The legacy of bacterial invasions on soil native communities
The legacy of bacterial invasions on soil native communities
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DOI：
10.1111/1462-2920.15086
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发表时间：
2020-06-10
影响因子：
5.1
通讯作者：
Xu, Jianming
中科院分区：
文献类型：
--
作者：
Xing, Jiajia;Jia, Xiu;Xu, Jianming
土壤微生物群落在结构和功能上往往对微生物入侵造成的影响没有抵抗力，但目前尚不清楚这些变化是否会随着时间的推移而持续。在这里，我们使用了三株大肠杆菌O157：H7(E.coliO157：H7)，一种用于模拟细菌入侵的物种，来评估来自中国四个土壤的细菌群落对入侵的抵抗力。E。通过分析细菌群落组成和代谢潜力，对土壤原生群落中的大肠杆菌O157：H7菌株进行了120天的跟踪。我们表明，土壤原生群落对入侵没有抵抗力，所有处理的细菌多样性下降和细菌组成变化证明了这一点。本地细菌群落的恢复力(多样性和组成)与入侵者在土壤中的持久性呈负相关(R2=0.487，p<；0.001)。微生物入侵还影响土壤群落的功能(生态位宽度和群落生态位)，恢复能力的程度取决于土壤或本地群落的多样性。总体而言，我们的结果表明，细菌入侵可能会在土壤群落的结构和功能中留下足迹，这表明有必要评估在土壤环境中引入外来物种的遗产。
Soil microbial communities are often not resistant to the impact caused by microbial invasions, both in terms of structure and functionality, but it remains unclear whether these changes persist over time. Here, we used three strains ofEscherichia coliO157:H7 (E. coliO157:H7), a species used for modelling bacterial invasions, to evaluate the resilience of the bacterial communities from four Chinese soils to invasion. The impact ofE. coliO157:H7 strains on soil native communities was tracked for 120 days by analysing bacterial community composition as well as their metabolic potential. We showed that soil native communities were not resistant to invasion, as demonstrated by a decline in bacterial diversity and shifts in bacterial composition in all treatments. The resilience of native bacterial communities (diversity and composition) was inversely correlated with invader's persistence in soils (R-2= 0.487,p< 0.001). Microbial invasions also impacted the functionality of the soil communities (niche breadth and community niche), the degree of resilience being dependent on soil or native community diversity. Collectively, our results indicate that bacteria invasions can potentially leave a footprint in the structure and functionality of soil communities, indicating the need of assessing the legacy of introducing exotic species in soil environments.