Demography and structures population of Actinostemon concolor (Spreng.) Müll. Arg. (Euphorbiaceae) in flooded areas in Southern Brazil

Brazilian Archives of Biology and Technology

Edmilson Bianchini²  Carla Gomes De Araújo¹  Márcia Green¹  José Antonio Pimenta² 

[1] ,Universidade Estadual de Londrina Centro de Ciências Biológicas Departamento de Biologia Animal e VegetalLondrina PR ,Brasil

关键词: elasticity;    matrix models;    spatial distribution;    structure size;    tropical tree;   

DOI  :  10.1590/S1516-89132013000100009

来源: SciELO

【 摘 要 】

The aim of this work was to analyze the size and spatial structures and demography of Actinostemon concolor (Spreng.) Müll. Arg. (Euphorbiaceae) in the flooded areas of Mata dos Godoy State Park. Fifty plots of 100 m² were established and three surveys were conducted. All the individuals were measured, mapped and divided into categories as seedlings, juveniles and adults. The coefficient of skewness, L-function of Ripley, and the matrix population models were used in the study. The population showed positive coefficient of skewness and the individuals were distributed in groups. The population growth rates (λ) were equal or lower than 1.0 and the adult survival and recruitment of juvenile to adult were the vital rates that most affected the values of λ. Considering these results and the unpredictability of the environment, it could be concluded that the individual numbers of A. concolor would fluctuate over time, but the species would remain as one of the most important in the Park.

【 授权许可】

CC BY-NC   
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