Functional Microbiomes, Volume 67 in the Advances in Ecological Research series, highlights new advances in the field, with this new release highlighting timely content written by an international board of authors. Sections cover the Linking microbial body size to community co-occurrences and stability at multiple geographical scales in agricultural soils, The functional microbiome of grapevine throughout plant evolutionary history and lifetime, Compendium of analytical methods for sampling, characterisation and quantification of bioaerosols, The microbial solution to oil sand pollution: understanding the microbiomes, metabolic pathways and mechanisms involved in naphthenic acid (NA) biodegradation, The Gut Microbiome in Health and Disease: Inflammatory Bowel Diseases, and The need to understand how multiple chemical stressors impact freshwater aquatic microbiomes