Xu Yeteng, Liu Yang, Chen Tuo, Wang Shijin, Liu Guangxiu, Zhang Gaosen, Zhang Wei, Wu Minghui, Chen Ximing, Zhang Binglin
Yulong Snow Station of Cryosphere and Sustainable Development, State Key Laboratory of Cryospheric Science and Frozen Soil Engineering, Northwest Institute of Eco- Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
iScience. 2025 Feb 18;28(3):112061. doi: 10.1016/j.isci.2025.112061. eCollection 2025 Mar 21.
Glacier surface habitats are dynamic ecosystems that respond to local climatic and thermal changes, although the assembly mechanisms of microbial communities in these environments remain unclear. This study examined microbial communities on the surface of Baishui Glacier No. 1 across the accumulation, the intense melt, and the late melt periods. The absolute abundance of Cyanobacteria increased significantly, becoming the most abundant phylum by the end of the melt period. Cyanobacteria were strongly associated with other local microorganisms, especially in community structure, community assembly, and co-occurrence networks. The correlations between Cyanobacteria and other microorganisms shifted from predominantly mutualistic interactions, to being predominantly competitive interactions, and finally to mutualistic interactions with a portion of the community. Additionally, Cyanobacteria abundance positively correlated with nitrogen metabolism multifunctionality in other microorganisms, indicating a potential link between Cyanobacteria and nitrogen cycling. These findings provide new insights into microbial community dynamics and survival strategies on glacier surfaces.
冰川表面栖息地是动态生态系统，会对局部气候和热变化做出响应，尽管这些环境中微生物群落的组装机制仍不清楚。本研究调查了白水一号冰川表面在积累期、强烈融化期和后期融化期的微生物群落。蓝细菌的绝对丰度显著增加，到融化期结束时成为最丰富的门类。蓝细菌与其他当地微生物密切相关，尤其是在群落结构、群落组装和共现网络方面。蓝细菌与其他微生物之间的相关性从主要是互利共生相互作用，转变为主要是竞争相互作用，最后又与一部分群落形成互利共生相互作用。此外，蓝细菌丰度与其他微生物中的氮代谢多功能性呈正相关，表明蓝细菌与氮循环之间存在潜在联系。这些发现为冰川表面微生物群落动态和生存策略提供了新的见解。
