eLife Assessment
This study provides an important first look at the influence of vertical transmission in the establishment of the amphibian microbiome, with a specific focus on the potential role of parental care. Through a combination of cross-fostering experimental work, comparative analysis across species that show variable levels of care, and developmental time series, the authors provide convincing evidence that vertical transmission through care is possible, but incomplete evidence that it plays a significant role in shaping frog skin microbiomes in nature or across time. This work will be of interest to researchers studying the evolution of parental care and microbiomes in vertebrates.