Federal University of Latin American Integration (UNILA), Institute Latin American of Nature and Life Sciences (ILACNV), Interdisciplinary Center of Life Sciences (CICV), 1000 Tarquínio Joslin dos Santos Av., Jardim Universitário, Foz do Iguaçu, PR, 85870-901, Brazil.
BMC Microbiol. 2022 Jan 5;22(1):10. doi: 10.1186/s12866-021-02431-8.
Changes in the fungal community in the litter decomposition by invasive plants can negatively impact nutrient cycling in natural ecosystems. One still does not know the dimension of this hypothesis, but apparently, it is not despicable. This study evaluated the assemblage composition of fungi during litter decomposition in areas of Atlantic Forest invaded or not invaded by Tradescantia zebrina using Illumina MiSeq and metabarcoding analysis.
The invaded sample showed significantly higher richness and a difference in the species dominance than the invaded litter. Ascomycota was the first most abundant phylum in both areas. Even so, the dissimilarity between areas can be evidenced. The fungal from Basidiomycota were very representative in the non-invaded areas (ranged from an abundance of 43.29% in the non-invaded to 2.35% in the invaded sample). The genus Lepiota can indicate the primary functional group related to biomass degradation and showed the might difference about the invaded areas due to its essential reduction by the invader. In the invaded sample, there was a total absence of the endophyte-undefined saprotroph guild. Also, some genera not taxonomically characterized were eliminated in the invaded sample, revealing that the fungal biodiversity of areas has not yet been thoroughly characterized.
Hence, makes impossible the real interpretation of the invasive plant impact, showing the importance of continuing research on fungal biodiversity. It is important to emphasize that the replacement of the native species by T. zebrina may be responsible for the elimination of fungal groups that have not yet been identified.
入侵植物凋落叶分解过程中真菌群落的变化可能会对自然生态系统的养分循环产生负面影响。目前人们还不清楚这一假设的程度，但显然这并不是微不足道的。本研究使用 Illumina MiSeq 和代谢组学分析，评估了被入侵或未被入侵的大西洋森林地区Tradescantia zebrina 凋落叶分解过程中真菌的组合组成。
入侵样本的丰富度显著较高，且物种优势度与入侵凋落叶存在差异。子囊菌门在两个地区均为最丰富的第一大菌群。即便如此，仍可证明两个地区的真菌存在差异。在未受入侵的地区，担子菌门的真菌非常具有代表性（从未受入侵地区的丰度 43.29%到入侵地区的 2.35%不等）。Lepiota 属可以指示与生物量降解相关的主要功能群，由于入侵植物的入侵，其在入侵地区的丰度存在显著差异。在入侵样本中，完全不存在内生-腐生菌团。此外，一些未分类的属在入侵样本中也被消除了，这表明这些地区的真菌生物多样性尚未得到充分的描述。
因此，由于入侵植物的影响，无法对其进行真正的解释，这表明继续研究真菌生物多样性的重要性。需要强调的是，由 T. zebrina 替代本地物种可能是导致尚未鉴定的真菌类群被消除的原因。
