Spatial organization of the gastrointestinal microbiota in urban Canada geese

Scientific Reports
By: , and 

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Abstract

Recent reviews identified the reliance on fecal or cloacal samples as a significant limitation hindering our understanding of the avian gastrointestinal (gut) microbiota and its function. We investigated the microbiota of the esophagus, duodenum, cecum, and colon of a wild urban population of Canada goose (Branta canadensis). From a population sample of 30 individuals, we sequenced the V4 region of the 16S SSU rRNA on an Illumina MiSeq and obtained 8,628,751 sequences with a median of 76,529 per sample. These sequences were assigned to 420 bacterial OTUs and a single archaeon. Firmicutes, Proteobacteria, and Bacteroidetes accounted for 90% of all sequences. Microbiotas from the four gut regions differed significantly in their richness, composition, and variability among individuals. Microbial communities of the esophagus were the most distinctive whereas those of the colon were the least distinctive, reflecting the physical downstream mixing of regional microbiotas. The downstream mixing of regional microbiotas was also responsible for the majority of observed co-occurrence patterns among microbial families. Our results indicate that fecal and cloacal samples inadequately represent the complex patterns of richness, composition, and variability of the gut microbiota and obscure patterns of co-occurrence of microbial lineages.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Spatial organization of the gastrointestinal microbiota in urban Canada geese
Series title Scientific Reports
DOI 10.1038/s41598-018-21892-y
Volume 8
Year Published 2018
Language English
Publisher Nature
Contributing office(s) Patuxent Wildlife Research Center
Description Article number 3713; 10 p.
First page 1
Last page 10