Fig. 4.

Meta-analyses of pollinator response to nectar properties, either for plant-derived components such as nectar secondary metabolites and amino acids or microbe presence, separated into yeasts and bacteria. The number of effect sizes extracted from the studies available (n in column) for each category is included in the table above the figure. Raw data (as well as the individual effect size estimates included for each summary point here) and information on criteria for data extraction can be found in the online supplementary data.