期刊
MOLECULAR ECOLOGY
卷 28, 期 2, 页码 484-502出版社
WILEY
DOI: 10.1111/mec.14860
关键词
Cetacea; contamination; metagenomics; microbiota; Orcinus orca
资金
- Lindblad Expeditions/National Geographic Conservation Fund
- European Research Council [ERCStG-336536]
- Danish National Research Foundation [DNRF94]
- Antarctic Science Bursary
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie [663830]
- British Ecological Society [SR17\ 1227]
- FORMAS [2016-00835]
- Danish Council for Independent Research-DFF [5051-00033]
- Lundbeckfonden [R250-2017-1351]
- Welsh Government through the Ser Cymru National Research Network for Low Carbon, Energy and Environment
- Higher Education Funding Council for Wales through the Ser Cymru National Research Network for Low Carbon, Energy and Environment
- Formas [2016-00835] Funding Source: Formas
Recent exploration into the interactions and relationship between hosts and their microbiota has revealed a connection between many aspects of the host's biology, health and associated micro-organisms. Whereas amplicon sequencing has traditionally been used to characterize the microbiome, the increasing number of published population genomics data sets offers an underexploited opportunity to study microbial profiles from the host shotgun sequencing data. Here, we use sequence data originally generated from killer whale Orcinus orca skin biopsies for population genomics, to characterize the skin microbiome and investigate how host social and geographical factors influence the microbial community composition. Having identified 845 microbial taxa from 2.4 million reads that did not map to the killer whale reference genome, we found that both ecotypic and geographical factors influence community composition of killer whale skin microbiomes. Furthermore, we uncovered key taxa that drive the microbiome community composition and showed that they are embedded in unique networks, one of which is tentatively linked to diatom presence and poor skin condition. Community composition differed between Antarctic killer whales with and without diatom coverage, suggesting that the previously reported episodic migrations of Antarctic killer whales to warmer waters associated with skin turnover may control the effects of potentially pathogenic bacteria such as Tenacibaculum dicentrarchi. Our work demonstrates the feasibility of microbiome studies from host shotgun sequencing data and highlights the importance of metagenomics in understanding the relationship between host and microbial ecology.
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