Transient invaders can induce shifts between alternative stable states of microbial communities
Transient invaders can induce shifts between alternative stable states of microbial communities
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DOI：
10.1126/sciadv.aay8676
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发表时间：
2020-02-01
期刊：
影响因子：
13.6
通讯作者：
Gore, Jeff
中科院分区：
文献类型：
--
作者：
Amor, Daniel R.;Ratzke, Christoph;Gore, Jeff
微生物扩散常常导致外来生物进入生态系统。当外来物种的到来导致成功入侵时，外来物种就会在居民群落中建立起来，这可以显着改变生态系统。那些只与社区短暂互动的不成功入侵者的潜在影响看似影响力较小，但在很大程度上仍然被忽视。在这里，我们通过实验证明，这些短暂的入侵可以诱导向替代稳定状态的持久转变，即使入侵物种本身无法在转变中幸存下来。首先，我们对这些短暂的入侵者引起的环境变化如何在简单的双稳态模型系统中驱动群落转变有一个机械的理解。除此之外，我们表明，短暂的入侵者还可以诱导从天然土壤样本中分离出来的更复杂的群落在稳定状态之间的转换。我们的结果表明，与入侵物种的短期相互作用可以引起群落组成和功能的持久变化。
Microbial dispersal often leads to the arrival of outsider organisms into ecosystems. When their arrival gives rise to successful invasions, outsider species establish within the resident community, which can markedly alter the ecosystem. Seemingly less influential, the potential impact of unsuccessful invaders that interact only transiently with the community has remained largely ignored. Here, we experimentally demonstrate that these transient invasions can induce a lasting transition to an alternative stable state, even when the invader species itself does not survive the transition. First, we develop a mechanistic understanding of how environmental changes caused by these transient invaders can drive a community shift in a simple, bistable model system. Beyond this, we show that transient invaders can also induce switches between stable states in more complex communities isolated from natural soil samples. Our results demonstrate that short-term interactions with an invader species can induce lasting shifts in community composition and function.