Microbial community assembly in wild populations of the fruit fly Drosophila melanogaster
Microbial community assembly in wild populations of the fruit fly Drosophila melanogaster
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DOI：
10.1038/s41396-017-0020-x
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发表时间：
2018-04-01
期刊：
影响因子：
11
通讯作者：
Douglas, Angela E.
中科院分区：
文献类型：
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作者：
Adair, Karen L.;Wilson, Marita;Douglas, Angela E.
动物经常受到微生物的侵袭。尽管许多研究记录了与动物相关的微生物分类群，但对微生物群落中动物间差异的模式和生态决定因素知之甚少。这项研究量化了与果蝇自然种群相关的细菌群落。在五个收集中，每个苍蝇都有16-78个OTU，主要是醋酸杆菌科、乳杆菌科和肠杆菌科。细菌间的显著共生和共生网络均以正相关的OTU为主，具有重要网络位置的OTU一般具有中等丰度和流行度。中性模型很好地预测了大多数OTUS的流行，表明生态漂移和被动扩散对微生物群组成有重要影响。然而，一些醋酸菌科和乳杆菌科存在于比预期更多的苍蝇中，这表明苍蝇之间的传播优势。从扩散的角度来看，这些分类群可能很好地适应了果蝇的栖息地，因为这是联合对微生物伙伴的主要好处。综上所述，这些模式表明随机过程和确定性过程都有助于果蝇细菌群落的聚集，这些过程与寄主栖息地的差异持续能力和寄主之间的传播有关。
Animals are routinely colonized by microorganisms. Despite many studies documenting the microbial taxa associated with animals, the pattern and ecological determinants of among-animal variation in microbial communities are poorly understood. This study quantified the bacterial communities associated with natural populations of Drosophila melanogaster. Across five collections, each fly bore 16-78 OTUs, predominantly of the Acetobacteraceae, Lactobacillaceae, and Enterobacteriaceae. Positive relationships, mostly among related OTUs, dominated both the significant co-occurrences and co-association networks among bacteria, and OTUs with important network positions were generally of intermediate abundance and prevalence. The prevalence of most OTUs was well predicted by a neutral model suggesting that ecological drift and passive dispersal contribute significantly to microbiome composition. However, some Acetobacteraceae and Lactobacillaceae were present in more flies than predicted, indicative of superior among-fly dispersal. These taxa may be well-adapted to the Drosophila habitat from the perspective of dispersal as the principal benefit of the association to the microbial partners. Taken together, these patterns indicate that both stochastic processes and deterministic processes relating to the differential capacity for persistence in the host habitat and transmission between hosts contribute to bacterial community assembly in Drosophila melanogaster.