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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Different slopes of a mountain can determine the structure of ferns and lycophytes communities in a tropical forest of Brazil
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Different slopes of a mountain can determine the structure of ferns and lycophytes communities in a tropical forest of Brazil

机译：一座山的不同坡度可以确定巴西热带森林中蕨类和苔藓植物群落的结构

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摘要

A community of Ferns and Lycophytes was investigated by comparing the occurrence of species on different slopes of a paleoisland in Southeastern Brazil. Our goal was to evaluate the hypothesis that slopes with different geographic orientations determine a differentiation of Atlantic Forest ferns and lycophytes community. We recorded these plants at slopes turned towards the continent and at slopes turned towards the open sea. Analysis consisted of a preliminary assessment on fern beta diversity, a Non Metric Multidimensional Scaling (NMDS) and a Student t-test to confirm if sites sampling units ordination was different at each axis. We further used the Pearson coefficient to relate fern species to the differentiation pattern and again Student's t-test to determine if richness, plant cover and abundance varied between the two sites. There was a relatively low number of shared species between the two sites and ferns and lycophytes community variation was confirmed. Some species were detected as indicators of the community variation but we were unable to detect richness, plant cover or abundance differences. Despite the evidence of this variation between the slopes, further works are needed to evaluate which processes are contributing to determine this pattern.
机译：通过比较巴西东南部古土壤不同斜坡上物种的发生，研究了蕨类和苔藓植物群落。我们的目标是评估以下假设：具有不同地理位置的坡度决定了大西洋森林蕨类植物和苔藓植物群落的分化。我们记录了这些植物在向大陆倾斜的斜坡和向公海倾斜的斜坡上的情况。分析包括对蕨类植物β多样性的初步评估，非度量多维标度（NMDS）和学生t检验，以确认每个轴上的采样单位排序是否不同。我们进一步使用Pearson系数将蕨类物种与分化模式相关联，再次使用Student's t检验确定两个站点之间的丰度，植物覆盖率和丰度是否发生变化。两个地点之间的共有物种相对较少，并且蕨类植物和苔藓植物群落变异得到确认。一些物种被检测为群落变异的指标，但我们无法检测到其丰富度，植物覆盖率或丰度差异。尽管有坡度之间这种变化的证据，但仍需要进一步的工作来评估哪些过程正在决定这种模式。

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