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Abstract：
Microorganisms are important members of seagrass bed ecosystems and play a crucial role in maintaining the health of seagrasses and the ecological functions of the ecosystem. In this study, we systematically quantified the assembly processes of microbial communities in fragmented seagrass beds and examined their correlation with environmental factors. Concurrently, we explored the relative contributions of species replacement and richness differences to the taxonomic and functional β-diversity of microbial communities, investigated the potential interrelation between these components, and assessed the explanatory power of environmental factors. The results suggest that stochastic processes dominate community assembly. Taxonomic β-diversity differences are governed by species replacement, while for functional β-diversity, the contribution of richness differences slightly outweighs that of replacement processes. A weak but significant correlation (p < 0.05) exists between the two components of β-diversity in taxonomy and functionality, with almost no observed significant correlation with environmental factors. This implies significant differences in taxonomy, but functional convergence and redundancy within microbial communities. Environmental factors are insufficient to explain the β-diversity differences. In conclusion, the assembly of microbial communities in fragmented seagrass beds is governed by stochastic processes. The patterns of taxonomic and functional β-diversity provide new insights and evidence for a better understanding of these stochastic assembly rules. This has important implications for the conservation and management of fragmented seagrass beds.
摘要：
微生物是海草床生态系统的重要成员，在维持海草的健康和生态系统的生态功能中起着至关重要的作用。在这项研究中,我们系统地量化了破碎的海草床中微生物群落的组装过程，并研究了它们与环境因素的相关性。同时,我们探讨了物种替代和丰富度差异对微生物群落分类学和功能β多样性的相对贡献，调查了这些成分之间潜在的相互关系，并评估了环境因素的解释力。结果表明，随机过程主导了社区组装。分类学β多样性差异受物种替换支配，而对于功能性β-多样性，丰富度差异的贡献略大于替换过程的贡献。在分类学和功能性方面，β多样性的两个组成部分之间存在微弱但显著的相关性(p<0.05)。几乎没有观察到与环境因素的显著相关性。这意味着分类法的显著差异，而是微生物群落内的功能趋同和冗余。环境因素不足以解释β多样性的差异。总之,分散的海草床中微生物群落的组装受随机过程控制。分类和功能β多样性的模式为更好地理解这些随机组装规则提供了新的见解和证据。这对破碎海草床的保护和管理具有重要意义。
