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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Gado de Corte; Embrapa Pantanal. |
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Data corrente: |
10/01/2000 |
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Data da última atualização: |
07/11/2001 |
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Autoria: |
BOOCK, A. |
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Título: |
An appraisal of the environmental factors associated with the cerrado ecosystem of Brazil.. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Colorado: Colorado State University, 1978. |
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Páginas: |
65p. |
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Idioma: |
Inglês |
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Notas: |
Tese Mestrado. |
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Conteúdo: |
Cerrado is a savanna-like vegetation which occurs over a large area of central Brazil. It is characteristically composed of a seasonal herbaceous ground layer primarily of grasses and sedges, and semideciduous, variably dense shrubby and arboreal strata. Both herbaceous and woody species have a high degree of xeromorphism. Several environmental factors which appear to be associated with the presence of the cerrado vegetation are distinguishing. Rainfall availability is strongly seasonal with amounts intermediate to those of the surrounding vegetational provinces. Temperature is almost always adequate for plant growth and occasional frost may occur only towards the cerrado's southern limits. Soils under cerrado are predominantly deep and well-drained, have lowwater-retention capacity, and are extremely infertile. Fire is closelyassociated with cerrado. Naturally-caused fires have probably occurred somewhat frequently since the origin of the ecosystem, and man-set fires commoly occur once every few years. Four major hypotheses have been prposed in order to explain the origin, evolution and maintenance of the cerrado vegetation. They are: (1) cerrado is a derived vegetation which resulted from slash and burn or just from frequent burning of the once original mesophytic forest; (2) cerrado is a xeromorphic vegetation which evolved primarily to withstand seasonal soil water deficit; (3) cerrado is a vegetation which has evolved primarily and is highly adapted to thrive in soils poor in available nutrients which... MenosCerrado is a savanna-like vegetation which occurs over a large area of central Brazil. It is characteristically composed of a seasonal herbaceous ground layer primarily of grasses and sedges, and semideciduous, variably dense shrubby and arboreal strata. Both herbaceous and woody species have a high degree of xeromorphism. Several environmental factors which appear to be associated with the presence of the cerrado vegetation are distinguishing. Rainfall availability is strongly seasonal with amounts intermediate to those of the surrounding vegetational provinces. Temperature is almost always adequate for plant growth and occasional frost may occur only towards the cerrado's southern limits. Soils under cerrado are predominantly deep and well-drained, have lowwater-retention capacity, and are extremely infertile. Fire is closelyassociated with cerrado. Naturally-caused fires have probably occurred somewhat frequently since the origin of the ecosystem, and man-set fires commoly occur once every few years. Four major hypotheses have been prposed in order to explain the origin, evolution and maintenance of the cerrado vegetation. They are: (1) cerrado is a derived vegetation which resulted from slash and burn or just from frequent burning of the once original mesophytic forest; (2) cerrado is a xeromorphic vegetation which evolved primarily to withstand seasonal soil water deficit; (3) cerrado is a vegetation which has evolved primarily and is highly adapted to thrive in soils p... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Climat; Ecosystem; Fire; Savanna. |
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Thesagro: |
Água; Cerrado; Clima; Ecologia; Ecossistema; Fogo; Solo; Vegetação. |
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Thesaurus Nal: |
Brazil; ecology; soil; vegetation; water. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02342nam a2200349 a 4500
001 1555535
005 2001-11-07
008 1978 bl uuuu m 00u1 u #d
100 1 $aBOOCK, A.
245 $aAn appraisal of the environmental factors associated with the cerrado ecosystem of Brazil..
260 $aColorado: Colorado State University$c1978
300 $a65p.
500 $aTese Mestrado.
520 $aCerrado is a savanna-like vegetation which occurs over a large area of central Brazil. It is characteristically composed of a seasonal herbaceous ground layer primarily of grasses and sedges, and semideciduous, variably dense shrubby and arboreal strata. Both herbaceous and woody species have a high degree of xeromorphism. Several environmental factors which appear to be associated with the presence of the cerrado vegetation are distinguishing. Rainfall availability is strongly seasonal with amounts intermediate to those of the surrounding vegetational provinces. Temperature is almost always adequate for plant growth and occasional frost may occur only towards the cerrado's southern limits. Soils under cerrado are predominantly deep and well-drained, have lowwater-retention capacity, and are extremely infertile. Fire is closelyassociated with cerrado. Naturally-caused fires have probably occurred somewhat frequently since the origin of the ecosystem, and man-set fires commoly occur once every few years. Four major hypotheses have been prposed in order to explain the origin, evolution and maintenance of the cerrado vegetation. They are: (1) cerrado is a derived vegetation which resulted from slash and burn or just from frequent burning of the once original mesophytic forest; (2) cerrado is a xeromorphic vegetation which evolved primarily to withstand seasonal soil water deficit; (3) cerrado is a vegetation which has evolved primarily and is highly adapted to thrive in soils poor in available nutrients which...
650 $aBrazil
650 $aecology
650 $asoil
650 $avegetation
650 $awater
650 $aÁgua
650 $aCerrado
650 $aClima
650 $aEcologia
650 $aEcossistema
650 $aFogo
650 $aSolo
650 $aVegetação
653 $aBrasil
653 $aClimat
653 $aEcosystem
653 $aFire
653 $aSavanna
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 27 | |
| 19. |  | POTT, A.; POTT, V. J.; ARAUJO, M. R.; BOOCK, A.; PEREIRA, M. Flora da fazenda Acurizal, Nabileque, Pantanal: I.relação preliminar. In: CONGRESSO NACIONAL DE BOTANICA, 39., 1988, Belem. Resumos... Belem: Sociedade Botanica do Brasil / Museu Paraense Emilio Goeldi, 1988. v.1, p.272.| Biblioteca(s): Embrapa Pantanal. |
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| Registros recuperados : 27 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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