Fast Bacterial Succession Associated with the Decomposition of Larix gmelinii Litter in Wudalianchi Volcano

• Published in: Microorganisms (Basel) Vol. 12; no. 5; p. 948
• Main Authors: Xie, Lihong, Cheng, Jiahui, Cao, Hongjie, Yang, Fan, Jiang, Mingyue, Li, Maihe, Huang, Qingyang
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 07.05.2024
• Subjects: Bacteria; Chemoheterotrophy; Chloroplasts; Community structure; Cyanobacteria; Decomposition; Design of experiments; Ecosystems; Experimental design; Forest ecosystems; Forests; Functional groups; Fungi; Larix gmelinii; Lava; Litter; litter decomposition; Microbial activity; Microorganisms; Next-generation sequencing; Nitrogen; Nutrient cycles; Phosphorus; Plant growth; Terrestrial ecosystems; Volcanic activity; Volcanoes; WDLC volcano; China; Larix gmelinii; litter decomposition; WDLC volcano; bacteria
• DOI: 10.3390/microorganisms12050948
• ISSN: 2076-2607

In order to understand the role of microorganisms in litter decomposition and the nutrient cycle in volcanic forest ecosystems, the dominant forest species in the volcanic lava plateau of the Wudalianchi volcano was considered as the research object. We analyzed the response of bacterial community structure and diversity to litter decomposition for 1 year, with an in situ decomposition experimental design using litter bags and Illumina MiSeq high-throughput sequencing. The results showed that after 365 days, the litter quality residual rate of was 77.57%, and the litter N, P, C:N, C:P, and N:P showed significant differences during the decomposition period ( < 0.05). The phyla Cyanobacteria and the genus were the most dominant groups in early decomposition (January and April). The phyla Proteobacteria, Actinobacteriota, and Acidobacteriota and the genera , , and were higher in July and October. The microbial communities showed extremely significant differences during the decomposition period ( < 0.05), with PCoa, RDA, and litter QRR, C:P, and N as the main factors driving litter bacteria succession. Microbial functional prediction analysis showed that Chloroplasts were the major functional group in January and April. Achemoheterotrophy and aerobic chemoheterotrophy showed a significant decrease as litter decomposition progressed.