ABSTRACT Background: Invasive plants can negatively impact native communities, but the majority of the effects of these invasions have been demonstrated only for temperate ecosystems. Tropical ecosystems, including the Cerrado, a biodiversity hotspot, are known to be invaded by numerous non-native species, but studies of their impacts are largely lacking. Aims: Our research aimed at quantifying how Pinus spp. presence and density affected Cerrado plant communities. Methods: We sampled areas invaded and non-invaded by Pinus spp. to determine if pine invasion affected native tree richness, diversity, evenness, and density. We also evaluated if community composition differed between invaded and non-invaded sites. Results: We found invaded plots had lower native tree densities than non-invaded plots and that Pinus spp. invasions changed native tree communities by reducing native species abundances. Conclusion: Invasive pines had negative impacts on the native Cerrado tree community by reducing native plant density and changing species abundances. Reduced density and abundance at early invasion stages can result in reduction in biodiversity in the long term.

中文翻译：

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松树入侵降低了塞拉多林地的密度并改变了本地树木群落

摘要背景：入侵植物会对本地群落产生负面影响，但这些入侵的大部分​​影响仅在温带生态系统中得到证实。众所周知，热带生态系统，包括生物多样性热点塞拉多，被许多非本地物种入侵，但在很大程度上缺乏对其影响的研究。目标：我们的研究旨在量化 Pinus spp. 存在和密度影响了塞拉多植物群落。方法：我们对松属植物入侵和未入侵的区域进行了采样。确定松树入侵是否影响本地树木的丰富度、多样性、均匀度和密度。我们还评估了入侵和非入侵站点之间的社区组成是否不同。结果：我们发现入侵地块的原生树木密度低于非入侵地块，并且松属植物。入侵通过减少本地物种的丰度改变了本地树木群落。结论：入侵松树通过降低本地植物密度和改变物种丰度对本地塞拉多树群落产生负面影响。从长远来看，早期入侵阶段的密度和丰度降低会导致生物多样性的减少。