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FORSKREF - - Direktoratet for naturforvaltning

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Vedlegg A21 Tetthet av bunndyr med standardavvik. på stasjon 11 og 17 i Vikedalselva vår og høst 1996Stasjonene er avmerket på figur 1St. 11 St. 17 St. 11 St. 1708.05.199 08.05.1996 23.10.199 23.10.199666Gruppe/art N m 2 Std dev N m 2 Std dev N m 2 Std dev N m 2 Std devTurbellariaOtomesostoma auditivum 4 9 0 0 11 19 2 5Crenobia alpina 7 13 0 0 9 8 2 5Nematoda 613 1220 241 240 605 302 196 202Oligocheta 317 147 96 35 707 481 754 232Acari 2339 4163 250 298 3087 1826 1015 696GastropodaLymnaea peregra 0 0 0 0 4 9 6 6BivalviaPisidium sp 0 0 0 0 0 0 4 6EphemeropteraLeptophlebia sp 2 5 0 0 24 22 0 0Leptophlebia vespertina 0 0 0 0 7 11 0 0Baetis rhodani 11 19 78 68 128 100 830 236Baetis sp 0 0 0 0 33 52 0 0PlecopteraBrachyptera risi 0 0 15 17 48 44 206 129Amphinemura borealis 167 143 800 217 467 397 2259 1348Amphinemura sulcicollis 93 70 31 24 167 116 1418 1250Amphinemura sp 20 40 156 171 313 303 893 690Protonemura meyeri 15 31 6 9 4 9 65 44Leuctra fusca 91 73 152 52 718 357 687 497Leuctra hippopus 152 165 17 21 100 59 500 258Leuctra digitata 0 0 11 14 0 0 0 0Leuctra nigra 0 0 0 0 0 0 43 94Nemoura cinerea 0 0 0 0 2 5 7 13Nemoura avicularis 0 0 0 0 0 0 2 5Nemurella picteti 0 0 0 0 0 0 0 0Nemoura sp 0 0 2 5 4 9 0 0Taeniopteryx nebulosa 0 0 0 0 7 18 0 0Siphonoperla burmeisteri 56 48 15 11 69 77 37 15Diura nanseni 2 5 6 9 0 0 4 6Isoperla sp. 0 0 0 0 0 0 0 0Plecoptera ind 0 0 2 5 2 5 2 5TrichopteraRhyacophila nubila 0 0 15 17 15 18 44 23Rhyacophila nubila p. 0 0 0 0 4 9 0 0Tinodes waeneri 0 0 0 0 0 0 2 5Polycentropodidae ind 141 142 4 6 204 151 94 69Polycentropus flavomaculatus 281 180 6 6 465 191 144 59Plectrocnemia conspersa 0 0 0 0 13 23 4 9Neureclipsis bimaculata 11 17 0 0 33 31 0 0Limnephilidae ind. 7 9 2 5 4 9 0 0Hydropsyche sp 0 0 0 0 4 9 0 0Hydropsyche pellucidula 4 6 4 9 28 34 37 9Hydropsyche siltalai 2 5 0 0 2 5 0 0Lepidostoma hirtum 4 9 15 13 11 19 83 63Apatania sp 0 0 6 9 4 9 113 63Oxyethira sp 193 273 11 19 533 703 44 25Trichoptera ind 0 0 0 0 13 32 0 0Chironomidae l. 8642 10392 11319 4317 21240 9381 9206 2347Chironomidae p. 20 24 406 164 0 0 0 0Ceratopogonidae 0 0 9 15 0 0 24 49Simulidae 19 17 33 43 2089 1141 326 163Tipulidae 0 0 13 23 6 9 7 18Diptera 57 47 354 299 202 88 222 164Coleoptera 0 0 426 401 2 5 365 222CrustaceaCalanoidae ind 85 30 6 9 274 179 7 9Cyclops sp 287 280 7 13 235 110 78 72Nauplii 146 358 0 0 0 0 0 0Bosmina sp 302 228 37 67 1705 614 169 167Holopedium gibberum 2 5 0 0 2 5 0 0Polyphemus sp 0 0 0 0 2 5 0 0Chydoridae ind 865 2037 2 5 1228 859 37 41Ostracoda 13 8 2 5 22 34 146 29Sum 14967 18687 14550 5487 34854 13543 20083 4303183

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