| Species | Code of each species | Stations Boufekrane River | |||||
| Upstream (stations 1 - 4) | Downstream (stations 5 - 6) | ||||||
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| E | BF1 | BF2 | BF3 | BF4 | BF5 | BF6 |
| Polycelis felina | E1 | 16 | 12 |
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| Polycelis nigra | E2 | 4 | 4 |
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| Polycelis tenuis | E3 | 3 | 1 | 3 |
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| Phagocata sp. | E4 | 4 |
| 2 |
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| Dugesia lugubris | E5 | 3 | 1 |
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| Dugesia polychroa | E6 | 3 |
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| Dugesia gonocephala | E7 | 1 |
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| Dugesia tigrina | E8 | 2 |
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| Dendrocoelum lacteum | E9 | 3 |
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| Potamodrlus sp. | E10 | 2 |
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| Gordiace sp. | E11 | 0 |
| 2 |
| 4 |
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| Glassiphonia complanata | E12 | 4 | 14 | 2 | 5 |
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| Hemiclepsis sp. | E13 | 1 | 7 |
| 2 |
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| Helobdella sp. | E14 | 1 | 11 |
| 1 |
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| Piscicola sp. | E15 | 2 |
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| Hirudo sanguisuga | E16 | 30 | 12 | 5 | 7 | 12 |
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| Hirudo medicinalis | E17 | 3 | 17 |
| 6 |
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| Nais christane | E18 |
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| 18 |
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| Nais pardalis | E19 |
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| 23 |
|
| Stylaria sp. | E20 |
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|
| 32 | 3 |
| Lumbriculus variegatus | E21 |
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| 10 | 453 |
| Enchytraeus sp. | E22 |
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| 13 | 65 |
| Eiseniella tetraedra | E23 |
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| 34 | 34 |
| Branchiura sowerbyid | E24 |
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|
| 94 | 54 |
| Aulodrilus limnobus | E25 |
|
| 11 |
| 65 | 76 |
| Tubifex tubifex | E26 |
|
| 2 |
| 35 | 326 |
| Tubifex ignotus | E27 |
|
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|
| 67 | 678 |
| Valvata piscinalis | E28 | 102 | 34 | 12 | 13 |
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| Valvata minuta | E29 | 15 | 8 |
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| Valvata fagoti | E30 | 10 | 2 |
| 2 |
| 4 |
| Valvata globulina | E31 | 22 | 34 | 13 | 34 |
| 3 |
| Valvata moquini | E32 | 12 | 1 | 6 | 7 |
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| Valvata cristata | E33 | 18 | 3 | 13 | 2 |
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| Valvata exilis | E34 | 2 | 1 | 1 |
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| Viviparus vivipara | E35 | 11 | 8 | 2 | 12 |
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| Viviparus fasciata | E36 | 3 | 9 |
| 1 |
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