Small colony dynamics. Brood composition at different developmental stages expressed as percentage of total brood mass (i.e. dynamics of micro-colony development) for small colonies exposed to different levels of environmental stresses. Diet with a dominance of Salix sp. is highly suitable, diet with a dominance of Cistus sp. has medium suitability, and diet with a dominance of Taraxacum sp. has low suitability. Asterisks indicate significant differences in brood composition between micro-colonies fed different pollen diets (pairwise perMANOVAs; *p < 0.05; **p < 0.01; ***p < 0.001). Different letters indicate significant differences in the proportion of brood stages among bioassays (post-hoc tests, p < 0.05).