Deciphering community assembly processes of the microbial community in subtropical coastal-estuarine seawater over a 6-year exploration.

IF 5.1 Q1 ECOLOGY
ISME communications Pub Date : 2025-05-30 eCollection Date: 2025-01-01 DOI:10.1093/ismeco/ycaf091
Yu Wang, Qiongqiong Yang, Qi Chen, Shengwei Hou, Nianzhi Jiao, Qiang Zheng
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Abstract

Understanding community assembly in ecosystems is crucial for ecology, yet the interplay between selection and dispersal remains unclear. We examined bacterial and microeukaryotic communities in a dynamic estuarine-coastal ecosystem over six years to investigate the roles of dispersal and environmental selection. Our approach combined species-time relationships (STRs) analysis, a temporal approach focusing on colonization and extinction dynamics, and a process model for community dynamics, revealing insights into the interplay between selection and dispersal along environmental gradients. Both communities showed significant STRs, but their responses varied by taxon and environmental conditions. For bacteria, salinity increased STR exponents, indicating faster richness growth over time, whereas microeukaryotic STR exponents decreased, suggesting distinct assembly mechanisms. Higher salinity reduced bacterial community determinism but heightened it for microeukaryotes, affecting community turnover: microeukaryote turnover decreased with rising salinity due to changes in colonization and extinction, while bacterial turnover increased due to slower dynamics. This study highlights the complex interaction between selection and dispersal, shaped by environmental factors and unique microbial traits, emphasizing the need for tailored conservation strategies in fluctuating coastal ecosystems.

亚热带沿海-河口海水微生物群落群落组装过程的6年探索。
了解生态系统中的群落聚集对生态学至关重要,但选择和分散之间的相互作用仍不清楚。我们研究了6年来动态河口-海岸生态系统中的细菌和微真核生物群落,以研究扩散和环境选择的作用。我们的方法结合了物种-时间关系(STRs)分析、专注于定殖和灭绝动态的时间方法以及群落动态的过程模型,揭示了沿着环境梯度的选择和扩散之间的相互作用。两种群落均表现出显著的str,但其响应因分类群和环境条件而异。对于细菌来说,盐度增加了STR指数,表明随着时间的推移丰富度增长更快,而微真核生物的STR指数下降,表明不同的组装机制。较高的盐度降低了细菌群落的决定论,但提高了微真核生物的决定论,影响了群落更替:微真核生物的更替随着盐度的升高而减少,这是由于定植和灭绝的变化,而细菌的更替由于较慢的动力学而增加。该研究强调了环境因素和独特微生物特征形成的选择和扩散之间复杂的相互作用,强调了在波动的沿海生态系统中定制保护策略的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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