Fig. 3From: Gut microbiota of homing pigeons shows summer–winter variation under constant diet indicating a substantial effect of temperatureRelationships between alpha-diversity indices and season and sex, and metabolism and immune indices. The boxplots present seasonal and sexual variation for a richness, b Shannon diversity, and c Faith’s phylogenetic diversity. Richness and Faith’s phylogenetic diversity both decreased with increasing body mass d, e, while Faith’s phylogenetic diversity also increased with titres of antibodies against KLH f. Statistics are presented in Table 2Back to article page