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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
30/03/1999 |
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Data da última atualização: |
03/02/2017 |
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Autoria: |
CASTRO, E. A. de; KAUFFMAN, J. B. |
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Título: |
Ecosystem structure in the Brazilian cerrado: a vegetation gradient of aboveground biomass, root mass and consumption by fire. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Journal of Tropical Ecology, New York, v.14, p.263-283, 1998. |
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Idioma: |
Inglês |
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Conteúdo: |
Conversion to permanent agriculture is rapidly occurring over vast areas of the 1.8 million km2 Brazilian Cerrado; a region that is naturally a mosaic of grasslands, savannas and evergreen tropical woodlands. Yet, few studies have quantified total biomass of plant communities in this ecosystem, particulary the belowground component; a C pool of potencial global significance. Total biomass (aboveground and belowground), and the quantity of biomass consumed by fires were measured in four communities comprising a vegetation gradient from pure grassland (campo limpo) to a woodland with a closed canopy of tall shrubs and scattered trees (cerrado denso) near Brasilia, DF, Brasil. Total aboveground biomass (TAGB) increased along this gradient from 5.5 Mg ha-1 in campo limpo to 29.4 Mg ha-1 in cerrado denso. Vegetation structure varied among communities; trees were nonexistent in campo limpo, but were at a density of 1000 ha-1 and a biomass of 12.9 Mg ha-1 in cerrado denso. Fires consumed 92 and 84% of the TAGB in campo limpo (pure grassland) and campo sujo (savanna), respectively. In cerrado aberto and cerrado denso, trees and tall shrubs were little affected by fire. Combustion factors of the TAGB in these communities was 54 and 33%, respectively. The total biomass consumed by fire ranged from 5.0 Mg ha-1 in campo limpo to 13.5 Mg ha-1 in cerrado aberto. Compared to other widespread Brazilian ecosystems (tropical dry forest and evergreen forest), the Cerrado has a lower aboveground biomass. The TAGB of cerrado denso is <9% of that of Amazonian tropical evergreen forest. The total quantity of biomass consumed by fire, and hence emissions to the atmosphere is lower in intact Cerrado communities compared to fires in slashed tropical forest. Total belowground biomass (TBGB) increased from 16.3 Mg ha-1 in campo limpo, to 30.1 Mg ha-1 in campo sujo, to 46.5-1 Mg ha in cerrado aberto, and to 52.9 Mg ha-1 in cerrado denso. This quantity of belowground biomass is similar to, or exceeds that reported for many tropical dry moist forests. More than 80% of the TBGB occurred in the upper 30 cm of the soil, except for cerrado denso (71%) where a greater proportion of tree roots were present at deeper levels. Root shoot ratios were very high in all sites ranging from 2.9 in cerrado denso to 77. in campo sujo. Total ecosystem plant biomass (the total aboveground biomass and TBGB combined) ranged from 21.9 Mg ha-1 in campo limpo to 77.9 Mg ha-1 in cerrado denso. More than 71% of the live phytomass (aboveground biomass+root biomass) is belowground in the Brazilian Cerrado. At current rates of land cover change in the Brazilian Cerrado, these ecosystem pools are likely significant sources of increasing atmospheric C and other greenhouse grasses. MenosConversion to permanent agriculture is rapidly occurring over vast areas of the 1.8 million km2 Brazilian Cerrado; a region that is naturally a mosaic of grasslands, savannas and evergreen tropical woodlands. Yet, few studies have quantified total biomass of plant communities in this ecosystem, particulary the belowground component; a C pool of potencial global significance. Total biomass (aboveground and belowground), and the quantity of biomass consumed by fires were measured in four communities comprising a vegetation gradient from pure grassland (campo limpo) to a woodland with a closed canopy of tall shrubs and scattered trees (cerrado denso) near Brasilia, DF, Brasil. Total aboveground biomass (TAGB) increased along this gradient from 5.5 Mg ha-1 in campo limpo to 29.4 Mg ha-1 in cerrado denso. Vegetation structure varied among communities; trees were nonexistent in campo limpo, but were at a density of 1000 ha-1 and a biomass of 12.9 Mg ha-1 in cerrado denso. Fires consumed 92 and 84% of the TAGB in campo limpo (pure grassland) and campo sujo (savanna), respectively. In cerrado aberto and cerrado denso, trees and tall shrubs were little affected by fire. Combustion factors of the TAGB in these communities was 54 and 33%, respectively. The total biomass consumed by fire ranged from 5.0 Mg ha-1 in campo limpo to 13.5 Mg ha-1 in cerrado aberto. Compared to other widespread Brazilian ecosystems (tropical dry forest and evergreen forest), the Cerrado has a lower abovegroun... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Brasilia; Distrito Federal; Ecologia do fogo. |
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Thesagro: |
Biomassa; Cerrado; Raiz. |
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Thesaurus Nal: |
biomass; Brazil; fire ecology; roots. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03499naa a2200265 a 4500
001 1554779
005 2017-02-03
008 1998 bl uuuu u00u1 u #d
100 1 $aCASTRO, E. A. de
245 $aEcosystem structure in the Brazilian cerrado$ba vegetation gradient of aboveground biomass, root mass and consumption by fire.
260 $c1998
520 $aConversion to permanent agriculture is rapidly occurring over vast areas of the 1.8 million km2 Brazilian Cerrado; a region that is naturally a mosaic of grasslands, savannas and evergreen tropical woodlands. Yet, few studies have quantified total biomass of plant communities in this ecosystem, particulary the belowground component; a C pool of potencial global significance. Total biomass (aboveground and belowground), and the quantity of biomass consumed by fires were measured in four communities comprising a vegetation gradient from pure grassland (campo limpo) to a woodland with a closed canopy of tall shrubs and scattered trees (cerrado denso) near Brasilia, DF, Brasil. Total aboveground biomass (TAGB) increased along this gradient from 5.5 Mg ha-1 in campo limpo to 29.4 Mg ha-1 in cerrado denso. Vegetation structure varied among communities; trees were nonexistent in campo limpo, but were at a density of 1000 ha-1 and a biomass of 12.9 Mg ha-1 in cerrado denso. Fires consumed 92 and 84% of the TAGB in campo limpo (pure grassland) and campo sujo (savanna), respectively. In cerrado aberto and cerrado denso, trees and tall shrubs were little affected by fire. Combustion factors of the TAGB in these communities was 54 and 33%, respectively. The total biomass consumed by fire ranged from 5.0 Mg ha-1 in campo limpo to 13.5 Mg ha-1 in cerrado aberto. Compared to other widespread Brazilian ecosystems (tropical dry forest and evergreen forest), the Cerrado has a lower aboveground biomass. The TAGB of cerrado denso is <9% of that of Amazonian tropical evergreen forest. The total quantity of biomass consumed by fire, and hence emissions to the atmosphere is lower in intact Cerrado communities compared to fires in slashed tropical forest. Total belowground biomass (TBGB) increased from 16.3 Mg ha-1 in campo limpo, to 30.1 Mg ha-1 in campo sujo, to 46.5-1 Mg ha in cerrado aberto, and to 52.9 Mg ha-1 in cerrado denso. This quantity of belowground biomass is similar to, or exceeds that reported for many tropical dry moist forests. More than 80% of the TBGB occurred in the upper 30 cm of the soil, except for cerrado denso (71%) where a greater proportion of tree roots were present at deeper levels. Root shoot ratios were very high in all sites ranging from 2.9 in cerrado denso to 77. in campo sujo. Total ecosystem plant biomass (the total aboveground biomass and TBGB combined) ranged from 21.9 Mg ha-1 in campo limpo to 77.9 Mg ha-1 in cerrado denso. More than 71% of the live phytomass (aboveground biomass+root biomass) is belowground in the Brazilian Cerrado. At current rates of land cover change in the Brazilian Cerrado, these ecosystem pools are likely significant sources of increasing atmospheric C and other greenhouse grasses.
650 $abiomass
650 $aBrazil
650 $afire ecology
650 $aroots
650 $aBiomassa
650 $aCerrado
650 $aRaiz
653 $aBrasil
653 $aBrasilia
653 $aDistrito Federal
653 $aEcologia do fogo
700 1 $aKAUFFMAN, J. B.
773 $tJournal of Tropical Ecology, New York$gv.14, p.263-283, 1998.
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Embrapa Cerrados (CPAC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
|
Data corrente: |
03/06/1992 |
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Data da última atualização: |
18/03/2015 |
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Autoria: |
FREITAS, A. R. de. |
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Afiliação: |
ALFREDO RIBEIRO DE FREITAS, EMBRAPA-UEPAE, São Carlos, SP. |
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Título: |
Processamento de dados: CP/M e MS-DOS |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
São Carlos: EMBRAPA-UEPAE de São Carlos, 1988. |
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Páginas: |
213p. |
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Série: |
(EMBRAPA-UEPAE de São Carlos. Documentos, 8) |
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ISSN: |
0102-2539 |
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Idioma: |
Português |
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Conteúdo: |
Atividades CPD; Tipos Processamento: manual, semiautomatico e automatico; Computação; Elementos de um computador: unidade de entrada; Central de processamento; Memória auxiliar; Desenvolvimento do processamento; Primeira e Segunda Geração de Computadores; Introdução do Computador no Brasil; Terceira, Quarta e Quinta Geração Computadores; Classificação computador por tipo: digital; analógico e híbrido; Áreas de atuação do computador; Científica; Comercial; Controle Automático Processos; Simulação; Modelagem Matemática; Diversão; Sinclair; APPLE; TRS-80; PC; MSX; Equipamento de um CPD; MICRO; Supermico; Mini: Supermini; Armazenamento de informações; Bit; Byte; Memória de nucleo magnetico; Palavra de memoria; Registro de dados; Arquivo de dados; Sistemas de numeração: binario, octal, hexadecimal, BCD, EBCDIC, ASCII; Conversão entre sistemas; Descrição fisíca do computador: Harwdare; Unidade de netrada; Memórias auxiliares; Unidades de saída; Sistemas operacionais; GP/M; Organização de um CPD; Software: Principais linguagens; Teleprocessamento; Videotexto; Transmissão via telex; Gerenciadores de banco de dados; DBASE III; Processadores de texto: wordstar; Resumo dos comandos mais utilizados; Planilhas eletrônicas e programas integrados; LOTUS 1-2-3. |
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Palavras-Chave: |
Analógico; Apple; Assembly; Basic; Brasil; C; Cartão perfurado; Cassete; Cobol; Computação; Computacao manual; Computador manual; Computadores; Computation; Computer applications; Computing; CP/M; CPD; CPD manual; CPI; D; Dados; Data; Desenvolvimento; Disco magnético; Disquete; Drives; Elementos; Empresa Brasileira Pesquisa Agropecuaria Unidade Execucao Pesquisa Ambito Estadual Sao Carlos; Fita; Fluxogramas; Forth; Fortran; Guide; Hardware; Linguagem; Linguagens; LISP; LOGO; Magnética; Manual; Micro; MS-DOS; MSX; P; Painel; PASCAL; PC; Planilha eletronica; Processamento Dados; Processamento de dado; Processamento de dados; Processamento de dados-manual; Processing; Programa integrado; Programacao; Programming; Saída; Sao Paulo; Símbolos; Sinclair; Sistema operacional; Sistemas operacionais; Software; Super micro; Super mini; Tambor; Tipo-digital; TRS-80; Unidade; Vídeo; Winchester; Wordstar. |
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Thesagro: |
Computador; Família; Hibrido; Informática; Microcomputador; Papel; Processamento. |
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Thesaurus NAL: |
Brazil. |
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Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03925nam a2201117 a 4500
001 1032187
005 2015-03-18
008 1988 bl uuuu 00u1 u #d
022 $a0102-2539
100 1 $aFREITAS, A. R. de
245 $aProcessamento de dados$bCP/M e MS-DOS
260 $aSão Carlos: EMBRAPA-UEPAE de São Carlos$c1988
300 $a213p.
490 $a(EMBRAPA-UEPAE de São Carlos. Documentos, 8)
520 $aAtividades CPD; Tipos Processamento: manual, semiautomatico e automatico; Computação; Elementos de um computador: unidade de entrada; Central de processamento; Memória auxiliar; Desenvolvimento do processamento; Primeira e Segunda Geração de Computadores; Introdução do Computador no Brasil; Terceira, Quarta e Quinta Geração Computadores; Classificação computador por tipo: digital; analógico e híbrido; Áreas de atuação do computador; Científica; Comercial; Controle Automático Processos; Simulação; Modelagem Matemática; Diversão; Sinclair; APPLE; TRS-80; PC; MSX; Equipamento de um CPD; MICRO; Supermico; Mini: Supermini; Armazenamento de informações; Bit; Byte; Memória de nucleo magnetico; Palavra de memoria; Registro de dados; Arquivo de dados; Sistemas de numeração: binario, octal, hexadecimal, BCD, EBCDIC, ASCII; Conversão entre sistemas; Descrição fisíca do computador: Harwdare; Unidade de netrada; Memórias auxiliares; Unidades de saída; Sistemas operacionais; GP/M; Organização de um CPD; Software: Principais linguagens; Teleprocessamento; Videotexto; Transmissão via telex; Gerenciadores de banco de dados; DBASE III; Processadores de texto: wordstar; Resumo dos comandos mais utilizados; Planilhas eletrônicas e programas integrados; LOTUS 1-2-3.
650 $aBrazil
650 $aComputador
650 $aFamília
650 $aHibrido
650 $aInformática
650 $aMicrocomputador
650 $aPapel
650 $aProcessamento
653 $aAnalógico
653 $aApple
653 $aAssembly
653 $aBasic
653 $aBrasil
653 $aC
653 $aCartão perfurado
653 $aCassete
653 $aCobol
653 $aComputação
653 $aComputacao manual
653 $aComputador manual
653 $aComputadores
653 $aComputation
653 $aComputer applications
653 $aComputing
653 $aCP/M
653 $aCPD
653 $aCPD manual
653 $aCPI
653 $aD
653 $aDados
653 $aData
653 $aDesenvolvimento
653 $aDisco magnético
653 $aDisquete
653 $aDrives
653 $aElementos
653 $aEmpresa Brasileira Pesquisa Agropecuaria Unidade Execucao Pesquisa Ambito Estadual Sao Carlos
653 $aFita
653 $aFluxogramas
653 $aForth
653 $aFortran
653 $aGuide
653 $aHardware
653 $aLinguagem
653 $aLinguagens
653 $aLISP
653 $aLOGO
653 $aMagnética
653 $aManual
653 $aMicro
653 $aMS-DOS
653 $aMSX
653 $aP
653 $aPainel
653 $aPASCAL
653 $aPC
653 $aPlanilha eletronica
653 $aProcessamento Dados
653 $aProcessamento de dado
653 $aProcessamento de dados
653 $aProcessamento de dados-manual
653 $aProcessing
653 $aPrograma integrado
653 $aProgramacao
653 $aProgramming
653 $aSaída
653 $aSao Paulo
653 $aSímbolos
653 $aSinclair
653 $aSistema operacional
653 $aSistemas operacionais
653 $aSoftware
653 $aSuper micro
653 $aSuper mini
653 $aTambor
653 $aTipo-digital
653 $aTRS-80
653 $aUnidade
653 $aVídeo
653 $aWinchester
653 $aWordstar
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