Taxa de regeneração natural na floresta tropical úmida.

This note presents a mathematical model using values far abundance to express the rate of natural regeneration in tropical forests. The proposed model is the following:

tr = { (A₁/A₀) - 1 }. 100, where:

tr = rate οf natural regeneration in percent;

A = abundance, as definid by Jardim (1985);

A₁ = A₀ + ne - ns = final abundance;

Α₀ = initial abundance;

ne = in put of new individuals during the study period, by germination or change in size class;

ns = out put of individuals during the study period, by death or change in size class;

1 = constant which indicates mortality.

The results show that the forest is in a dynamic equilibrium, because the rate of natural regeneration was found to be + 0,10%. This rate can be used to describe the behavior of species, groups of species, or for the forest as a whole.