Seasonal changes in zooplankton community structure in Lake Küçükçekmece, İstanbul, Turkey

Rotifera ve Cladocera grubu üyeleri tatlı su ortamına ait oldukları halde, Copepoda grubundan Acartia clausi, Ciliate grubundan Tintinnopsis nana, Favella sp. Jorgensen, 1924, Strobilidium spiralis, Polychaeta grubundan Micronereis sp. Linnaeus, 1758 ve Spio sp. Fabricius, 1785, Amphipoda grubundan Gammarus sp. Fabricius, 1775 deniz ortamı canlıları olarak göl zooplanktonunda yer almışlardır. Rotifera grubu her mevsim baskın olmuştur. Sonbahar mevsiminde Bosmina longirostris, Spio sp. Fabricius, 1785, Pleurobranchia pileus, Balanus sp.’nin cypris, nauplius larvası ve bivalvlerin veliger larvası; kış mevsiminde Synchaeta pectinata, Filinia longirostris ve Epiphanes sp. Ehrenberg, 1832; ilkbahar mevsiminde Asplachna priodonta, Strobilidium spiralis; yaz mevsiminde Brachionus plicatilis yüksek sayısal değerlere ulaşmışlardır. Gölde tespit edilen Polyarthra major, Filinia longiseta, Keratella cochlearis ve Branchionus türleri ötrofi kasyonun indikatör türleridir. Denizel türlerden Tintinnopsis nana 1. ve 2. istasyonda ilkbahar mevsiminde, Acartia clausi ise 2. istasyonda yaz mevsiminde en yüksek değerine ulaşmıştır.

Küçükçekmece Gölü zooplankton gruplarının mevsimsel dağılımı

The zooplankton community of Lake Küçükçekmece includes individuals from freshwater groups Rotifera and Cladocera, and also marine species Acartia clausi of the subclass Copepoda; Tintinnopsis nana, Favella sp. Jorgensen, 1924, and Strobilidium spiralis from the group Ciliata; Micronereis sp. Linnaeus, 1758 and Spio sp. Fabricius, 1785 from the class Polychaeta; Pleurobrachia pileus from the phylum Ctenophora; and Gammarus sp. Fabricius, 1775 from the order Amphipoda. Rotifera was the dominant group for each season studied. In autumn, dominant specimens included Bosmina longirostris, Spio sp. Fabricius, 1785, Pleurobrachia pileus, the cypris and nauplius larva of Balanus sp., and veliger larva. In winter, dominant species included Synchaeta pectinata, Filinia longirostris, and Epiphanes sp. Ehrenberg, 1832. In spring, dominate species included Asplanchna priodonta and Strobilidium spiralis. In summer, the dominant species was Brachionus plicatilis. Polyarthra major, Filinia longiseta, Keratella cochlearis, and Brachionus, which were found in the lake, are indicator species of eutrophication. Marine species Tintinnopsis nana peaked during spring at the fi rst and second sampling stations, while Acartia clausi peaked during summer at the second station.

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