Garbin Mário L, Misaki Flora, Ferreira Poliana F, Guidoni-Martins Karlo G, Soares Rayara B, Mariotte Pierre, Sansevero Jerônimo B B, Rocha Patryck Gouvea, Silva Ary G
Programa de Pós-Graduação em Ecologia de Ecossistemas Universidade Vila Velha Vila Velha Brazil.
Programa de Pós-Graduação em Ecologia e Evolução Universidade Federal de Goiás Goiânia Brazil.
Ecol Evol. 2018 May 4;8(11):5712-5723. doi: 10.1002/ece3.4111. eCollection 2018 Jun.
Sandy coastal plant communities in tropical regions have been historically under strong anthropic pressure. In Brazil, these systems shelter communities with highly plastic plant species. However, the potential of these systems to regenerate without human assistance after disturbances has hardly been examined. We determined the natural regeneration of a coastal sandy plain vegetation (restinga) in Brazil, 16 years after the end of sand removal. We inventoried 38 plots: 20 within a sand-mined site and 18 in an adjacent undisturbed site. We expected lower diversity values in the sand-mined site compared to the undisturbed site, but similar species composition between the two sites due to the spatial proximity of the two sites and the high plasticity of restinga species. Species were ranked using abundance and importance value index in both sites, and comparisons were performed using Rényi entropy profiles, rarefaction curves, principal component analysis, and redundancy analysis. Species composition and dominant species differed markedly between the two sites. Bromeliads and , well-known nurse plants, dominated the undisturbed site but were almost absent in the regenerating site. Species richness did not differ between both sites, but diversity was higher in the undisturbed site. Within-site composition differences in the mined area were associated with field characteristics. Interestingly, species classified as subordinate or rare in the undisturbed site became dominants in the regenerating site. These newer dominants in the sand-mined site are not those known as nurse plants in other restingas, thus yielding strong implications for restoration.
热带地区的沙质海岸植物群落一直以来都承受着巨大的人为压力。在巴西，这些系统庇护着具有高度可塑性植物物种的群落。然而，这些系统在受到干扰后无需人类协助就能再生的潜力几乎从未被研究过。我们确定了巴西一处沿海沙质平原植被（滨海沙原植被）在采砂活动结束16年后的自然再生情况。我们对38个样地进行了清查：20个位于采砂场，18个位于相邻的未受干扰区域。我们预计采砂场的多样性值低于未受干扰区域，但由于两个区域空间距离较近且滨海沙原植被物种具有高度可塑性，预计两个区域的物种组成相似。在两个区域都使用丰度和重要值指数对物种进行排序，并使用雷尼熵分布、稀疏曲线、主成分分析和冗余分析进行比较。两个区域的物种组成和优势物种存在显著差异。凤梨科植物以及著名的护养植物在未受干扰区域占主导地位，但在再生区域几乎不存在。两个区域的物种丰富度没有差异，但未受干扰区域的多样性更高。矿区内的区域组成差异与实地特征有关。有趣的是，在未受干扰区域被归类为从属或稀有的物种在再生区域成为了优势物种。采砂场中这些新的优势物种并非其他滨海沙原植被中已知的护养植物，因此对恢复工作具有重要意义。
