Population structure and budding three native cerrado in different fire regimes
DOI:
https://doi.org/10.5216/rbn.v11i2.29488Keywords:
Fire regimes, plant sprout, plant density, spatial distributionAbstract
The present study evaluated the influence of different fire regimes on the population structureand number of sprouts of two tree species: Roupala montana and Stryphnodendron adstringens and a shrubby: Rourea induta. The study was conducted at the Ecological Reserve of IBGE, Brasília, DF, Brazil,in areas of cerrado sensu stricto: protected from fire, burned with biennial and quadrennial burnt. Five plots of 20 x 50 m in each area (plants with ? 5 cm diameter) and a subplot of 10 x 10 m within each plot (diameter <5 cm) were demarcated. Population structure of plants and the density and diamete rof sprouts was evaluated. The spatial distribution was different between the shrub and tree species, butthe fire did not affect their distribution. The quadrennial and protected areas had higher plant densityand regrowth for the tree species, while the biennial area showed higher plant density and regrowth for the shrub species. In biennial area height and diameter of the three species were lower. Thus, in areassubjected to frequent burning tree species have decreased their populations, whereas the shrubby has colonized the environment through budding.
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