An observational field study of the cloacal microbiota in adult laying hens with and without access to an outdoor range

摘要

Comparison of observed species richness (a) and Pielou’s evenness (b) between indoor- (blue) and outdoor-layers (red). Each box contains samples from a single poultry house. Each dot represents an individual chicken. Wilcoxon-Rank-Sum test were performed between indoor- and outdoor-layers. A lower value for Pielou’s evenness indicates less evenness in the microbial community of a sample