Population dynamics of Attalea excelsa ( Arecaceae ) in floodplain forest of the Amazonian estuary

Guedes M. C., . and Lira-Guedes A. C., . and Piedade M. T. F., . and Batista A. P. B., . and Dantas A. R., . Population dynamics of Attalea excelsa ( Arecaceae ) in floodplain forest of the Amazonian estuary. pp. 105-113. ISSN 0128-1283

Attalea excelsa (urucurizeiro) is a dominant palm of the estuarine floodplains with great potential for nontimber management. This study evaluated the population dynamics of urucurizeiro and the factors that contribute to colonising of this species in a flooded environment. Individuals with base height circumference 30 cm in 2011 and 2014 were measured in 55.95 ha of floodplain forest in southern Amap¡ Brazil. The parameters of population dynamics (mortality recruitment and growth) in high and low floodplain environments were determined. Ripleys K function was used to analyse the spatial distribution. Population density in 2011 was 3.99 individual ha­ and in 2014 the density increased to 4.09 individual ha-1. Mortality rate was zero and the recruitment rate was 1.05 year-. Basal area in 2011 was 0.49 m ha- and in 2014 it reached 0.72 m ha-. Diameter growth rate was 5.32 cm year-. The population presented an aggregate distribution pattern. Structural differences in diameter (F 9.15 p 0.003) and basal area (F 10.7 p 0.001) were evident between high and low floodplain forests. The increase in diameter was higher in low floodplain (3.98 cm year-1) compared with high floodplain (1.35 cm year-). The patterns shown by A. excelsa are reflections of its high adaptation to the daily flooded environment.

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Abstract

Attalea excelsa (urucurizeiro) is a dominant palm of the estuarine floodplains with great potential for nontimber management. This study evaluated the population dynamics of urucurizeiro and the factors that contribute to colonising of this species in a flooded environment. Individuals with base height circumference 30 cm in 2011 and 2014 were measured in 55.95 ha of floodplain forest in southern Amap¡ Brazil. The parameters of population dynamics (mortality recruitment and growth) in high and low floodplain environments were determined. Ripleys K function was used to analyse the spatial distribution. Population density in 2011 was 3.99 individual ha­ and in 2014 the density increased to 4.09 individual ha-1. Mortality rate was zero and the recruitment rate was 1.05 year-. Basal area in 2011 was 0.49 m ha- and in 2014 it reached 0.72 m ha-. Diameter growth rate was 5.32 cm year-. The population presented an aggregate distribution pattern. Structural differences in diameter (F 9.15 p 0.003) and basal area (F 10.7 p 0.001) were evident between high and low floodplain forests. The increase in diameter was higher in low floodplain (3.98 cm year-1) compared with high floodplain (1.35 cm year-). The patterns shown by A. excelsa are reflections of its high adaptation to the daily flooded environment.

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Item Type:	Article
AGROVOC Term:	Attalea
AGROVOC Term:	Arecaceae
AGROVOC Term:	Timber
AGROVOC Term:	Palm trees
AGROVOC Term:	Population dynamics
AGROVOC Term:	Forests
AGROVOC Term:	Flooded land
AGROVOC Term:	Topography
AGROVOC Term:	Estuarine environment
AGROVOC Term:	Estuaries
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9053

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