Table 1.

Analysis of similarity between the microbial communities in the different fractions.

P-value/	Free-living	P-100	P-60	P-40	P-10	P-<10
R-value
Free-living		0.0015	0.0015	0.0015	0.0015	0.0015
P-100	0.5902∗∗		0.213	0.003	0.0015	0.0015
P-60	0.6233∗∗	0.15		0.1995	0.027	0.0074
P-40	0.5755∗∗	0.402∗∗	0.1824		1	0.2325
P-10	0.5597∗∗	0.3735∗∗	0.2158∗	0.073		1
P-<10	0.6864∗∗	0.4287∗∗	0.3125∗∗	0.1694	-0.03051

This analysis statistically test whether significant differences exists between two or more groups of samples according to the distance obtained from the Bray–Curtis dissimilarity matrix. R-value denotes the degree of differences between the groups with R-values closer to 1 denoting a highly different community composition. The lower quadrant represent the R-values for each group pair and the upper quadrant represents the Bonferroni corrected P-value for each pair. ^∗represents a significance at P < 0.05 and ^∗∗ significance at P < 0.01.