Variations in precipitation and the equilibrium dynamics of a tropical forest tree community in South-Eastern Brazil

Morel J. D., . and Carvalho W. A. C., . and dos Santos R. M., . and Silva T. M. C., . and Santos A. B. M., . and Figueiredo M. A. P., . and de Souza C. R., . and da Silva K. G., . Variations in precipitation and the equilibrium dynamics of a tropical forest tree community in South-Eastern Brazil. pp. 597-605. ISSN 0128-1283

Tropical forests are dynamic communities where stochastic and unpredictable events such as climate change affect key ecological processes. The objective of this study was to describe the dynamic behaviour of a semideciduous seasonal forest during 15 years of monitoring with four sampling intervals in order to verify if fluctuations in forest dynamics are related to precipitation variations. The work was carried out based on diameter at breast height measured in 25 plots of 400 m each in four forest inventories (2000 2005 2009 2015). To evaluate the direction of forest dynamic changes over time we performed analyses of mortality rates recruitment and net changes in number of individuals and rates of loss and gain in basal area. The results suggested that the forest was undergoing a rhythmic cycle characterised by the imbalance in forest dynamics with rates of mortality and gain in basal area greater than those of recruitment and loss in basal area respectively. However this natural cycle may be influenced by variation in precipitation since in the periods characterised as dry mortality rates increased and there was less increment in basal area.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v30n4/5...

Abstract

Tropical forests are dynamic communities where stochastic and unpredictable events such as climate change affect key ecological processes. The objective of this study was to describe the dynamic behaviour of a semideciduous seasonal forest during 15 years of monitoring with four sampling intervals in order to verify if fluctuations in forest dynamics are related to precipitation variations. The work was carried out based on diameter at breast height measured in 25 plots of 400 m each in four forest inventories (2000 2005 2009 2015). To evaluate the direction of forest dynamic changes over time we performed analyses of mortality rates recruitment and net changes in number of individuals and rates of loss and gain in basal area. The results suggested that the forest was undergoing a rhythmic cycle characterised by the imbalance in forest dynamics with rates of mortality and gain in basal area greater than those of recruitment and loss in basal area respectively. However this natural cycle may be influenced by variation in precipitation since in the periods characterised as dry mortality rates increased and there was less increment in basal area.

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Item Type:	Article
AGROVOC Term:	Tropical forests
AGROVOC Term:	Forest trees
AGROVOC Term:	Tropical seasonal forests
AGROVOC Term:	Population dynamics
AGROVOC Term:	Environmental monitoring
AGROVOC Term:	Precipitation
AGROVOC Term:	Breast height diameter
AGROVOC Term:	Mortality
AGROVOC Term:	Climate change
AGROVOC Term:	Ecological agriculture
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24766

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