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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
25/04/1995 |
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Data da última atualização: |
04/04/2017 |
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Autoria: |
YEATON, R. I.; FROST, S.; FROST, P. G. H. |
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Título: |
The structure of a grass community in Burkea africana savanna during recovery from fire. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
South African Journal of Botany, v.54, n.4, p.367-371, 1988. |
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Idioma: |
Inglês |
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Conteúdo: |
Three adjacent sites, differing in their fire histories, in the Eragrostis pallens-Digitaria eriantha association of the Burkea africana savanna at Nylsvley, northern Transvaal were compared. One site has been burned annually while the second and third sites had last been burned 5 and at least 12 years previously. Grass species richness was highnest on the annual decreased with an increasing period of protection from fire. Total mean basal areas of the grasses increased by 78% from the annual burn to the pretected site. The dominant grasses in this association, Eragrostis pallens Hackel and Digitaria eriantha Steudel, increased in abundance with protection from fire until thev comprised approximately 97% of the total number of individuals and total mean basal area found at the protected site. Annual burning reduced the density and average diameter of individuals of E. pallens, allowing opportunistic species to colonize this association. Significantly more individuals of E. pallens were found in the 5-year burn. Its numbers declined in the protected site, prsumably as a result of self-thinnning. The number of tillers produced, the number that flowered and flowering phenology of E. pallens was similar in populations on the annual burn and the protected site. On the burnt area after 5 years of protection, plants of this species produced significantly fewer tillers and the time of flowering was delayed compared with other treatments. Significantly more tillers of E. pallens were grazed uppon on the sites protected for 5 and 12 years. In contrast, D. eriantha plants no increase in size from the annual to the protected site but their density did increase. MenosThree adjacent sites, differing in their fire histories, in the Eragrostis pallens-Digitaria eriantha association of the Burkea africana savanna at Nylsvley, northern Transvaal were compared. One site has been burned annually while the second and third sites had last been burned 5 and at least 12 years previously. Grass species richness was highnest on the annual decreased with an increasing period of protection from fire. Total mean basal areas of the grasses increased by 78% from the annual burn to the pretected site. The dominant grasses in this association, Eragrostis pallens Hackel and Digitaria eriantha Steudel, increased in abundance with protection from fire until thev comprised approximately 97% of the total number of individuals and total mean basal area found at the protected site. Annual burning reduced the density and average diameter of individuals of E. pallens, allowing opportunistic species to colonize this association. Significantly more individuals of E. pallens were found in the 5-year burn. Its numbers declined in the protected site, prsumably as a result of self-thinnning. The number of tillers produced, the number that flowered and flowering phenology of E. pallens was similar in populations on the annual burn and the protected site. On the burnt area after 5 years of protection, plants of this species produced significantly fewer tillers and the time of flowering was delayed compared with other treatments. Significantly more tillers of E. pallens were... Mostrar Tudo |
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Palavras-Chave: |
Efeito; Effect; Fire; Pasture. |
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Thesagro: |
Fogo; Pastagem; Queimada. |
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Thesaurus Nal: |
burning. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02293naa a2200241 a 4500
001 1784113
005 2017-04-04
008 1988 bl --- 0-- u #d
100 1 $aYEATON, R. I.
245 $aThe structure of a grass community in Burkea africana savanna during recovery from fire.
260 $c1988
520 $aThree adjacent sites, differing in their fire histories, in the Eragrostis pallens-Digitaria eriantha association of the Burkea africana savanna at Nylsvley, northern Transvaal were compared. One site has been burned annually while the second and third sites had last been burned 5 and at least 12 years previously. Grass species richness was highnest on the annual decreased with an increasing period of protection from fire. Total mean basal areas of the grasses increased by 78% from the annual burn to the pretected site. The dominant grasses in this association, Eragrostis pallens Hackel and Digitaria eriantha Steudel, increased in abundance with protection from fire until thev comprised approximately 97% of the total number of individuals and total mean basal area found at the protected site. Annual burning reduced the density and average diameter of individuals of E. pallens, allowing opportunistic species to colonize this association. Significantly more individuals of E. pallens were found in the 5-year burn. Its numbers declined in the protected site, prsumably as a result of self-thinnning. The number of tillers produced, the number that flowered and flowering phenology of E. pallens was similar in populations on the annual burn and the protected site. On the burnt area after 5 years of protection, plants of this species produced significantly fewer tillers and the time of flowering was delayed compared with other treatments. Significantly more tillers of E. pallens were grazed uppon on the sites protected for 5 and 12 years. In contrast, D. eriantha plants no increase in size from the annual to the protected site but their density did increase.
650 $aburning
650 $aFogo
650 $aPastagem
650 $aQueimada
653 $aEfeito
653 $aEffect
653 $aFire
653 $aPasture
700 1 $aFROST, S.
700 1 $aFROST, P. G. H.
773 $tSouth African Journal of Botany$gv.54, n.4, p.367-371, 1988.
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Registro original: |
Embrapa Pantanal (CPAP) |
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