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