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Dynamic equilibrium and decelerating growth of a seasonal Neotropical gallery forest in the Brazilian savanna

Published online by Cambridge University Press:  11 April 2016

Iris Roitman ,
Jerome K. Vanclay ,
John D. Hay  and
Jeanine M. Felfili
Iris Roitman*
Affiliation:
Department of Ecology, Universidade de Brasília, Zip Code 70919-900, Brasília, Brazil
Jerome K. Vanclay
Affiliation:
School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia
John D. Hay
Affiliation:
Department of Ecology, Universidade de Brasília, Zip Code 70919-900, Brasília, Brazil
*
1Corresponding author. Email: [email protected]
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Abstract:

Describing and understanding growth patterns in tropical forests is crucial to assessing their role in carbon balance. Growth and vital rates of a protected gallery forest in central Brazil were estimated, based on six measurement intervals between 1985 and 2009. The sample consisted of all stems ≥ 10 cm diameter at breast height measured in 151 permanent plots (10 × 20 m), distributed in 10 transects perpendicular to the watercourse and 100 m apart from each other. Statistical significance of changes in density, basal area, growth and vital rates were tested using Wilcoxon signed-rank tests. Vital rates oscillated during the study period. Growth, recruitment and turnover rates fluctuated, but had a net decrease over the whole study period, whereas mortality seemed to be affected by a high disturbance event during the 1994–1999 period. The oscillatory behaviour of growth suggests that the forest is pulsating around a stable state (dynamic equilibrium). Nonetheless, persistence of decelerating growth trends may force the site's carrying capacity to a lower density or biomass state.

Keywords

dynamic equilibriumforest dynamicsforest growthgallery forestriparian forestsavannatropical forest
Type
Research Article
Information
Journal of Tropical Ecology , Volume 32 , Issue 3 , May 2016 , pp. 193 - 200
Copyright
Copyright © Cambridge University Press 2016 

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References

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