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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
14/02/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
HAMILTON, S. K.; SIPPEL, S. J.; MELACK, J. M. |
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Afiliação: |
Department of Biological Sciences, University of California, Santa Barbara. |
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Título: |
The origin of "excess CO2" in waters of the Pantanal wetland of Brazil. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
In: SYMPOSIUM ON THE BIOGEOCHEMISTRY OF WETLANDS, 3., 1994, Orlando. Abstracts... Orlando: [s.n.] 1994. não paginado. |
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Idioma: |
Inglês |
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Conteúdo: |
The waters of the Pantanal, a large savanna floodplain, are characteristically low in dissolved O2 and high in dissolved CO2 and CH4. Analysis of dissolved gases in samples from throughout the region reveals that the waters tend to contain considerably more CO2 than can be accounted for by the observed consumption of dissolved O2. This "excess CO2" has several possible origins, including 1) anaerobic respiration or methanogenesis carried out by bacteria, 2) anaerobic metabolism in submerged organs of aquatic vascular plants, and 3) a greater tendency for dissolution of CO2 than O2 from the aerenchyma of submerged vascular plants. These alternative hypotheses are evaluated, drawing on additional measurements of the gas composition of sediment bubbles and plant stems. We conclude that the metabolism of emergent vascular plants is likely to be a major source of the "excess CO2". |
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Palavras-Chave: |
Analysis; Excess CO2; Wetland. |
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Thesagro: |
Água; Análise; Limnologia. |
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Thesaurus Nal: |
limnology; Pantanal; water. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01586naa a2200253 a 4500
001 1783815
005 2017-04-06
008 1994 bl --- 0-- u #d
100 1 $aHAMILTON, S. K.
245 $aThe origin of "excess CO2" in waters of the Pantanal wetland of Brazil.
260 $c1994
520 $aThe waters of the Pantanal, a large savanna floodplain, are characteristically low in dissolved O2 and high in dissolved CO2 and CH4. Analysis of dissolved gases in samples from throughout the region reveals that the waters tend to contain considerably more CO2 than can be accounted for by the observed consumption of dissolved O2. This "excess CO2" has several possible origins, including 1) anaerobic respiration or methanogenesis carried out by bacteria, 2) anaerobic metabolism in submerged organs of aquatic vascular plants, and 3) a greater tendency for dissolution of CO2 than O2 from the aerenchyma of submerged vascular plants. These alternative hypotheses are evaluated, drawing on additional measurements of the gas composition of sediment bubbles and plant stems. We conclude that the metabolism of emergent vascular plants is likely to be a major source of the "excess CO2".
650 $alimnology
650 $aPantanal
650 $awater
650 $aÁgua
650 $aAnálise
650 $aLimnologia
653 $aAnalysis
653 $aExcess CO2
653 $aWetland
700 1 $aSIPPEL, S. J.
700 1 $aMELACK, J. M.
773 $tIn: SYMPOSIUM ON THE BIOGEOCHEMISTRY OF WETLANDS, 3., 1994, Orlando. Abstracts... Orlando: [s.n.] 1994. não paginado.
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Registro original: |
Embrapa Pantanal (CPAP) |
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