Growth Rings, Increment and Age of Trees in Inundaton Forests, Savannas and a Mountain Forest in the Neotropics

1989

17 Abb., 1 Tab., 35 Lit. Ang.

Unselbständiges Werk

9869

200040204

Investigations on growth zones of tropical trees were carried out and published since the beginning of our century. In tropical regions with severe annual dry seasons or inundation phases trees form annual rings. This is demonstrated for trees from Central Amazonia inundation forests and the Gran Sabana in Venezuela using a combination of several dendrochronological methods (wood anatomy, radiocarbon dating, ring width measurements). The occurrence of annual rings allows the determination of age and growth rate of trees. The growth rate depends on the growth strategy of the species and the growth conditions. At a given site growth rate shows a weak negative correlation with the specific gravity of the wood of trees from the upper story. Several reported ring width patterns are explained by the vegetation history of different forest stands.