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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
17/08/2006 |
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Data da última atualização: |
08/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MALHI, Y.; BAKER, T. R.; PHILLIPS, O. L.; ALMEIDA, S.; ALVAREZ, E.; ARROYO, L.; CHAVE, J.; CZIMCZIK, C. I.; DI FIORE, A.; HIGUCHI, N.; KILLEEN, T. J.; LAURANCE, S. G.; LAURANCE, W. F.; LEWIS, S. L.; MONTOYA, L. M. M.; MONTEAGUDO, A.; NEILL, D. A.; VARGAS, P. N.; PATIÑO, S.; PITMAN, N. C. A.; QUESADA, C. A.; SALOMÃO, R.; SILVA, J. N. M.; LEZAMA, A. T.; MARTÍNEZ, R. V.; TERBORGH, J.; VINCETI, B.; LLOYD, J. |
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Afiliação: |
YADVINDER MALHI, UNIVERSITY OF EDINBURGH; TIMOTHY R. BAKER, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE; OLIVER L. PHILLIPS, UNIVERSITY OF LEEDS; SAMUEL ALMEIDA, MUSEU PARAENSE EMILIO GOELDI; ESTEBAN ALVAREZ, INTERCONEXIÓN ELÉCTRICA S.A.; LUZMILLA ARROYO, MUSEO NOEL KEMPFF MERCADO; JEROME CHAVE, CNRS/UPS; CLAUDIA I. CZIMCZIK, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE; ANTHONY DI FIORE, NEW YORK UNIVERSITY; NIRO HIGUCHI, INSTITITO NATIONAL DE PESQUISAS AMAZÔNICAS; 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; LINA MARÍA MERCADO MONTOYA, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE; ABEL MONTEAGUDO, UNIVERSIDAD NACIONAL SAN ANTONIO ABAD DEL CUSCO; DAVID A. NEILL, FUNDACION JATUN SACHA; PERCY NÚÑEZ VARGAS, UNIVERSIDAD NACIONAL SAN ANTONIO ABAD DEL CUSCO; SANDRA PATIÑO, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE; NIGEL C.A. PITMAN, DUKE UNIVERSITY; CARLOS ALBERTO QUESADA, UNIVERSIDADE DE BRASÍLIA; RAFAEL SALOMÃO, MUSEU PARAENSE EMILIO GOELDI; JOSÉ NATALINO MACÊDO SILVA, Embrapa Amazônia Oriental; ARMANDO TORRES LEZAMA, UNIVERSIDAD DE LOS ANDES; RODOLFO VÁSQUEZ MARTÍNEZ, JARDIN BOTANICO DE MISSOURI; JOHN TERBORGH, DUKE UNIVERSITY; BARBARA VINCETI, UNIVERSITY OF EDINBURGH; JON LLOYD, MAX-PLANCK-INSTITUT FÜR BIOGEOCHEMIE. |
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Título: |
The above-ground coarse wood productivity of 104 neotropical forest plots. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Global Change Biology, v. 10, n. 5, p. 563-591, 2004. |
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DOI: |
https://doi.org/10.1111/j.1529-8817.2003.00778.x |
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Idioma: |
Inglês |
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Conteúdo: |
The net primary production of tropical forests and its partitioning between long-lived carbon pools (wood) and shorter-lived pools (leaves, fine roots) are of considerable importance in the global carbon cycle. However, these terms have only been studied at a handful of field sites, and with no consistent calculation methodology. Here we calculate above-ground coarse wood carbon productivity for 104 forest plots in lowland New World humid tropical forests, using a consistent calculation methodology that incorporates corrections for spatial variations in tree-size distributions and wood density, and for census interval length. Mean wood density is found to be lower in more productive forests. We estimate that above-ground coarse wood productivity varies by more than a factor of three (between 1.5 and 5.5 Mg C ha−1 a−1) across the Neotropical plots, with a mean value of 3.1 Mg C ha−1 a−1. There appear to be no obvious relationships between wood productivity and rainfall, dry season length or sunshine, but there is some hint of increased productivity at lower temperatures. There is, however, also strong evidence for a positive relationship between wood productivity and soil fertility. Fertile soils tend to become more common towards the Andes and at slightly higher than average elevations, so the apparent temperature/productivity relationship is probably not a direct one. Coarse wood productivity accounts for only a fraction of overall tropical forest net primary productivity, but the available data indicate that it is approximately proportional to total above-ground productivity. We speculate that the large variation in wood productivity is unlikely to directly imply an equivalent variation in gross primary production. Instead a shifting balance in carbon allocation between respiration, wood carbon and fine root production seems the more likely explanation. MenosThe net primary production of tropical forests and its partitioning between long-lived carbon pools (wood) and shorter-lived pools (leaves, fine roots) are of considerable importance in the global carbon cycle. However, these terms have only been studied at a handful of field sites, and with no consistent calculation methodology. Here we calculate above-ground coarse wood carbon productivity for 104 forest plots in lowland New World humid tropical forests, using a consistent calculation methodology that incorporates corrections for spatial variations in tree-size distributions and wood density, and for census interval length. Mean wood density is found to be lower in more productive forests. We estimate that above-ground coarse wood productivity varies by more than a factor of three (between 1.5 and 5.5 Mg C ha−1 a−1) across the Neotropical plots, with a mean value of 3.1 Mg C ha−1 a−1. There appear to be no obvious relationships between wood productivity and rainfall, dry season length or sunshine, but there is some hint of increased productivity at lower temperatures. There is, however, also strong evidence for a positive relationship between wood productivity and soil fertility. Fertile soils tend to become more common towards the Andes and at slightly higher than average elevations, so the apparent temperature/productivity relationship is probably not a direct one. Coarse wood productivity accounts for only a fraction of overall tropical forest net primary productivity, ... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Produção de madeira. |
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Thesagro: |
Carbono; Fertilidade do Solo; Floresta Tropical; Produtividade. |
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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 03344naa a2200541 a 4500
001 1407947
005 2022-11-08
008 2004 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/j.1529-8817.2003.00778.x$2DOI
100 1 $aMALHI, Y.
245 $aThe above-ground coarse wood productivity of 104 neotropical forest plots.
260 $c2004
520 $aThe net primary production of tropical forests and its partitioning between long-lived carbon pools (wood) and shorter-lived pools (leaves, fine roots) are of considerable importance in the global carbon cycle. However, these terms have only been studied at a handful of field sites, and with no consistent calculation methodology. Here we calculate above-ground coarse wood carbon productivity for 104 forest plots in lowland New World humid tropical forests, using a consistent calculation methodology that incorporates corrections for spatial variations in tree-size distributions and wood density, and for census interval length. Mean wood density is found to be lower in more productive forests. We estimate that above-ground coarse wood productivity varies by more than a factor of three (between 1.5 and 5.5 Mg C ha−1 a−1) across the Neotropical plots, with a mean value of 3.1 Mg C ha−1 a−1. There appear to be no obvious relationships between wood productivity and rainfall, dry season length or sunshine, but there is some hint of increased productivity at lower temperatures. There is, however, also strong evidence for a positive relationship between wood productivity and soil fertility. Fertile soils tend to become more common towards the Andes and at slightly higher than average elevations, so the apparent temperature/productivity relationship is probably not a direct one. Coarse wood productivity accounts for only a fraction of overall tropical forest net primary productivity, but the available data indicate that it is approximately proportional to total above-ground productivity. We speculate that the large variation in wood productivity is unlikely to directly imply an equivalent variation in gross primary production. Instead a shifting balance in carbon allocation between respiration, wood carbon and fine root production seems the more likely explanation.
650 $aAmazonia
650 $aCarbono
650 $aFertilidade do Solo
650 $aFloresta Tropical
650 $aProdutividade
653 $aBrasil
653 $aProdução de madeira
700 1 $aBAKER, T. R.
700 1 $aPHILLIPS, O. L.
700 1 $aALMEIDA, S.
700 1 $aALVAREZ, E.
700 1 $aARROYO, L.
700 1 $aCHAVE, J.
700 1 $aCZIMCZIK, C. I.
700 1 $aDI FIORE, A.
700 1 $aHIGUCHI, N.
700 1 $aKILLEEN, T. J.
700 1 $aLAURANCE, S. G.
700 1 $aLAURANCE, W. F.
700 1 $aLEWIS, S. L.
700 1 $aMONTOYA, L. M. M.
700 1 $aMONTEAGUDO, A.
700 1 $aNEILL, D. A.
700 1 $aVARGAS, P. N.
700 1 $aPATIÑO, S.
700 1 $aPITMAN, N. C. A.
700 1 $aQUESADA, C. A.
700 1 $aSALOMÃO, R.
700 1 $aSILVA, J. N. M.
700 1 $aLEZAMA, A. T.
700 1 $aMARTÍNEZ, R. V.
700 1 $aTERBORGH, J.
700 1 $aVINCETI, B.
700 1 $aLLOYD, J.
773 $tGlobal Change Biology$gv. 10, n. 5, p. 563-591, 2004.
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
12/01/2009 |
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Data da última atualização: |
06/04/2022 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
MCINERNEV, R.; STUART, J.; NOVOTNY, E. H.; HAYES, M. H. B.; YOUNG, K. |
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Afiliação: |
RAYMOND MCINERNEV, UNIVERSITY OF LIMERICK; JOHN STUART, WBB MINERALS; ETELVINO HENRIQUE NOVOTNY, CNPS; MICHAEL HILARY B. HAYES, UNIVERSITY OF LIMERICK; KEVIN YOUNG, WBB MINERALS. |
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Título: |
Extraction and characterization of organic fractions isolated from a China Ball Clay quarried in Devon Sout West England. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 2, p. 567-570. |
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Idioma: |
Inglês |
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Conteúdo: |
China Ball clay has been used for centuries in the tiling and pottery-ware industry. Because it is much finer than the other components in the casting slip the ball clay dominates the particle-particle interactions. Therefore, the ball-clays give the cast its plasticity and cohesion. The clay under investigation is a dark slightly sandy china ball (DSSCB) clay with a high content of finely divided kaolinite and is mixed with other substances for casting. Because of its surface area properties and its associated organic matter it has an important influence on the cohesiveness and visco-elastic properties of the clay bodies used in manufacturing pottery ware. The fine particles in the ball clays have an important influence on the rheology of the wholebody, and stabilise the flow and casting properties of the slip. A number of analytical procedures have been used in this study in order to gain a better understanding of the clays and their associated organic materials. Identification of the amount and nature of the active organic fraction and of its mode of action is important. The work described here is part of a larger project that investigates the chemical properties and compositions of the clay and lignite materials, and the nature of clay-humic complexes and of lignite materials in clay and lignite deposits. |
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Palavras-Chave: |
China Ball Clay; humic; NMR; organic fraction. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/334712/1/Extraction-and-characterization-of-organic-fractions-isolated-2008.pdf
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Marc: |
LEADER 02166nam a2200205 a 4500
001 1334712
005 2022-04-06
008 2008 bl uuuu u00u1 u #d
100 1 $aMCINERNEV, R.
245 $aExtraction and characterization of organic fractions isolated from a China Ball Clay quarried in Devon Sout West England.$h[electronic resource]
260 $aIn: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 2, p. 567-570.$c2008
520 $aChina Ball clay has been used for centuries in the tiling and pottery-ware industry. Because it is much finer than the other components in the casting slip the ball clay dominates the particle-particle interactions. Therefore, the ball-clays give the cast its plasticity and cohesion. The clay under investigation is a dark slightly sandy china ball (DSSCB) clay with a high content of finely divided kaolinite and is mixed with other substances for casting. Because of its surface area properties and its associated organic matter it has an important influence on the cohesiveness and visco-elastic properties of the clay bodies used in manufacturing pottery ware. The fine particles in the ball clays have an important influence on the rheology of the wholebody, and stabilise the flow and casting properties of the slip. A number of analytical procedures have been used in this study in order to gain a better understanding of the clays and their associated organic materials. Identification of the amount and nature of the active organic fraction and of its mode of action is important. The work described here is part of a larger project that investigates the chemical properties and compositions of the clay and lignite materials, and the nature of clay-humic complexes and of lignite materials in clay and lignite deposits.
653 $aChina Ball Clay
653 $ahumic
653 $aNMR
653 $aorganic fraction
700 1 $aSTUART, J.
700 1 $aNOVOTNY, E. H.
700 1 $aHAYES, M. H. B.
700 1 $aYOUNG, K.
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