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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
21/07/2005 |
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Data da última atualização: |
13/03/2017 |
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Autoria: |
RICHEY, J. E.; HEDGES, J. I.; DEVOL, A. H.; QUAY, P. D.; VICTORIA, R.; MARTINELLI, L.; FORSBERG, B. R. |
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Afiliação: |
School of Oceanography and Quaternary Research Center, University of Washington; Esalq-Piracicaba; Centro de Energia Nuclear na Agricultura (Piracicaba); Instituto Nacional de Pesquisa da Amazônia. |
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Título: |
Biogeochemistry of carbon in the Amazon river. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Limnology and Oceanography, v. 35, n. 2, p. 352-371, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
Depth-integrated, discharge-weighted water samples were collected over 1,800 km of the Amazon River on eight cruises at different stages of the hudrograph, 1982-1984. Fine (FPOC, <63 um) particulate organic carbon as weight percentage of suspended sediment varied between 0.9-1.5% for FPOC and 0.5-3.4% for CPOC. Concentrations of FPOC ranged from 5 mg liter-1 upriver to 2 mg liter-1 dow river in the mainstem and from 6 mg liter-1 in the Rio Madeira to <1 in the Rio negro. CPOC had similar distribution patterns, but with concentrations 15-30% those of FPOC. Dissolved organic carbon (DOC) averaged 4-6 mg liter-1 in the mainstem and up to 12 mg liter -1 in the Rio Negro. Upriver dissolved inorganic carbon (DIC) concentrations of about 1,200 uM were diluted by tributaries and floodplain drainage to 600 uM at the most downriver site. Evasion of CO2, invasion of Os, and in situ oxidation were comparable magnitude, 3-8 umo m-2 s-1. The average export of total organic carbon (TOC) was 36.1 Tg yr-1 (8.5 g m-2 yr-1), of which 62% was DOC, 34% was FPOC, and 4% was CPOC. TOC inputs were insufficient to support in sito oxidation by a factor of at least two. A relatively small, rapidly cycling pool of labile organic matter may coexist with a much larger pooll of more reflactory material. |
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Palavras-Chave: |
Brasil; Rio Amazonas. |
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Thesagro: |
Carbono. |
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Thesaurus Nal: |
Amazon River; Brazil; carbon. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01955naa a2200265 a 4500
001 1786846
005 2017-03-13
008 1990 bl --- 0-- u #d
100 1 $aRICHEY, J. E.
245 $aBiogeochemistry of carbon in the Amazon river.
260 $c1990
520 $aDepth-integrated, discharge-weighted water samples were collected over 1,800 km of the Amazon River on eight cruises at different stages of the hudrograph, 1982-1984. Fine (FPOC, <63 um) particulate organic carbon as weight percentage of suspended sediment varied between 0.9-1.5% for FPOC and 0.5-3.4% for CPOC. Concentrations of FPOC ranged from 5 mg liter-1 upriver to 2 mg liter-1 dow river in the mainstem and from 6 mg liter-1 in the Rio Madeira to <1 in the Rio negro. CPOC had similar distribution patterns, but with concentrations 15-30% those of FPOC. Dissolved organic carbon (DOC) averaged 4-6 mg liter-1 in the mainstem and up to 12 mg liter -1 in the Rio Negro. Upriver dissolved inorganic carbon (DIC) concentrations of about 1,200 uM were diluted by tributaries and floodplain drainage to 600 uM at the most downriver site. Evasion of CO2, invasion of Os, and in situ oxidation were comparable magnitude, 3-8 umo m-2 s-1. The average export of total organic carbon (TOC) was 36.1 Tg yr-1 (8.5 g m-2 yr-1), of which 62% was DOC, 34% was FPOC, and 4% was CPOC. TOC inputs were insufficient to support in sito oxidation by a factor of at least two. A relatively small, rapidly cycling pool of labile organic matter may coexist with a much larger pooll of more reflactory material.
650 $aAmazon River
650 $aBrazil
650 $acarbon
650 $aCarbono
653 $aBrasil
653 $aRio Amazonas
700 1 $aHEDGES, J. I.
700 1 $aDEVOL, A. H.
700 1 $aQUAY, P. D.
700 1 $aVICTORIA, R.
700 1 $aMARTINELLI, L.
700 1 $aFORSBERG, B. R.
773 $tLimnology and Oceanography$gv. 35, n. 2, p. 352-371, 1990.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 5 | |
| 4. |  | OLIVEIRA, L. A.; SAID, M. M.; VIEIRA, G.; PRUDENTE, A. L. C.; RODRIGUES, M. R. L.; FORSBERG, B. R.; TADEI, W. P.; TEIXEIRA, W. G. Rede CTPetro Amazônia: estruturação e funcionamento de uma rede de pesquisas para a recuperação de áreas degradadas pela exploração de petróleo e gás natural na Amazônia. In: SIMPÓSIO NACIONAL [SOBRE] RECUPERAÇÃO DE ÁREAS DEGRADADAS, 7., 2008, Curitiba. Anais... Curitiba: FUPEF, 2008. p. 567-574.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| 5. | | GREENSTREET, L.; FAN, J.; PACHECO, F. S.; BAI, Y.; UMMUS, M. E.; DORIA, C.; BARROS, N. O.; FORSBERG, B. R.; XU, X.; FLECKER, A.; GOMES, C. Detecting aquaculture with deep learning in a low-data setting. In: SIGKDD FRAGILE EARTH WORKSHOP, 2023, Long Beach.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pesca e Aquicultura. |
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| Registros recuperados : 5 | |
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