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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. |
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Registro Completo |
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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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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 |
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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
18/02/2011 |
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Data da última atualização: |
07/07/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SETOTAW, T. A.; CAIXETA, E. T.; PENA, G F.; ZAMBOLIM, E. M.; PEREIRA, A. A. |
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Afiliação: |
TESFAHUN ALEMU SETOTAW, Universidade Federal de Viçosa; EVELINE TEIXEIRA CAIXETA, SAPC; GULHERME FERREIRA PENA, Universidade Federal de Voçosa; EUNIZE MACIEL ZAMBOLIM, Universidade Federal de Viçosa; ANTONIO ALVES PEREIRA, EPAMIG. |
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Título: |
Breeding potential and genetic diversity of "híbrido do timor" coffee evaluated by molecular markers. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
CROP BREEDING AND APPLIED BIOTECHNOLOGY, v. 10, p. 289-304. 2010. |
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Páginas: |
289-304 |
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Idioma: |
Inglês |
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Conteúdo: |
AFLP, RAPD and SSR molecular markers were used to study the genetic diversity and genetic structure of the Híbrido de Timor germplasm. The principal coordinate analysis, UPGMA cluster analysis based on genetic dissimilarity of Jaccard, Bayesian model-based cluster analysis, percentage of polymorphic loci, Shannon?s information index and Nei gene diversity were employed to assess the genetic diversity. The analyses demonstrated a high genetic diversity among Híbrido de Timor accessions. UPGMA and Bayesian cluster analyses grouped the accessions into three clusters. The genetic structure of Híbrido de Timor is reported. The management of Híbrido de Timor germplasm variability and its potential use in breedin programs are discussed. |
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Palavras-Chave: |
Bayesian analysis; Coffee breeding; DNA markers; Principal coordinate analysis; Rust resistance. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/29346/1/Breeding-potential.pdf
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Marc: |
LEADER 01475naa a2200241 a 4500
001 1880496
005 2011-07-07
008 2010 bl uuuu u00u1 u #d
100 1 $aSETOTAW, T. A.
245 $aBreeding potential and genetic diversity of "híbrido do timor" coffee evaluated by molecular markers.$h[electronic resource]
260 $c2010
300 $a289-304
520 $aAFLP, RAPD and SSR molecular markers were used to study the genetic diversity and genetic structure of the Híbrido de Timor germplasm. The principal coordinate analysis, UPGMA cluster analysis based on genetic dissimilarity of Jaccard, Bayesian model-based cluster analysis, percentage of polymorphic loci, Shannon?s information index and Nei gene diversity were employed to assess the genetic diversity. The analyses demonstrated a high genetic diversity among Híbrido de Timor accessions. UPGMA and Bayesian cluster analyses grouped the accessions into three clusters. The genetic structure of Híbrido de Timor is reported. The management of Híbrido de Timor germplasm variability and its potential use in breedin programs are discussed.
653 $aBayesian analysis
653 $aCoffee breeding
653 $aDNA markers
653 $aPrincipal coordinate analysis
653 $aRust resistance
700 1 $aCAIXETA, E. T.
700 1 $aPENA, G F.
700 1 $aZAMBOLIM, E. M.
700 1 $aPEREIRA, A. A.
773 $tCROP BREEDING AND APPLIED BIOTECHNOLOGY$gv. 10, p. 289-304. 2010.
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