Environmental heterogeneity caused by anthropogenic disturbance drives forest structure and dynamics in Brazilian atlantic forest

Cirne-Silva T. M., . and Carvalho W. A. C., . and Terra M. C. N. S., . and de Souza C. R., . and Santos A. B. M., . and Robinson S. J. B., . and dos Santos R. M., . Environmental heterogeneity caused by anthropogenic disturbance drives forest structure and dynamics in Brazilian atlantic forest. pp. 125-135. ISSN 0128-1283

We evaluated how tree community floristic composition forest structure and dynamics varied over a period of 13 years across a topographic gradient of ravines created by anthropic disturbance in Brazilian Atlantic Forest. The study area is located within a fragment of Atlantic Forest (21 09' S 44 54' W) in Minas Gerais state Brazil. This work was based on data of tree diameter at 1.3 m from the soil collected in four inventories. Each individual was recorded as being in one of three stratified topographic classes: hilltop slope and bottom. We used direct gradient analysis to evaluate floristic compositional changes phytosociological analysis to evaluate structural variations and assessed demographic and biomass changes over time through analysis of rates of forest dynamics. The results did not reflect modifications in the patterns of floristic composition and species diversity along the topographic gradient while differences in forest structural attributes and dynamics may be detected at these smaller spatial scales. Thus the same species group may employ different strategies against different restrictive environmental factors. Finally we suggest that floristic composition and species diversity may be less sensitive parameters for post-disturbance responses than forest dynamics and structure.

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Abstract

We evaluated how tree community floristic composition forest structure and dynamics varied over a period of 13 years across a topographic gradient of ravines created by anthropic disturbance in Brazilian Atlantic Forest. The study area is located within a fragment of Atlantic Forest (21 09' S 44 54' W) in Minas Gerais state Brazil. This work was based on data of tree diameter at 1.3 m from the soil collected in four inventories. Each individual was recorded as being in one of three stratified topographic classes: hilltop slope and bottom. We used direct gradient analysis to evaluate floristic compositional changes phytosociological analysis to evaluate structural variations and assessed demographic and biomass changes over time through analysis of rates of forest dynamics. The results did not reflect modifications in the patterns of floristic composition and species diversity along the topographic gradient while differences in forest structural attributes and dynamics may be detected at these smaller spatial scales. Thus the same species group may employ different strategies against different restrictive environmental factors. Finally we suggest that floristic composition and species diversity may be less sensitive parameters for post-disturbance responses than forest dynamics and structure.

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Item Type:	Article
AGROVOC Term:	Forests
AGROVOC Term:	Forest trees
AGROVOC Term:	Plant communities
AGROVOC Term:	Forest trees
AGROVOC Term:	Tropical Atlantic
AGROVOC Term:	Forest inventories
AGROVOC Term:	Environmental factors
AGROVOC Term:	Topography
AGROVOC Term:	Demography
AGROVOC Term:	Floristic composition
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9054

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