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Does functional redundancy affect ecological stability and resilience? A review and meta‐analysis

机译：功能冗余是否会影响生态稳定性和弹性？审查和荟萃分析

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In light of rapid shifts in biodiversity associated with human impacts, there is an urgent need to understand how changing patterns in biodiversity impact ecosystem function. Functional redundancy is hypothesized to promote ecological resilience and stability, as ecosystem function of communities with more redundant species (those that perform similar functions) should be buffered against the loss of individual species. While functional redundancy is being increasingly quantified, few studies have linked differences in redundancy across communities to ecological outcomes. We conducted a review and meta‐analysis to determine whether empirical evidence supports the asserted link between functional redundancy and ecosystem stability and resilience. We reviewed 423 research articles and assembled a data set of 32 studies from 15 articles across aquatic and terrestrial ecosystems. Overall, the mean correlation between functional redundancy and ecological stability/resilience was positive. The mean positive effect of functional redundancy was greater for studies in which redundancy was measured as species richness within functional groups (vs. metrics independent of species richness), but species richness itself was not correlated with effect size. The results of this meta‐analysis indicate that functional redundancy may positively affect community stability and resilience to disturbance, but more empirical work is needed including more experimental studies, partitioning of richness and redundancy effects, and links to ecosystem functions.
机译：根据与人类影响相关的生物多样性的快速变化，迫切需要了解生物多样性影响生态系统功能的变化模式的变化。功能冗余是假设的，以促进生态恢复力和稳定性，因为社区的生态系统函数与更多的冗余物种（执行类似功能的人），应缓冲对单个物种的损失进行缓冲。虽然功能冗余正在越来越多地量化，但很少有研究对社区横跨社区的冗余差异与生态结果相关联。我们进行了审查和荟萃分析，以确定经验证据是否支持功能冗余和生态系统稳定性和恢复力之间的断言联系。我们审查了423篇研究文章，并从水生和陆地生态系统的15篇文章中组建了32项研究。总体而言，功能冗余和生态稳定性/弹性之间的平均相关性是正的。功能冗余的平均阳性效果更大，因为在官能团中作为物种丰富度测量冗余的研究（与物种丰富无关的比率），但物种丰富性本身与效果大小无关。该荟萃分析的结果表明，功能冗余可能会对社区稳定性和弹性来产生扰乱，但需要更多的经验工作，包括更多的实验研究，对丰富和冗余效果的分区，以及与生态系统功能的联系。

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