Zooplankton fauna of Lake Iznik (Bursa, Turkey)

In the present study the zooplankton fauna of Lake Iznik (Bursa) was investigated during January-December 2006. A total of 54 taxa-35 taxa from rotifers, 14 taxa from cladocerans, and 5 taxa from copepods-were identified in Lake Iznik. Brachionus calyciflorus, B. angularis, Notholca squamula, N. acuminata, Euchlanis dilatata, E. deflexa, Platyias quadricornis, Trichocerca similis, T cylindrica, T chattoni, T lophoessa, T bicristata, Asplanchna girodi, Conochiulus dossuarius, Synchaeta pectinaia, Lecane luna, L. bulla, L. stenroosi, L. clostrocerca, L. lunaris, Lepadella patella, Dicranophorus forcipatus, Mytilina mucronata, Lophocharis salpina, Trichotria tetractis, T pocillum, Testudinella patina, Hexarthra fennica, and Collotheca sp. from the rotifera species; Diaphanosoma lacustris, D. orghidani, Daphnia cucullata, Ceriodaphnia quadrangula, Macrothrix laticornis, Alona rectangula, Leydigia leydigi, Graptoleberis testudinaria, Cyhdorus sphaericus, Pleuroxus aduncus, P trigonellus, Alonella excisa, and Phrixura rostrata from the cladocera species; and Eucyclops macruroides, Paracyclops fimbriatus, Cyclops vicinus, and Thermocyclops crassus from the copepoda species are new records for Lake Iznik. According to the Q(Brachionus/Trichocerca) index (Q = 0.8) used for the determination of trophic level, the lake is oligotrophic.