Table 1 Taxa and combined subclasses/orders considered to be sufficiently abundant to assess the effects of the test item on at least two sampling dates (average control abundance > 5)
Taxa | Order | Sampling days with mean in control > 5 | Mean abundance based on sampling day −2 | MDD class (%) estimated based on sampling day −2a, b | Categorised as species at risk against pesticides according to [28] | |
|---|---|---|---|---|---|---|
Arthropoda | ||||||
Asellus aquaticus | Isopoda | All sampling days | 70 | IV (28) | No SPEAR | Multivoltine |
Chironomidae Gen. sp. | Diptera | − 21, − 2, 6 | 9 | IV (48) | No SPEAR | Multivoltine |
Gammarus sp. | Amphipoda | All sampling days | 69 | IV (36) | No SPEAR | Uni/bivoltine |
Ephemera danica | Ephemeroptera | 36, 43, 49, 57 | 0 | –c | No SPEAR | Semivoltine |
Ephemerella ignita | Ephemeroptera | − 21, − 2 | 9 | III (67) | No SPEAR | Univoltine |
Limnephilidae Gen. sp. | Trichoptera | − 21, − 2, 6, 13, 20 | 12 | III (55) | SPEAR | Univoltine |
Polycentropus flavomaculatus | Trichoptera | 27, 36, 43, 49 | 0.2 | 0 (202) | SPEAR | Univoltine |
Non-arthropoda | ||||||
Dugesia sp. | Tricladida | 36, 43, 49, 57 | 4 | IV (48) | No SPEAR | Univoltine |
Eiseniella tetraedra | Crassiclitellata | 20, 43, 49 | 0.2 | 0 (209) | No SPEAR | Multivoltine |
Erpobdella octoculata | Arhynchobdellida | 43, 49, 57 | 1 | 0 (108) | No SPEAR | Univoltine |
Helobdella stagnalis | Hirudinida | − 2, 6, 13, 20, 27, 36, 43, 49, 57 | 21 | IV (43) | No SPEAR | Multivoltine |
Combined to higher subclass/order | ||||||
Diptera | − 21, − 2, 6 | 10 | IV (45) | Not classified | Multivoltine | |
Ephemeroptera | − 21, − 2, 6, 13, 36, 43, 49, 57 | 16 | IV (47) | SPEAR | Uni/bivoltine | |
Trichoptera | − 21, − 2, 6, 13, 20, 27, 36, 43, 49 | 12 | IV (49) | SPEAR | Univoltine | |
Oligochaeta | 6, 13, 20, 27 | 4 | II (71) | Not classified | ||
Hirudinea | All sampling days | 25 | IV (46) | No SPEAR | ||