Repeated sampling of individuals reveals impact of tropical and temperate habitats on microbiota of a migratory bird
Repeated sampling of individuals reveals impact of tropical and temperate habitats on microbiota of a migratory bird
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DOI：
10.1111/mec.16170
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发表时间：
2021-09-28
影响因子：
4.9
通讯作者：
Marra, Peter P.
中科院分区：
文献类型：
--
作者：
Skeen, Heather R.;Cooper, Nathan W.;Marra, Peter P.
在整个年度周期中，经历饮食和栖息地重大变化的迁徙动物可能会在宿主相关微生物多样性方面发生相应的变化。使用自动遥测和无线电标签重新捕获鸟类，我们研究了肠道微生物群结构在同一个人口，往往是同一个人的克特兰的莺（Setophaga kirtlandii）最初采样的越冬理由在巴哈马群岛，随后重新采样在他们的繁殖区在密歇根州，美国。3月和4月进行了初步采样，5月、6月和7月初进行了重新采样。鸣禽微生物群中最丰富的门和类的组成与其他候鸟相似。然而，我们检测到许多细菌类群的丰度和多样性的显着变化，包括微生物丰富度的减少和微生物群落的显着差异时，比较在巴哈马群岛首次捕获的鸟类的微生物群在密歇根州重新捕获的鸟类。这在个人和群体层面上都可以观察到。此外，我们发现22个细菌属在特定的采样期内表现出更高的丰度，可能与饮食和环境变化有关。最后，我们描述了一个小的，物种特异性的共享微生物概况，跨越多个时间段和迁移周期内的环境。我们的研究强调，随着时间的推移，鸟类肠道微生物群是动态的，最受与迁徙相关的环境变化的影响。这些结果支持需要对候鸟微生物群进行完整的年度周期监测，以提高对季节性宿主运动生态和对经常性生理压力的反应的理解。
Migratory animals experiencing substantial change in diet and habitat across the annual cycle may have corresponding shifts in host-associated microbial diversity. Using automated telemetry and radio tags to recapture birds, we examined gut microbiota structure in the same population and often same individual of Kirtland's Warblers (Setophaga kirtlandii) initially sampled on their wintering grounds in The Bahamas and subsequently resampled within their breeding territories in Michigan, USA. Initial sampling occurred in March and April and resampling occurred in May, June and early July. The composition of the most abundant phyla and classes of the warblers' microbiota is similar to that of other migratory birds. However, we detected notable variation in abundance and diversity of numerous bacterial taxa, including a decrease in microbial richness and significant differences in microbial communities when comparing the microbiota of birds first captured in The Bahamas to that of birds recaptured in Michigan. This is observed at the individual and population level. Furthermore, we found that 22 bacterial genera exhibit heightened abundance within specific sampling periods and are probably associated with diet and environmental change. Finally, we described a small, species-specific shared microbial profile that spans multiple time periods and environments within the migratory cycle. Our research highlights that the avian gut microbiota is dynamic over time, most significantly impacted by changing environments associated with migration. These results support the need for full annual cycle monitoring of migratory bird microbiota to improve understanding of seasonal host movement ecologies and response to recurrent physiological stressors.