Changes in Community Structure and Functional Characteristics of Soil Bacteria and Fungi along Karst Vegetation Succession

作者：Yuanyong Li, Qian Tang, Congjun Yuan, Sixi Zhu, Yuyan Ye, Peng Wu, Yingchun Cui, Fangjun Ding · 发表于：Forests · 年份：2023 · DOI：10.3390/f14081562 · 被引用次数：7 · 研究领域：Microbial Community Ecology and Physiology、Mycorrhizal Fungi and Plant Interactions、Soil Carbon and Nitrogen Dynamics

Soil microbes are a crucial component of karst ecosystems, and exploring their community changes during succession can help to elucidate the mechanisms driving succession dynamics. However, the variation of soil microbial communities during vegetation succession in karst ecosystems is still poorly understood. We studied the variations in community structure and potential functions of soil microbes within the four successional stages of grassland (GL), shrubland (SL), secondary forest (SF), and primary forest (PF) for the topsoil (0–10 cm) and subsoil (10–20 cm) in a karst area using high-throughput sequencing. The research findings showed that the bacterial and fungal community diversity and composition changed more obviously in the topsoil than in the subsoil across the succession. With vegetation succession, the structural and functional characteristics of soil bacterial and fungal communities show different trends, with soil fungal communities having a greater response to successional stage changes. Actinobacteria and Acidobacteria were dominant in secondary and primary forests, respectively, while Bacteroidetes was prevalent in grassland. However, the change in Proteobacteria was not significant at both soil depths. Ascomycota was the dominant phylum of soil fungi throughout the succession. The function of soil bacteria was mainly carbohydrate metabolism, which had the highest proportion in the shrubland at different soil depths. The dominant fungal functional groups were...