Table 2.

Diversity of birds in different river section groups during the four seasons. I: river section group I; II: river section group II; III: river section group III; IV: river section group IV.

Diversity	River Section Group	Summer	Autumn	Winter	Spring
Species richness index	I	45.00 ± 4.32	58.00 ± 2.00	53.20 ± 8.93	39.50 ± 6.50
	II	33.33 ± 0.94	57.50 ± 5.50	40.20 ± 8.91	31.50 ± 2.50
	III	36.33 ± 2.62	50.50 ± 1.50	44.20 ± 11.48	39.00 ± 1.00
	IV	47.33 ± 3.86	51.00 ± 1.00	62.20 ± 5.11	46.50 ± 2.50
Shannon–Wiener index	I	3.02 ± 0.07	3.52 ± 0.03	3.11 ± 0.36	3.25 ± 0.08
	II	2.87 ± 0.06	3.48 ± 0.07	3.03 ± 0.23	3.11 ± 0.01
	III	3.01 ± 0.07	3.41 ± 0.00	2.56 ± 0.47	3.15 ± 0.01
	IV	2.97 ± 0.04	3.45 ± 0.01	2.62 ± 0.69	3.27 ± 0.03
Pielou index	I	0.42 ± 0.01	0.54 ± 0.01	0.44 ± 0.06	0.49 ± 0.01
	II	0.41 ± 0.01	0.55 ± 0.01	0.45 ± 0.04	0.46 ± 0.00
	III	0.42 ± 0.02	0.51 ± 0.00	0.34 ± 0.07	0.45 ± 0.00
	IV	0.40 ± 0.00	0.51 ± 0.00	0.34 ± 0.10	0.46 ± 0.00