MOGAN GÖLÜ ZOOPLANKTONUNUN MEVSİMSEL DEĞİŞİMİ

Abstract

<div><!--block-->This study investigated the seasonal and monthly changes in the zoo-plankton community in Lake Mogan during May 2010 to April 2011. Zooplankton samples were collected every month at five selected stations in the lake with three replicates, and the water temperature, dissolved oxygen, pH, Secchi disk depth, electrical conductivity, and depth were measured at the stations. Since the lake is frozen in Febru-ary, the samples were not collected in in this month. In this study, 25 species from Rotifera, 7 species from Cladocera, and 1 spe-cies from Copepoda were identified. Zooplankton composition consisted of 72.12% of species from Rotifera, 16.81% from Copepoda, and 11.07% from Cladocera. Dicranophorus epicharis (32.14%), Keratella quadrata (16.96%), and Anuraeopsis fissa (9.77%) from Rotifera and Chydorus sphaericus (7.25%) and Daphnia longispina (1.20%) from Cladocera were the dominant species, while the only species of Copepoda was represented by Arctodiaptomus acutilobatus. The average abundance of zooplanktonic species was highest in summer, spring, and winter, respectively. The high-est average abundance values between 35.39 ±9.20×106 number/m3 and 15.82 ±2.90×106 number/m3 in summer and the lowest average abundance values between 0.98 ±0.36×106 number/m3 and 37 ±0.40×106 numbers/m3 in winter were found. This study presented the effects of recreation studies of Mogan Lake on the quantitative and qualitative changes of zooplankton communities according to stations and seasons.</div>