45 Mg m?3, respectively. The average mass (±SE) of fallen CWD at Cauaxi was 55.2 (4.7), 74.7 (0.6), and 107.8 (10.5) Mg ha?1 for duplicate UF, RIL, and CL sites, respectively. At Tapajós, the average mass of fallen CWD was 50.7 (1.1) Mg ha?1 for UF and 76.2 (10.2) Mg ha?1 for RIL for duplicate sites compared with 282 Mg ha?1 for live aboveground biomass. Small- and medium-sized material (<10 cm dia.) accounted for 8?18% of the total fallen CWD mass. The large amount of fallen CWD at these UF sites relative to standing aboveground biomass suggests either that the forests have recently been subjected to a pulse of high mortality or that they normally suffer a high mortality rate in the range of 0.03 per year. Accounting for background CWD in UF, CL management produced 2.7 times as much CWD as RIL management. Excess CWD at logging sites would generate a substantial CO2 emission given the high rates of decay in moist tropical forests
650 $aAmazonia
650 $aExtração da Madeira
650 $aFloresta Tropical
653 $aBrasil
700 1 $aPALACE, M.
700 1 $aASNER, G. P.
700 1 $aPEREIRA JUNIOR, R.
700 1 $aSILVA, J. N. M.
773 $tGlobal Change Biology$gv. 10, n. 5, p. 784-795, May 2004.
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