Phytosociology of Native Species in the Understory of a Corymbia citriodora Stand in Espírito Santo State, Brazil

ABSTRACT This study is based on the hypothesis that unmanaged plantations of commercial species do not prevent understory colonization by native species. The research aimed to describe the floristic composition and structure of native arboreal species in the understory of a Corymbia citriodora stand. To this end, 112 plots (10 × 10 m; 1.12 ha) were installed. Six hundred native tree individuals distributed in 54 species, 44 genera, and 20 families were recorded. The regeneration diversity and evenness indices were 3.23 and 0.81, respectively. Native regeneration of C. citriodora understory shows features typical of semideciduous seasonal forests and seems to be at the early stage of regeneration. Results suggest that C. citriodora stands do not prevent understory colonization by native species.

摘要 本研究基于以下假说：未受经营管理的商用树种人工林并不会阻碍本土物种对林下层的定植。本研究旨在描述柠檬桉（Corymbia citriodora）林分林下层本土乔木物种的区系组成与结构特征。为此，共设置112个样地（10×10米，总面积1.12公顷）。共记录到600株本土乔木个体，隶属于54种、44属及20个科。其更新群落的多样性指数与均匀度指数分别为3.23与0.81。柠檬桉林下层的本土更新群落呈现出半落叶季节性森林的典型特征，且似乎处于更新演替的早期阶段。研究结果表明，柠檬桉林分并不会阻碍本土物种对林下层的定植。