Liu Xia, Gong Xiaofan, Ma Kai, Song Wen, Zhou Jiayin, Wang Mengqi, Li Yueyue, Ji Mengzhi, Li Yan, Han He, Wang Yuzhuo, Tu Qichao
Institute of Marine Science and Technology, Shandong University, Qingdao, Shandong 266237, China.
Qingdao Key Laboratory of Ocean Carbon Sequestration and Negative Emission Technology, Shandong University, Qingdao, Shandong 266237, China.
ISME Commun. 2025 Feb 17;5(1):ycaf025. doi: 10.1093/ismeco/ycaf025. eCollection 2025 Jan.
Resolving the ecological drivers mediating the diversity patterns of microbial communities across space and through time is a central issue in microbial ecology. Both regional species pools and local community assembly contribute to the spatial turnover of biodiversity. In this study, we extended the concept of regional species pool to temporal, and investigated the seasonal dynamics of intertidal microbiomes across four microbial domains/kingdoms (bacteria, archaea, fungi, and protists). The results showed that the seasonal variations of microbial β-diversity were primarily governed by community assembly processes rather than temporal species pools. Different microbial domains/kingdoms were structured by different ecological processes, with homogeneous selection as the major process for all of them. Additionally, bacteria and fungi were critically shaped by drift, and protists by drift and homogeneous dispersal. Among various factors, temperature was important in shaping the temporal patterns of microbial β-diversity. The fluctuation in temperature was strongly associated with fungi and protists, resulting in high drift of community composition. This study demonstrated that community assembly processes governed the dynamic seasonal β-variations of intertidal microbiomes, expanding our understanding from spatial ecology.
解析介导微生物群落跨空间和时间的多样性模式的生态驱动因素是微生物生态学的核心问题。区域物种库和当地群落构建都对生物多样性的空间周转率有贡献。在本研究中，我们将区域物种库的概念扩展到时间维度，并研究了潮间带微生物群落跨越四个微生物域/界（细菌、古菌、真菌和原生生物）的季节动态。结果表明，微生物β多样性的季节变化主要受群落构建过程而非时间物种库的支配。不同的微生物域/界由不同的生态过程构建，同质化选择是它们共同的主要过程。此外，细菌和真菌受漂变的影响很大，而原生生物则受漂变和同质化扩散的影响。在各种因素中，温度对塑造微生物β多样性的时间模式很重要。温度波动与真菌和原生生物密切相关，导致群落组成的高漂变。本研究表明，群落构建过程支配着潮间带微生物群落动态的季节性β变化，扩展了我们从空间生态学角度的理解。
