Site: Tveitavatnet
| Species | Scientific name | 1989 | 1990 | 1991 | 1992 | 1994 |
|---|---|---|---|---|---|---|
| Aeshna sp. | 2 | 1 | ||||
| Agabus sp. | 1 | |||||
| Anabaena sp. | 1 | |||||
| Ankyra sp. | 1 | |||||
| Caenis sp. | 1 | |||||
| Cladopelma laccophila gr. | 1 | |||||
| Coenagrion sp. hastulatum gr. | 1 | |||||
| Coenagrionidae indet. | 1 | |||||
| Corixidae indet. | 1 | 1 | ||||
| Cosmarium sp. | 2 | |||||
| Cyclotella sp. | 2 | 1 | ||||
| Pea clam | Pisidium sp. | 1 | 1 | |||
| Euastrum cf. elegans | 1 | |||||
| Gerridae indet. | 1 | |||||
| Libellulidae indet. | 1 | |||||
| Mallomonas sp. | 2 | 1 | ||||
| Merismopedia sp. | 2 | |||||
| Microcystis sp. | 1 | |||||
| Microtendipes pedellus gr. | 1 | |||||
| Monoraphidium sp. | 1 | 1 | ||||
| Nephrocytium sp. | 1 | |||||
| Oocystis sp. | 1 | 1 | ||||
| Paramerina sp. | 1 | |||||
| Phryganeidae indet. | 1 | |||||
| Procladius sp. | 1 | 1 | ||||
| Psectrocladius psilopterus gr. | 1 | |||||
| Rhodomonas sp. | 3 | |||||
| Scenedesmus cf. ecornis | 1 | |||||
| Subsigara cf. distincta | 1 | |||||
| Tanytarsus sp. | 1 | |||||
| Ablabesmyia longistyla | 1 | |||||
| Ablabesmyia monilis | 1 | |||||
| Aeshna grandis | 1 | |||||
| Agabus sturmii | 1 | |||||
| Agrypnia obsoleta | 1 | |||||
| Agrypnia varia | 1 | |||||
| Bitrichia chodatii | 2 | |||||
| Bukkeblad | Menyanthes trifoliata | 1 | ||||
| Caenis horaria | 2 | 1 | ||||
| Cloeon dipterum | 1 | |||||
| Cloeon simile | 1 | |||||
| Coenagrion pulchellum | 1 | |||||
| Cordulia aenea | 2 | 1 | 1 | |||
| Corixa punctata | 2 | |||||
| Crucigenia tetrapedia | 1 | |||||
| Dinobryon bavaricum | 2 | |||||
| Dinobryon crenulatum | 2 | 1 | ||||
| Dinobryon divergens | 2 | 1 | ||||
| Dinobryon korschikovii | 1 | |||||
| Dinobryon suecicum | 1 | |||||
| Elvesnelle | Equisetum fluviatile | 1 | ||||
| Haliplus confinis | 1 | |||||
| Haliplus ruficollis | 1 | |||||
| Hygrotus inaequalis | 1 | 1 | ||||
| Ilybius fuliginosus | 1 | 1 | ||||
| Ischnura elegans | 1 | 1 | ||||
| Leptophlebia vespertina | 1 | |||||
| Liten vannløper | Gerris lacustris | 1 | ||||
| Lys Andeigle | Theromyzon tessulatum | 1 | ||||
| Polycentropus irroratus | 1 | |||||
| Pyrrhosoma nymphula | 1 | 1 | ||||
| Sialis lutaria | 2 | 1 | 1 | |||
| Sigara dorsalis | 1 | 1 | 1 | |||
| Sjøsivaks | Schoenoplectus lacustris | 1 | ||||
| Somatochlora metallica | 1 | |||||
| Stictotarsus duodecimpustulatus | 1 | 1 | ||||
| Storblærerot | Utricularia vulgaris | 1 | ||||
| Subsigara scotti | 1 | 1 | ||||
| Svart høstlibelle | Sympetrum danae | 1 | 1 | 1 | ||
| Tabellaria fenestrata | 1 | |||||
| Tabellaria flocculosa | 4 | 1 | ||||
| Trepigget stingsild | Gasterosteus aculeatus | 1 | ||||
| Vanlig damsnegl | Lymnaea peregra | 2 | 1 | 1 | ||
| Brown trout | Salmo trutta | 1 | ||||
| juncea sp. | 1 | 1 |
