Title

POPULATION STRUCTURE OF Araucaria angustifolia IN THE IGUAÇU NATIONAL PARK.

Authors

Albiero Junior, Alci; Godinho Temponi, Lívia; Galvão, Franklin; Botosso, Paulo Cesar; Bittencourt Guimarães, Ana Tereza

Abstract

The aim of this study was to analyze the population structure, regeneration and spatial distribution of Araucaria angustifolia (Bertol.) Kuntz. within a natural forest and in forest edge with agricultural monoculture. All araucaria individuals from 10 cm high were recorded in 200 plots of 10 x 10 m. 479 individuals were sampled (416 at the edge and 63 inside). Of these, 33 were females, 37 males, 49 juveniles and 360 regenerating individuals. The population structure performance was similar to standard inverted-J. Regenerating individuals had mainly the aggregate distribution pattern, while juveniles, males and females had a uniform pattern. Density of the canopy affected frequency of the individuals, where higher frequencies at higher densities were observed, indicating that regeneration of this species is more effective in shadowed environments. Due to the large number of individuals sampled in different size classes, the Iguaçu National Park is an important conservation remaining of A. angustifolia.

Subjects

BRAZILIAN pine; PLANT canopies; PHYTOGEOGRAPHY

Publication

Floresta, 2015, Vol 45, Issue 2, p361

ISSN

0015-3826

Publication type

Academic Journal

DOI

10.5380/rf.v45i2.35673