Light conditions affect Myrcia splendens (Sw.) DC. functional traits in an Atlantic Forest, Southeast, Brazil

As condições de luz afetam os atributos funcionais de Myrcia splendens (Sw.) DC. em um fragmento de Mata Atlântica, Sudeste, Brasil

ABSTRACT

Solar radiation is one of the aspects which most influence species composition, so light is a limiting factor to tree growth in forests. This study aimed to evaluate the leaf morphological variations between individuals of the Myrcia splendens (Sw.) DC. species under different light conditions in an urban forest. The fragment is characterized by having an open canopy area and an advanced regeneration stage in which branches of five individuals were collected, totaling 100 leaves. The traits evaluated were leaf area, fresh biomass, dry biomass, water content, specific leaf area and leaf dry matter content. An analysis of variance showed that most of the morphological traits (dry biomass, specific leaf area, leaf dry matter content) varied significantly. Furthermore, variables such as dry biomass, water content and leaf area showed a high correlation with fresh biomass in both areas. The morphological variation found in M. splendens allows for creating growth and establishment strategies according to the environmental conditions.

Keywords:
functional traits; leaf plasticity; light; shade; survival strategy