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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: |
SIPPEL, S. J.; HAMILTON, S. K.; MELACK, J. M. |
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Afiliação: |
Department of Biological Sciences, University of California, Santa Barbara. |
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Título: |
Methane in sediment gas bubbles in the Pantanal wetland, Brazil. |
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Ano de publicação: |
1993 |
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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 Pantanal is a vast tropical wetland composed largely of seasonally flooded grasslands. Aquatic vascular plants predominate during flooding in most areas, often attaining high biomass. We analyzed 68 samples of gas bubbles from the sediments and leaf litter in a variety of representative aquatic environments, including riverine floodplains covered with dense mats of floating plants as well as marshes with rooted emergent vegetation. The sediment gases tend to have high concentrations of methane (mean +- s. d., 53 +- 21%), with a wide range (5-84%). These high concentration suggest high rates of methane production and ebullition. The remaining gases in the bubbles include carbon dioxide (3,8+- 2,9%), oxygen (1,9+- 3.4%), and nitrogen (41 +- 20%). We discuss the relationship between sediment gas content and gases dissolved in the overlying water column, as well as spatial and temporal patterns in sediment gas composition. |
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Palavras-Chave: |
Analysis; Gas bubbles; Gás metano; Wetland. |
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Thesagro: |
Água; Análise; Limnologia; Sedimento. |
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Thesaurus Nal: |
limnology; methane; Pantanal; sediments; water. |
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Categoria do assunto: |
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Marc: |
LEADER 01732naa a2200301 a 4500
001 1783814
005 2017-04-06
008 1993 bl --- 0-- u #d
100 1 $aSIPPEL, S. J.
245 $aMethane in sediment gas bubbles in the Pantanal wetland, Brazil.
260 $c1993
520 $aThe Pantanal is a vast tropical wetland composed largely of seasonally flooded grasslands. Aquatic vascular plants predominate during flooding in most areas, often attaining high biomass. We analyzed 68 samples of gas bubbles from the sediments and leaf litter in a variety of representative aquatic environments, including riverine floodplains covered with dense mats of floating plants as well as marshes with rooted emergent vegetation. The sediment gases tend to have high concentrations of methane (mean +- s. d., 53 +- 21%), with a wide range (5-84%). These high concentration suggest high rates of methane production and ebullition. The remaining gases in the bubbles include carbon dioxide (3,8+- 2,9%), oxygen (1,9+- 3.4%), and nitrogen (41 +- 20%). We discuss the relationship between sediment gas content and gases dissolved in the overlying water column, as well as spatial and temporal patterns in sediment gas composition.
650 $alimnology
650 $amethane
650 $aPantanal
650 $asediments
650 $awater
650 $aÁgua
650 $aAnálise
650 $aLimnologia
650 $aSedimento
653 $aAnalysis
653 $aGas bubbles
653 $aGás metano
653 $aWetland
700 1 $aHAMILTON, S. K.
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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Embrapa Pantanal (CPAP) |
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