Benthic Macroinvertebrates along the Haraz Downstream in Southern Caspian Sea Basin: In Gradient of the Physicochemical Parameters

Table 2

Taxonomic composition and mean values ± standard Deviation of abundance (individual/m²) of the benthic macroinvertebrates.

Order	Family	Genus	Site 1	Site 2	Site 3	Total
Amphipoda	Gammaridae	Gammarus	7.00 ± 7.09^a	0.00 ± 0.00^b	6.55 ± 0.87^a	4.52 ± 5.11
Coleoptera	Elmidae	Narpus	14.60 ± 11.43^a	0.00 ± 0.00^b	14.18 ± 7.61^a	9.59 ± 10.24
	Dytiscidae	Deronectes	8.89 ± 1.93^a	12.47 ± 9.53^a	9.18 ± 6.59^a	10.18 ± 6.65
Diptera	Chironomidae	Unknown	39.29 ± 10.21^a	28.49 ± 6.90^a	42.53 ± 9.18^a	36.77 ± 10.42
	Simuliidae	Unknown	13.52 ± 13.09^a	20.07 ± 19.38^a	1.52 ± 1.65^a	11.70 ± 15.06
	Tabanidae	Unknown	6.67 ± 6.80^a	1.47 ± 1.66^a	2.00 ± 4.47^a	3.38 ± 5.14
	Tipulidae	Dicranota	9.50 ± 10.16^a	25.00 ± 25.34^ab	36.85 ± 32.43^b	23.78 ± 25.90
		Tipula	2.00 ± 2.83^a	10.01 ± 3.53^b	8.80 ± 5.98^b	6.94 ± 5.47
Ephemeroptera	Baetidae	Unknown	13.52 ± 13.09^a	13.52 ± 13.09^a	3.70 ± 3.68^b	10.25 ± 11.37
	Caenidae	Caenis	1.47 ± 1.66^a	1.47 ± 1.66^a	1.47 ± 1.66^a	1.47 ± 1.57
	Heptageniidae	Ecdyonurus	19.18 ± 14.16^a	14.01 ± 8.99^ab	4.67 ± 4.85^b	12.62 ± 11.37
		Heptagenia	23.51 ± 18.46^a	1.47 ± 1.66^b	2.80 ± 2.74^b	9.26 ± 14.57
Hemiptera	Gerridae	Unknown	4.33 ± 4.68^a	9.18 ± 4.34^a	2.00 ± 4.47^a	5.17 ± 5.25
Odonata	Gomphidae	Unknown	15.47 ± 13.10^a	0.00 ± 0.00^a	3.33 ± 3.59^a	6.27 ± 10.09
Oligochaeta	Naididae/Tubificidae	Unknown	4.33 ± 6.16^a	8.67 ± 8.69^ab	13.35 ± 0.91^b	8.78 ± 6.96
Turbellaria	Planariidae	Phagocata	11.00 ± 11.05^a	16.67 ± 16.72^a	15.47 ± 14.82^a	14.38 ± 13.88
Plecoptera	Leuctridae	Unknown	13.52 ± 13.09^a	6.98 ± 6.80^ab	1.52 ± 1.65^b	7.34 ± 9.56
Prosobranchiata	Valvatidae	Valvata	7.00 ± 7.28^a	4.80 ± 2.01^a	8.68 ± 4.16^a	6.83 ± 4.99
	Viviparidae	Unknown	4.51 ± 2.17^a	6.68 ± 6.78^a	7.47 ± 4.50^a	6.22 ± 4.79
Tricoptera	Hydropsychidae	Unknown	68.13 ± 32.39^a	24.89 ± 15.69^ab	20.97 ± 8.83^b	37.99 ± 29.86
Total

Letter case (superscript): significant variation among sites.