FIGURE 4.

The impact of preservation methods on the top 60 OTUs. Heatmaps shown was the differences in relative abundance among groups of the top 60 OTUs, which accounted for about 65% of coverage, as well as their taxa information including genus, family, and phylum. The red and green entries indicate the number of OTU that were significantly more or less abundant under different storage conditions relative to fresh samples, respectively. n = 5 per group. *p < 0.05 and FDR < 0.05, compared with fresh group.