Growth, recruitment and mortality in the Gama gallery forest in central Brazil over a six year period (1985-1991)
Diameter increments, recruitment and mortality were studied over a six-year period in a 3.02 ha sample in an area of 64 ha of undisturbed gallery forest alongside the Gama stream. The study site is located in Fazenda Agua Limpa in Brasília, Federal District, Brazil. Trees ó31 cm gbh (10 cm dbh) were measured every three years from 1985 in 151 (10 m X 20 m) permanent plots in Gama forest. The mean annual diameter increment for trees ó10 cm dbh was 0.25 cm Y exponent -1. Variability was high with coefficients of variation c. 100 percent or more. Light-demanding and large upper storey species tended to grow faster than shade-tolerant and lower storey species. Mean increments for the community increased with increasing diameter classes. The mean annual mortality rate for the community was 3.5 per cent Y exponent -1 while the recruitment was 2.7 per cent. The community was dynamic with 86 percent of all species either suffering mortality or gaining recruits or both during the six years. The net difference between recruitment and mortality was zero for 55 species. The recruitment compensated for the mortality of most of the abundant species.
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| Format: | biblioteca |
| Published: |
1995
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| Subjects: | MORTALIDAD, CRECIMIENTO, DIAMETRO, BOSQUE DE GALERIA, BRASIL, |
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