Table 3. Comparison of community diversity indices.

Community diversity Indices	Mean value fot V2-V3 region	Mean value fot V3-V4 region	P_value from Wilkinson-Mann-Whitney test
Values in bold italics are significantly different.
Shannon index	2.79	2.72	0.62 > 0.05
Simpson index	0.79	0.82	0.76 > 0.05
Chao1 index	124	91	0.0006 < 0.05
ACE index	123	89	0.0002 < 0.05