Floristic Composition Analysis of Soil Transposition in a Seasonal Forest in Rio Grande do Sul, Brazil

ABSTRACT This study aimed to identify the floristic composition and density of a seed bank transposed from a Seasonal Forest fragment in Rio Grande do Sul. The seed bank of the (BSI) fragment center and edge (BSII) of another forest fragment was also evaluated, both at medium to advanced successional stages. The seed bank was deposited in Brown-Gray Argisol and Red Argisol using exposed soil plots as control. ANOVA followed by Tukey test (p<0.05) were used to compare treatments for density and species richness. The density of individuals did not differ between treatments. Species richness was higher for BSI and BSII treatments in relation to control. The floristic composition presented different life forms, but was mainly composed of herbaceous species. It was concluded that the seed bank from the two donor areas contributed to the expansion of species richness in two soil types.摘要 本研究旨在明确从南里奥格兰德州（Rio Grande do Sul）一处季节性森林（Seasonal Forest）片段移植而来的种子库（seed bank）的植物区系组成与密度。本研究同时评估了另一处处于中至高级演替阶段的森林片段的核心区（BSI）与边缘区（BSII）的种子库。该种子库被播置于棕灰淋溶土（Argisol）与红色淋溶土（Argisol）中，并以裸露土壤样地作为对照组。本研究采用方差分析（ANOVA）结合图基检验（p<0.05）对不同处理的种子密度与物种丰富度进行比较。结果显示，各处理间的个体密度无显著差异；BSI与BSII处理组的物种丰富度显著高于对照组。该植物区系组成包含多种生活型，但以草本植物为主。研究结论表明，两处供体区域的种子库均提升了两种土壤类型中的物种丰富度。