Disturbances can facilitate prior invasions more than subsequent invasions in microbial communities,Ecology Letters

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Disturbances can facilitate prior invasions more than subsequent invasions in microbial communities
Ecology Letters ( IF 7.6 ) Pub Date : 2024-08-14 , DOI: 10.1111/ele.14493
Luke Lear ₁ , Elze Hesse ₁ , Angus Buckling ₁

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Invasions are commonly found to benefit from disturbance events. However, the importance of the relative timing of the invasion and disturbance for invader success and impact on community composition remains uncertain. Here, we experimentally test this by invading a five‐species bacterial community on eight separate occasions—four before a disturbance and four after. Invader success and impact on community composition was greatest when the invasion immediately followed the disturbance. However, the subsequent invasions had negligible success or impact. Pre‐disturbance, invader success and impact was greatest when the invader was added just before the disturbance. Importantly, however, the first three pre‐disturbance invasion events had significantly greater success than the last three post‐disturbance invasions. Moreover, these findings were consistent across a range of propagule pressures. Overall, we demonstrate that timing is highly important for both the success and impact on community composition of an invader, with both being lower as time since disturbance progresses.

中文翻译：

在微生物群落中，干扰比后续入侵更能促进先前的入侵

人们通常发现入侵可以从干扰事件中受益。然而，入侵和干扰的相对时间对于入侵者成功的重要性以及对群落组成的影响仍然不确定。在这里，我们通过在八个不同的场合入侵五种细菌群落来对此进行实验测试——四次在干扰之前，四次在干扰之后。当干扰发生后立即入侵时，入侵者的成功和对群落组成的影响最大。然而，随后的入侵的成功或影响微乎其微。当入侵者在干扰之前添加时，干扰前、入侵者的成功和影响最大。然而，重要的是，前三个扰动前入侵事件比后三个扰动后入侵事件取得了更大的成功。此外，这些发现在一系列繁殖压力下是一致的。总体而言，我们证明时机对于入侵者的成功和对群落组成的影响都非常重要，随着干扰的进展，两者都随着时间的推移而降低。

更新日期：2024-08-14

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