AI Article Synopsis
- Marine mammals like dolphins and sea lions have unique and diverse bacterial communities that differ from other mammals and their diets.
- In a study of 337 samples from various body sites, dolphins showed a high number of distinct bacterial phyla, especially in their mouths, while having fewer in their guts.
- Factors such as environment, diet, and evolutionary history influence the composition of these bacterial communities, which can aid in monitoring the health of marine mammals.
Article Abstract
Marine mammals play crucial ecological roles in the oceans, but little is known about their microbiotas. Here we study the bacterial communities in 337 samples from 5 body sites in 48 healthy dolphins and 18 healthy sea lions, as well as those of adjacent seawater and other hosts. The bacterial taxonomic compositions are distinct from those of other mammals, dietary fish and seawater, are highly diverse and vary according to body site and host species. Dolphins harbour 30 bacterial phyla, with 25 of them in the mouth, several abundant but poorly characterized Tenericutes species in gastric fluid and a surprisingly paucity of Bacteroidetes in distal gut. About 70% of near-full length bacterial 16S ribosomal RNA sequences from dolphins are unique. Host habitat, diet and phylogeny all contribute to variation in marine mammal distal gut microbiota composition. Our findings help elucidate the factors structuring marine mammal microbiotas and may enhance monitoring of marine mammal health.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4742810 | PMC |
| http://dx.doi.org/10.1038/ncomms10516 | DOI Listing |
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