韦革宏、焦硕等《Soil Biology & Biochemistry》2024年

论文题目：Bridging ecological processes to diversity formation and functional profiles in belowground bacterial communities

论文作者：Beibei Chen, Ziheng Peng, Shi Chen, Yu Liu, Jiejun Qi, Haibo Pan, Hang Gao, Jiamin Gao, Chunling Liang, Jiai Liu, Xun Qian, Xiao Zhang, Sanfeng Chen, Jizhong Zhou, Gehong Wei* and Shuo Jiao*

论文摘要：

Soil microbial diversity plays a critical role in maintaining ecosystem function and services. Understanding the mechanisms underpinning the generation and maintenance of soil microbial diversity is a key focus of ecology. Here, we examined how dispersal and environmental selection affected soil bacterial diversity and their related metabolic functions by leveraging large-scale cross-biome soil surveys of ~1400 samples from diverse ecosystems across China, including agricultural, forest, grassland, and wetland soils. Our results showed that high dispersal increased α-diversity and decreased β-diversity, whereas strong selection generated the opposite pattern in various ecosystems. We also showed that bacterial phylotypes positively associated with dispersal and selection exhibited distinct metabolic diversity. In addition, the complexity of taxon associations increased when communities had higher selection increasing β-diversity. Our study establishes the predictive links of community assembly processes to microbial diversity, function traits, and species coexistence, thus facilitating a better understanding of the mechanisms underlying biodiversity formation and main.

土壤微生物多样性在维持生态系统功能与服务方面发挥重要作用。深入探究土壤微生物多样性的形成与维持机制，一直是生态学研究领域的热点与核心。本研究对不同生态系统（农田、森林、草地和湿地）的土壤样本进行大规模采集（约1400个），探究扩散和选择对细菌多样性形成和代谢功能的影响。研究结果表明，较高的扩散速率增加细菌α多样性并减少细菌β多样性，而较强的环境选择在各种生态系统中产生了相反的模式。本研究还表明，与扩散和选择正相关的细菌谱系类型表现出不同的代谢多样性。此外，当群落受到的选择作用增强时，β多样性增加，共发生网络复杂性也增加。我们的研究建立了群落组装过程与微生物多样性、功能性状和物种共存之间的预测联系，有助于全面理解生物多样性形成与维持的机制。

论文链接：https://doi.org/10.1016/j.soilbio.2024.109573