Data/hora: 14/06/2024 02:04:43

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 14/02/1995
Data da última atualização: | 06/04/2017
Autoria: | SIPPEL, S. J.; HAMILTON, S. K.; MELACK, J. M.
Afiliação: | Department of Biological Sciences, University of California, Santa Barbara.
Título: | Methane in sediment gas bubbles in the Pantanal wetland, Brazil.
Ano de publicação: | 1993
Fonte/Imprenta: | In: SYMPOSIUM ON THE BIOGEOCHEMISTRY OF WETLANDS, 3., 1994, Orlando. Abstracts... Orlando: [s.n.] 1994. não paginado.
Idioma: | Inglês
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.
Palavras-Chave: | Analysis; Gas bubbles; Gás metano; Wetland.
Thesagro: | Água; Análise; Limnologia; Sedimento.
Thesaurus Nal: | limnology; methane; Pantanal; sediments; water.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (27694-1) - ADD - SP - PP - SP14079 -  - 14079 - DIS