Perpendicular 50 m-long lines were established
from each of the six marked transects. Within each line, five
secondary points (10 m from each other) were marked. In each
secondary point, a point-centered quarter (Cottam & Curtis
1956) was established, and the closest individual tree with a
diameter at breast height (DBH) ≥ 47 mm was sampled in each
of the four quadrants, totaling 150 points for each vegetation
type. Subsequently, the individuals were identified to species
level and the density of these was calculated. Field data was
obtained from January to April of 2009. In the plantations,
individuals that were conspecific with the planted trees were
disregarded in the analysis. This precaution was needed
because our main goal was to analyze the arrival of propagules
from outside the stands.