Monteiro Moreira Geisianny Augusta, Martins do Vale Helson Mario
Microbial Biology Graduate Program, Biological Sciences Institute, Universidade de Brasília, Campus Darcy Ribeiro, Asa Norte, 70910-900 Brasília/DF, Brazil.
Laboratory of Mycology, Department of Phytopathology, Biological Sciences Institute, Universidade de Brasília, Campus Darcy Ribeiro, Asa Norte, 70910-900 Brasília/DF, Brazil.
Microorganisms. 2020 Jul 24;8(8):1116. doi: 10.3390/microorganisms8081116.
Yeasts represent an important component of the soil microbiome. In central Brazil, mining activities are among the main anthropogenic factors that influence the dynamics of the soil microbiota. Few studies have been dedicated to analysis of tropical soil yeast communities, and even fewer have focused on Brazilian hotspots influenced by mining activity. The aim of the current study was to describe soil yeast communities in a post-mining site with revegetated and native areas, along Neotropical Savanna and Atlantic Forest biomes. Yeast communities were described using a culture-based method and estimator-based species accumulation curves, and their associations with environmental characteristics were assessed using multivariate analysis. The results indicate a greater species richness for yeast communities in the revegetated area. We identified 37 species describing 86% of the estimated richness according to Chao2. Ascomycetous yeasts dominated over basidiomycetous species. was the most frequent species in two phytocenoses. Red-pigmented yeasts were frequent only in the summer. The main soil attributes affecting yeast communities were texture and micronutrients. In conclusion, each phytocenosis showed a particular assemblage of species as a result of local environmental phenomena. The species richness in a Revegetated area points to a possible ecological role of yeast species in environmental recovery. This study provided the first comprehensive inventory of soil yeasts in major phytocenoses in Minas Gerais, Brazil.
酵母是土壤微生物群落的重要组成部分。在巴西中部，采矿活动是影响土壤微生物群动态的主要人为因素之一。很少有研究致力于热带土壤酵母群落的分析，而关注受采矿活动影响的巴西热点地区的研究更少。本研究的目的是描述新热带稀树草原和大西洋森林生物群落中一个采矿后场地的土壤酵母群落，该场地包括植被恢复区和原生区。采用基于培养的方法和基于估计器的物种积累曲线来描述酵母群落，并使用多变量分析评估它们与环境特征的关联。结果表明，植被恢复区的酵母群落物种丰富度更高。根据Chao2估计，我们鉴定出37个物种，占估计丰富度的86%。子囊菌酵母比担子菌酵母占优势。是两个植物群落中最常见的物种。红色色素酵母仅在夏季常见。影响酵母群落的主要土壤属性是质地和微量营养素。总之，由于当地环境现象，每个植物群落都表现出特定的物种组合。植被恢复区的物种丰富度表明酵母物种在环境恢复中可能具有生态作用。本研究首次全面清查了巴西米纳斯吉拉斯州主要植物群落中的土壤酵母。
