Site: Tretjønnet
| Species | Scientific name | 1989 | 1990 |
|---|---|---|---|
| Aeshna sp. | 1 | ||
| Agabus sp. | 1 | ||
| Ankistrodesmus cf. spiralis | 1 | ||
| Brasmegras | Isoëtes sp. | 1 | |
| Closterium sp. | 1 | ||
| Corixidae indet. | 1 | ||
| Cosmarium sp. | 1 | ||
| Crucigenia sp. | 1 | ||
| Pea clam | Pisidium sp. | 1 | |
| Gås | Anatidae sp. | 1 | |
| Lyngbya sp. | 1 | ||
| Mallomonas sp. | 1 | ||
| Monoraphidium cf. contortum | 1 | ||
| Notonecta sp. | 1 | ||
| Pandorina sp. | 1 | ||
| Paratanytarsus sp. | 1 | ||
| Peridinium sp. | 1 | ||
| Piggknopp | Sparganium sp. | 1 | |
| Polypedilum nubeculosum gr. | 1 | ||
| Procladius sp. | 1 | ||
| Psectrocladius sp. | 1 | ||
| Pseudoanabaena sp. | 1 | ||
| Scenedesmus sp. | 1 | ||
| Staurodesmus sp. | 1 | ||
| Tjønnaks | Potamogeton sp. | 1 | |
| Torvmoser | Sphagnum sp. | 1 | |
| Veronika | Veronica sp. | 1 | |
| European perch | Perca fluviatilis | 1 | |
| Alonella nana | 1 | ||
| Ankistrodesmus spiralis | 1 | ||
| Athripsodes aterrimus | 1 | ||
| Athripsodes cinerus | 1 | ||
| Botnegras | Lobelia dortmanna | 1 | |
| Brei dunkjevle | Typha latifolia | 1 | 1 |
| Caenis horaria | 1 | ||
| Caenis luctuosa | 1 | ||
| Ceratium hirundinella | 1 | 1 | |
| Chydorus sphaericus | 1 | ||
| Clinotanypus nervosus | 1 | ||
| Crucigenia tetrapedia | 1 | ||
| Cyrnus insolutus | 1 | ||
| Dinobryon divergens | 1 | ||
| Duskmyrull | Eriophorum angustifolium | 1 | 1 |
| Fuglevikke | Vicia cracca | 1 | |
| Rosebay Willowherb | Epilobium angustifolium | 1 | |
| Glyphotaelius pellucidus | 1 | ||
| Graptodytes pictus | 1 | ||
| Grasstjerneblom | Stellaria graminea | 1 | |
| Grøftesoleie | Ranunculus flammula | 1 | 1 |
| Yellow Water-lily | Nuphar lutea | 1 | |
| Gulldusk | Lysimachia thyrsiflora | 1 | |
| Gulstarr | Carex flava | 1 | |
| Haliplus ruficollis | 1 | ||
| Hoppekreps | Eudiaptomus gracilis | 1 | |
| White Water-lily | Nymphaea alba | 1 | |
| Northern Dock | Rumex longifolius | 1 | |
| Ilybius fuliginosus | 1 | ||
| Cross-leaved Heath | Erica tetralix | 1 | |
| Knappsiv | Juncus conglomeratus | 1 | 1 |
| Creeping Buttercup | Ranunculus repens | 1 | |
| Kvitmyrak | Rhynchospora alba | 1 | |
| Limnephilus flavicornis | 1 | ||
| Lyssiv | Juncus effusus | 1 | |
| Myrhatt | Comarum palustre | 1 | 1 |
| Ophryoxus gracilis | 1 | ||
| Paddesiv | Juncus bufonius | 1 | |
| Polycentropus irroratus | 1 | ||
| Pseudovermicorixa nigrolineata | 1 | ||
| Retrocorixa semistriata | 1 | ||
| Ryllsiv | Juncus articulatus | 1 | |
| Scenedesmus acutus | 1 | ||
| Scenedesmus arcuatus | 1 | ||
| Sennegras | Carex vesicaria | 1 | 1 |
| Sjøsivaks | Schoenoplectus lacustris | 1 | |
| Sphaerocystis setigera | 1 | ||
| Stor bruskigle | Glossiphonia complanata | 1 | |
| Sumpsiv | Juncus bulbosus | 1 | 1 |
| Tabellaria flocculosa | 1 | ||
| Common reed | Phragmites australis | 1 | |
| Tetraedron minimum | 1 | ||
| Tjernaks | Potamogeton natans | 1 | |
| Toøyd flatigle | Helobdella stagnalis | 1 | |
| Vanlig damsnegl | Lymnaea peregra | 1 | 1 |
| Vannskorpion | Nepa cinerea | 1 | |
| Eared Willow | Salix aurita | 1 |
