Site: Opsangervatnet
| Species | Scientific name | 1989 | 1990 | 1992 | 1993 | 1994 | 1995 |
|---|---|---|---|---|---|---|---|
| Aphanothece cf. clathrata | 1 | ||||||
| Athripsodes sp. | 1 | ||||||
| Brasmegras | Isoëtes sp. | 1 | 1 | ||||
| Calanoida indet. | 1 | ||||||
| Corixidae indet. | 1 | ||||||
| Corynoneura sp. | 1 | ||||||
| Cyclops sp. | 1 | 1 | |||||
| Endochironomus dispar gr. | 1 | ||||||
| Pea clam | Pisidium sp. | 1 | 1 | ||||
| Gerridae indet. | 1 | ||||||
| Limnephilus sp. | 1 | ||||||
| Mallomonas sp. | 1 | ||||||
| Melosira sp. | 1 | ||||||
| Merismopedia sp. | 2 | ||||||
| Micrasema sp. | 1 | ||||||
| Microcystis spp. | 1 | ||||||
| Måker | Laridae sp. | 1 | |||||
| Nøkkerose | Nymphaeaceae indet. | 1 | 1 | ||||
| Oocystis sp. | 2 | ||||||
| Rhodomonas sp. | 2 | ||||||
| Stictochironomus sp. | 1 | ||||||
| Tjønnaks | Potamogeton sp. | 1 | 1 | ||||
| Ubestemt meitemark | Lumbricidae indet. | 1 | |||||
| Agabus bipustulatus | 1 | ||||||
| Agrypnia varia | 1 | ||||||
| Andemat | Lemna minor | 1 | |||||
| Bosmina longispina | 1 | 1 | 1 | ||||
| Botnegras | Lobelia dortmanna | 1 | 1 | ||||
| Cyrnus trimaculatus | 1 | ||||||
| Dinobryon crenulatum | 1 | ||||||
| Enallagma cyathigerum | 1 | 1 | 1 | ||||
| Flotgras | Sparganium angustifolium | 1 | |||||
| Froskebitt | Hydrocharis morsus-ranae | 1 | 1 | ||||
| Frynsestarr | Carex paupercula | 1 | |||||
| Gelékreps | Holopedium gibberum | 1 | |||||
| Halesus radiatus | 1 | ||||||
| Hesterumpe | Hippuris vulgaris | 1 | 1 | ||||
| Heterocope saliens | 1 | ||||||
| Hoggorm | Vipera berus | 1 | |||||
| White Water-lily | Nymphaea alba | 1 | 1 | ||||
| Hvitmaure | Galium boreale | 1 | |||||
| Hydroporus obscurus | 1 | 1 | |||||
| Hydroporus palustris | 1 | 1 | |||||
| Hygrotus inaequalis | 1 | ||||||
| Hygrotus quinquelineatus | 1 | 1 | |||||
| Hønsegras | Persicaria maculosa | 1 | 1 | ||||
| Ilybius fuliginosus | 1 | ||||||
| Kellicottia longispina | 1 | 1 | |||||
| Cross-leaved Heath | Erica tetralix | 1 | 1 | ||||
| Kornstarr | Carex panicea | 1 | |||||
| Leptophlebia vespertina | 1 | 1 | |||||
| Limnephilus lunatus | 1 | 1 | 1 | ||||
| Limnephilus sparsus | 1 | ||||||
| White Wagtail | Motacilla alba | 1 | |||||
| Linsekreps | Eurycercus lamellatus | 1 | |||||
| Liten vannløper | Gerris lacustris | 1 | 1 | ||||
| Lumbriculus variegatus | 1 | 1 | |||||
| Platambus maculatus | 1 | ||||||
| Plectrocnemia conspersa | 1 | ||||||
| Polycentropus flavomaculatus | 1 | ||||||
| Psectrotanypus varius | 1 | ||||||
| Pyrrhosoma nymphula | 1 | ||||||
| Rhyacophila nubila | 1 | ||||||
| Rusttjernaks | Potamogeton alpinus | 1 | 1 | ||||
| Arctic char | Salvelinus alpinus | 1 | |||||
| Sialis lutaria | 1 | 1 | |||||
| Sigara dorsalis | 1 | 1 | 1 | 1 | 1 | 1 | |
| Skogstjerne | Trientalis europaea | 1 | 1 | ||||
| Dwarf Cornel | Chamaepericlymenum suecicum | 1 | 1 | ||||
| Småblærerot | Utricularia minor | 1 | |||||
| Least Water-lily | Nuphar pumila | 1 | 1 | ||||
| Stictotarsus duodecimpustulatus | 1 | ||||||
| Stivt brasmegras | Isoëtes lacustris | 1 | |||||
| Mallard | Anas platyrhynchos | 1 | |||||
| Subsigara scotti | 1 | 1 | |||||
| Tabellaria fenestrata | 2 | ||||||
| Tabellaria flocculosa | 1 | ||||||
| Common reed | Phragmites australis | 1 | |||||
| Toøyd flatigle | Helobdella stagnalis | 1 | |||||
| Trepigget stingsild | Gasterosteus aculeatus | 1 | 2 | ||||
| Tusenblad | Myriophyllum alterniflorum | 1 | |||||
| Valurt | Symphytum officinale | 1 | |||||
| Vasspest | Elodea canadensis | 1 | 1 | ||||
| Brown trout | Salmo trutta | 2 | 1 | ||||
| European eel | Anguilla anguilla | 1 | 1 | ||||
| distincta | 1 | 1 | 1 | 1 | |||
| fossarum | 1 | ||||||
| Stingsildfamilien | Gasterosteidae indet. | 1 |
