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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
25/07/2000 |
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Data da última atualização: |
03/02/2017 |
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Autoria: |
HOFFMANN, W. A. |
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Título: |
Post-establishment seedling success in the Brazilian Cerrado: a comparison of savanna and forest species. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Biotropica, Baton Rouge, v.32, n.1, p.62-69, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Due to frequent fire, low nutrient availability, and prolonged drought, tropical savanna is a stressful environment for the survival and growth of woody plant seedlings. To understand why forest species do not succeed in this environment while savanna species are able to persist, the effects of fire and woody cover on seedlings of these two functional groups were investigated in the Brazilian Cerrado. Seedlings were established in experimental plots under three densities of woody cover, in sites protected from file and sites to be subjected to fire. There was a clear difference in the ability of savanna and forest species to survive fire. None of the three forest species were able to survive fine during the first two vears of life. Whereas eight of the nine savanna species were able to resprout following fire. The small seed size of the ninth savanna species, Miconia albicans, predisposed its to be sensitive to fire, because there was a strong positive correlation between seed size and survivorship savanna species were less dependent on woody cover than were forest species, which exhibited higher growth and survival under tree in open grassland. The low rates of establishment and survival of forest trees in savanna, combined with high sensitivity to fire, appear sufficient to prevent the expansion of forest into savanna under current fire regimes in the Cerrado. |
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Thesagro: |
Cerrado; Floresta Tropical; Fogo; Planta Lenhosa; Plântula. |
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Thesaurus Nal: |
burning; seedlings; tropical forests; woody plants. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02013naa a2200229 a 4500
001 1555299
005 2017-02-03
008 2000 bl uuuu u00u1 u #d
100 1 $aHOFFMANN, W. A.
245 $aPost-establishment seedling success in the Brazilian Cerrado$ba comparison of savanna and forest species.
260 $c2000
520 $aDue to frequent fire, low nutrient availability, and prolonged drought, tropical savanna is a stressful environment for the survival and growth of woody plant seedlings. To understand why forest species do not succeed in this environment while savanna species are able to persist, the effects of fire and woody cover on seedlings of these two functional groups were investigated in the Brazilian Cerrado. Seedlings were established in experimental plots under three densities of woody cover, in sites protected from file and sites to be subjected to fire. There was a clear difference in the ability of savanna and forest species to survive fire. None of the three forest species were able to survive fine during the first two vears of life. Whereas eight of the nine savanna species were able to resprout following fire. The small seed size of the ninth savanna species, Miconia albicans, predisposed its to be sensitive to fire, because there was a strong positive correlation between seed size and survivorship savanna species were less dependent on woody cover than were forest species, which exhibited higher growth and survival under tree in open grassland. The low rates of establishment and survival of forest trees in savanna, combined with high sensitivity to fire, appear sufficient to prevent the expansion of forest into savanna under current fire regimes in the Cerrado.
650 $aburning
650 $aseedlings
650 $atropical forests
650 $awoody plants
650 $aCerrado
650 $aFloresta Tropical
650 $aFogo
650 $aPlanta Lenhosa
650 $aPlântula
773 $tBiotropica, Baton Rouge$gv.32, n.1, p.62-69, 2000.
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Registro original: |
Embrapa Cerrados (CPAC) |
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