Diversity-function relationships are a frontier of ecology research. Here, we look at the function of bacterial communities to suppress chytrid fungus, and they do this better when at higher diversity.
Piovia-Scott J, Rejmanek D, Woodhams DC, Worth SJ, Kenny H, McKenzie V, Lawler SP, Foley JE. (2017) Greater species richness of bacterial skin symbionts better suppresses the amphibian fungal pathogen Batrachochytrium dendrobatidis. Microbial Ecology, 74(1):217-226.
https://link.springer.com/article/10.1007%2Fs00248-016-0916-4