Dai Wei, Liu Yang, Yao Dandan, Wang Ning, Shao Jinpeng, Ye Xianfeng, Cui Zhongli, Zong Hao, Tian Lei, Chen XiuZhai, Wang Hui
CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100000, China; University of Chinese Academy of Sciences, Nanjing 211135, China.
Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
Sci Total Environ. 2024 Jan 1;906:167255. doi: 10.1016/j.scitotenv.2023.167255. Epub 2023 Sep 22.
Predatory myxobacteria are important soil micropredators with the potential to regulate soil microbial community structure and ecosystem function. However, the biogeographic distribution patterns, assembly processes, and potential nutrient cycling functions of myxobacteria communities in typical agricultural soils in China are still poorly understood. High-throughput sequencing, phylogenetic zero modeling, and the multi-nutrient cycling index were used to assess the biogeographic distribution, assembly processes, and soil ecosystem functions of predation myxobacteria communities in typical agricultural soils of six long-term fertilization ecological experimental stations. The results demonstrated a hump-shaped distribution of myxobacteria α-diversity along the latitudinal gradient and significant differences in myxobacteria β-diversity in typical agricultural soils (P < 0.05). Bacterial richness, soil organic carbon, and pH were the most important predictors of myxobacteria α-diversity, whereas geographic factors and soil pH were the most significant ecological predictors of myxobacteria β-diversity. Myxobacteria community assembly is dominated by deterministic processes, especially homogeneous selection, primarily driven by soil pH and bacterial richness. In addition, we revealed the ecological significance of myxobacteria communities in typical agricultural soil microbial networks and the potential link between myxobacteria communities and soil nutrient cycling. These findings enhance our understanding of the biogeographic distribution, community assembly, ecological predictors, and relationships with soil nutrient cycling of myxobacteria communities in typical agricultural soils, paving the way for a more predictive understanding of the effect of predatory myxobacteria communities on soil ecosystem function, which is essential for the development of sustainable agriculture.
掠食性黏细菌是重要的土壤微捕食者，具有调节土壤微生物群落结构和生态系统功能的潜力。然而，中国典型农业土壤中黏细菌群落的生物地理分布模式、组装过程和潜在的养分循环功能仍知之甚少。利用高通量测序、系统发育零模型和多养分循环指数，评估了6个长期施肥生态实验站典型农业土壤中掠食性黏细菌群落的生物地理分布、组装过程和土壤生态系统功能。结果表明，黏细菌α多样性沿纬度梯度呈驼峰状分布，典型农业土壤中黏细菌β多样性存在显著差异（P < 0.05）。细菌丰富度、土壤有机碳和pH值是黏细菌α多样性最重要的预测因子，而地理因素和土壤pH值是黏细菌β多样性最显著的生态预测因子。黏细菌群落组装主要由确定性过程主导，尤其是同质选择，主要受土壤pH值和细菌丰富度驱动。此外，我们揭示了典型农业土壤微生物网络中黏细菌群落的生态意义，以及黏细菌群落与土壤养分循环之间的潜在联系。这些发现加深了我们对典型农业土壤中黏细菌群落的生物地理分布、群落组装、生态预测因子以及与土壤养分循环关系的理解，为更具预测性地理解掠食性黏细菌群落对土壤生态系统功能的影响铺平了道路，这对可持续农业的发展至关重要。
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