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Ecosystem size-induced environmental fluctuations affect the temporal dynamics of community assembly mechanisms
The ISME Journal ( IF 11.0 ) Pub Date : 2022-08-18 , DOI: 10.1038/s41396-022-01286-9
Raven L Bier 1, 2 , Máté Vass 1 , Anna J Székely 1, 3 , Silke Langenheder 1
Affiliation  

Understanding processes that determine community membership and abundance is important for many fields from theoretical community ecology to conservation. However, spatial community studies are often conducted only at a single timepoint despite the known influence of temporal variability on community assembly processes. Here we used a spatiotemporal study to determine how environmental fluctuation differences induced by mesocosm volumes (larger volumes were more stable) influence assembly processes of aquatic bacterial metacommunities along a press disturbance gradient. By combining path analysis and network approaches, we found mesocosm size categories had distinct relative influences of assembly process and environmental factors that determined spatiotemporal bacterial community composition, including dispersal and species sorting by conductivity. These processes depended on, but were not affected proportionately by, mesocosm size. Low fluctuation, large mesocosms primarily developed through the interplay of species sorting that became more important over time and transient priority effects as evidenced by more time-delayed associations. High fluctuation, small mesocosms had regular disruptions to species sorting and greater importance of ecological drift and dispersal limitation indicated by lower richness and higher taxa replacement. Together, these results emphasize that environmental fluctuations influence ecosystems over time and its impacts are modified by biotic properties intrinsic to ecosystem size.



中文翻译:

生态系统规模引起的环境波动影响群落组装机制的时间动态

了解决定群落成员和丰度的过程对于从理论群落生态学到保护的许多领域都很重要。然而,空间社区研究通常只在一个时间点进行,尽管已知时间变异性对社区组装过程的影响。在这里,我们使用时空研究来确定中宇宙体积(体积越大越稳定)引起的环境波动差异如何影响水生细菌元群落沿压力干扰梯度的组装过程。通过结合路径分析和网络方法,我们发现中宇宙大小类别对组装过程和决定时空细菌群落组成的环境因素有明显的相对影响,包括通过电导率进行的扩散和物种分类。这些过程取决于中宇宙大小,但不受其影响。低波动、大型中宇宙主要是通过物种分类的相互作用发展起来的,物种分类随着时间的推移变得越来越重要,而更多的时间延迟关联证明了这一点。高波动、小的生态系统对物种分类有规律的干扰,生态漂移和扩散限制的重要性更高,这表明较低的丰富度和较高的类群替代。总之,这些结果强调环境波动会随着时间的推移影响生态系统,并且其影响会受到生态系统规模固有的生物特性的影响。大型中宇宙主要是通过物种分类的相互作用发展起来的,物种分类随着时间的推移变得越来越重要,而更多的时间延迟关联证明了瞬态优先效应。高波动、小的生态系统对物种分类有规律的干扰,生态漂移和扩散限制的重要性更高,这表明较低的丰富度和较高的类群替代。总之,这些结果强调环境波动会随着时间的推移影响生态系统,并且其影响会受到生态系统规模固有的生物特性的影响。大型中宇宙主要是通过物种分类的相互作用发展起来的,物种分类随着时间的推移变得越来越重要,而更多的时间延迟关联证明了瞬态优先效应。高波动、小的生态系统对物种分类有规律的干扰,生态漂移和扩散限制的重要性更高,这表明较低的丰富度和较高的类群替代。总之,这些结果强调环境波动会随着时间的推移影响生态系统,并且其影响会受到生态系统规模固有的生物特性的影响。小的生态系统经常破坏物种分类,生态漂移和扩散限制的重要性更高,这表明较低的丰富度和较高的类群替代。总之,这些结果强调环境波动会随着时间的推移影响生态系统,并且其影响会受到生态系统规模固有的生物特性的影响。小的生态系统经常破坏物种分类,生态漂移和扩散限制的重要性更高,这表明较低的丰富度和较高的类群替代。总之,这些结果强调环境波动会随着时间的推移影响生态系统,并且其影响会受到生态系统规模固有的生物特性的影响。

更新日期:2022-08-18
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