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<p>We sought to understand how relief features act as environmental filters, altering the floristic and structural patterns of tropical seasonal forests. To this end, we raised the following question: how can relief characteristics influence the structure and species composition of seasonal forest fragments? We aimed to assess how the functional characteristics (height and basal area), structural characteristics (density) and composition of tree species can vary according to the relief. Samplings were performed in the Serra da Bodoquena National Park (SBNP), Cerrado biome, Mato Grosso do Sul, Brazil. We selected ten sampling areas at different altitudes (173–549&#xa0;m) and geomorphological features. In each area we sampled the trees using the Point Center Quarter method. We established 20 quarter points in each area, with a minimum distance of 15&#xa0;m between points, totaling a 300&#xa0;m line. In each quadrant, we recorded the nearest tree and its distance to the center, basal area, and height. From these data, we calculated diversity, importance value and species richness in each sampled area and the phytosociological variables (density, frequency, abundance, and species composition) and used generalized linear models to relate these variables with geomorphological data. We recorded 117 taxa, Fabaceae being the most representative family (21 species), and the species with the highest importance value were <i>Urera caracasana</i> (IV = 30.97), <i>Anadenanthera colubrina</i> (IV = 28.5) and <i>Plenadenophora membranifolia</i> (IV = 26.25). We observed increased tree height and basal area with increased altitude and a reduction in tree density according to increased declivity. Species composition also varied with altitude and legumes were less frequent in lower and plane areas. The variation of altitude and declivity of the terrain alters structural patterns and species composition of seasonal forests. We emphasize that species with high importance value can be recommended in ecological restoration programs of forest fragments.</p>

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Relief determines patterns of structure and composition of tree vegetation in seasonal forests in the Brazilian Cerrado

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Maxwell R. Oliveira,
  • Francielli Bao,
  • Evaldo B. Souza,
  • Arnildo Pott,
  • Rosa H. Silva,
  • Pedro Isaac,
  • Joanice Lube Battilani,
  • Vivian Ribeiro Baptista Maria,
  • Edna Scremin-Dias,
  • Vali Joana Pott,
  • Alexandre de Matos Martins Pereira,
  • Geraldo A. Damasceno Junior

摘要

We sought to understand how relief features act as environmental filters, altering the floristic and structural patterns of tropical seasonal forests. To this end, we raised the following question: how can relief characteristics influence the structure and species composition of seasonal forest fragments? We aimed to assess how the functional characteristics (height and basal area), structural characteristics (density) and composition of tree species can vary according to the relief. Samplings were performed in the Serra da Bodoquena National Park (SBNP), Cerrado biome, Mato Grosso do Sul, Brazil. We selected ten sampling areas at different altitudes (173–549 m) and geomorphological features. In each area we sampled the trees using the Point Center Quarter method. We established 20 quarter points in each area, with a minimum distance of 15 m between points, totaling a 300 m line. In each quadrant, we recorded the nearest tree and its distance to the center, basal area, and height. From these data, we calculated diversity, importance value and species richness in each sampled area and the phytosociological variables (density, frequency, abundance, and species composition) and used generalized linear models to relate these variables with geomorphological data. We recorded 117 taxa, Fabaceae being the most representative family (21 species), and the species with the highest importance value were Urera caracasana (IV = 30.97), Anadenanthera colubrina (IV = 28.5) and Plenadenophora membranifolia (IV = 26.25). We observed increased tree height and basal area with increased altitude and a reduction in tree density according to increased declivity. Species composition also varied with altitude and legumes were less frequent in lower and plane areas. The variation of altitude and declivity of the terrain alters structural patterns and species composition of seasonal forests. We emphasize that species with high importance value can be recommended in ecological restoration programs of forest fragments.