a decreasing trendP < 0.05
The fungal Shannon’s index of the giant panda cubs also varied around 1.5 years of age, and a decreasing trend indicated reduced heterogeneity in the fungal community ( P < 0.05 on Welch’s t- test; Supplementary Figure S4 ), which was exactly opposite the variation detected with S obs and Simpson’s index ( Supplementary Figure S3 ).