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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
08/07/2005 |
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Data da última atualização: |
13/02/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BAKER, T. R.; PHILLIPS, O. L.; MALHI, Y.; ALMEIDA, S.; ARROYO, L.; DI FIORE, A.; ERWIN, T.; HIGUCHI, N.; KILLEEN, T. J.; LAURENCE, S. G.; LAURENCE, W. F.; LEWIS, S. L.; MONTEAGUDO, A.; NEILL, D. A.; NÚNEZ VARGAS, P.; PITMAN, N. C. A.; SILVA, J. N. M.; VÁSQUEZ MARTÍNEZ, R. |
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Afiliação: |
TIMOTHY R. BAKER, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE; OLIVER L. PHILLIPS, UNIVERSITY OF LEEDS; YADVINDER MALHI, UNIVERSITY OF EDINBURGH; SAMUEL ALMEIDA, MUSEU PARAENSE EMILIO GOELDI; LUZMILA ARROYO, MUSEO NOEL KEMPFF MERCADO; ANTHONY DI FIORE, NEW YORK UNIVERSITY; TERRY ERWIN, SMITHSONIAN INSTITUTION; NIRO HIGUCHI, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; TIMOTHY J. KILLEEN, CENTER FOR APPLIED BIODIVERSITY SCIENCE, CONSERVATION INTERNATIONAL; SUSAN G. LAURANCE, SMITHSONIAN TROPICAL RESEARCH INSTITUTE; WILLIAM F. LAURANCE, SMITHSONIAN TROPICAL RESEARCH INSTITUTE; SIMON L. LEWIS, UNIVERSITY OF LEEDS; ABEL MONTEAGUDO, UNIVERSIDAD NACIONAL SAN ANTONIO ABAD DEL CUSCO; DAVID A. NEILL, MISSOURI BOTANICAL GARDEN; PERCY NÚÑEZ VARGAS, UNIVERSIDAD NACIONAL SAN ANTONIO ABAD DEL CUSCO; NIGEL C. A. PITMAN, DUKE UNIVERSITY; JOSE NATALINO MACEDO SILVA, CPATU; RODOLFO VÁSQUEZ MARTÍNEZ, JARDIN BOTANICO DE MISSOURI. |
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Título: |
Increasing biomass in Amazonian forest plots. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Philosophical Transactions of the Royal Society of London. B, v. 359, n. 1443, p. 353-365, Mar. 2004. |
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Descrição Física: |
il. |
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DOI: |
https://doi.org/10.1098/rstb.2003.1422 |
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Idioma: |
Inglês |
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Conteúdo: |
A previous study by Phillips et al. of changes in the biomass of permanent sample plots in Amazonian forests was used to infer the presence of a regional carbon sink. However, these results generated a vigorous debate about sampling and methodological issues. Therefore we present a new analysis of biomass change in old?growth Amazonian forest plots using updated inventory data. We find that across 59 sites, the above?ground dry biomass in trees that are more than 10 cm in diameter (AGB) has increased since plot establishment by 1.22 ± 0.43 Mg per hectare per year (ha?1 yr?1), where 1 ha = 104 m2), or 0.98 ± 0.38 Mg ha?1 yr?1 if individual plot values are weighted by the number of hectare years of monitoring. This significant increase is neither confounded by spatial or temporal variation in wood specific gravity, nor dependent on the allometric equation used to estimate AGB. The conclusion is also robust to uncertainty about diameter measurements for problematic trees: for 34 plots in western Amazon forests a significant increase in AGB is found even with a conservative assumption of zero growth for all trees where diameter measurements were made using optical methods and/or growth rates needed to be estimated following fieldwork. Overall, our results suggest a slightly greater rate of net stand?level change than was reported by Phillips et al. Considering the spatial and temporal scale of sampling and associated studies showing increases in forest growth and stem turnover, the results presented here suggest that the total biomass of these plots has on average increased and that there has been a regional?scale carbon sink in old?growth Amazonian forests during the previous two decades. MenosA previous study by Phillips et al. of changes in the biomass of permanent sample plots in Amazonian forests was used to infer the presence of a regional carbon sink. However, these results generated a vigorous debate about sampling and methodological issues. Therefore we present a new analysis of biomass change in old?growth Amazonian forest plots using updated inventory data. We find that across 59 sites, the above?ground dry biomass in trees that are more than 10 cm in diameter (AGB) has increased since plot establishment by 1.22 ± 0.43 Mg per hectare per year (ha?1 yr?1), where 1 ha = 104 m2), or 0.98 ± 0.38 Mg ha?1 yr?1 if individual plot values are weighted by the number of hectare years of monitoring. This significant increase is neither confounded by spatial or temporal variation in wood specific gravity, nor dependent on the allometric equation used to estimate AGB. The conclusion is also robust to uncertainty about diameter measurements for problematic trees: for 34 plots in western Amazon forests a significant increase in AGB is found even with a conservative assumption of zero growth for all trees where diameter measurements were made using optical methods and/or growth rates needed to be estimated following fieldwork. Overall, our results suggest a slightly greater rate of net stand?level change than was reported by Phillips et al. Considering the spatial and temporal scale of sampling and associated studies showing increases in forest growth and stem turnover, ... Mostrar Tudo |
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Thesagro: |
Biomassa; Carbono; 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: |
null
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| 19. |  | MENDES, D. P.; MENDES, M. A. S.; URBEN, A. F.; OLIVEIRA, A. S. Alternaria chrysanthemi interceptado em crisântemo pela quarentena de pós-entrada. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 8., 2003, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2003. p. 129.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
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| Registros recuperados : 49 | |
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