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. 2020 Oct 6;11:579290. doi: 10.3389/fmicb.2020.579290

Figure 2.

Figure 2

Abundance, diversity, and abundance-occupancy relationships of protist community. (A) Cell abundance, trophic structure, and size structure of nano-sized protist communities across time and space. Different letters denote significant differences among groups. (B) Boxplots displayed the temporal and spatial distribution of alpha-diversity index of protist communities. Non-parametric test (Kruskal-Wallis ANOVA) was used to compare the differences among six groups and all values of p were lower than 0.001. The hollow diamonds represent average values of individual index in each group. (C) Species accumulation curves (SAC) of protist taxa [i. all OTUs; ii. conditionally rare and abundant taxa (CRAT); iii. conditionally rare taxa (CRT); and iv. rare taxa (RT)]. Boxplots in SAC showed the range of OTU richness for each number of samples sequenced. (D) Abundance-occupancy relationships between OTU richness and number of sites occupied. Spearman’s rank correlations were used to evaluate the relationships between abundance of OTUs (log-transformed) from three different microbial subcommunities and the number of sites occupied (n is the number of OTUs).