Sibel Yiğit

Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Six Rotifer species new for the Turkish fauna

Abstract The distribution of Rotifers in 18 dam lakes and natural lakes of Inner Anatolia, the Western Black Sea Region, the Mediterranean Region and Eastern Anatolia was studied between 1999 and 2004. Ninety rotifer species were found, of which six (Brachionus forficula, Dicranophorus epicharis, Epiphanes macrourus, Lecane rhytida, Lecane obtusa, Testudinella parva) are new to the Turkish fauna.

Rotifers in Turkish inland waters

Abstract From a survey of 36 freshwater sites in Turkey, 12 species of Rotifera were recorded as new to Turkey: Aspelta labri, Dicranophorus robustus, Encentrum uncinatum, E. wiszniewskii, Eothinia lamellata, Itura aurita, Lecane arcula, L. hornemanni, L. inopitana, Lindia torulosa, Proales theodora, and Wulfertia kivuensis. These include four genera found in Turkey for the first time (Aspelta, Eothinia, Itura and Wulfertia).

A short list of Rotifers from Turkey

Abstract The distribution of Rotifers in 19 dams, lakes and water reservoirs of Central Anatolia, the Western Black Sea Region and the Mediterranean Region of Turkey was studied between 1992 and 1999. 71 Rotifer species were found, of which five, Lecane hastata, L. rugosa, L. scutata, Proales decipiens, and Resticula gelida, are new to the Turkish fauna.

The Zooplankton Community of Lake Mogan, Turkey

ABSTRACT We surveyed the zooplankton community of Lake Mogan, which has been undergoing gradual eutrophication in recent decades. The zooplankton was dominated by Rotifera (91.1%), followed by Copepoda (7.7%) and Cladocera (1.2%). The dominant species were Filinia longiseta, Brachionus angularis, Synchaeta pectinata, Anureopsis fissa, Polyarthra vulgaris, Lecane clostrocerca, Arctodiaptomus acutilobatus, Hexarthra oxyuris, Polyarhtra dolichoptera and Arctodiaptomus bacillifer. The zooplankton composition of Lake Mogan has changed dramatically since the 1970s when rotifers did not dominate the community.

Rotifera Community Structure of Yeniçağa Lake, Turkey

ABSTRACT We characterized the Rotifera community in Yeniçağa Lake, Turkey between October 1997 and August 1999. Totally, twenty-two rotifer species were found, and their relative dominance showed significant seasonal variations. The most frequently occurring species were Keratella quadrata, Filinia longiseta, Brachionus urceolaris, and Asplanchna priodonta.

A short list of Cladoceran species (Crustacea) from Turkey

Abstract Between 1992 and 1999, the distribution of Cladoceran species was studied at 19 different localities in Central Anatolia, the Mediterranean region and the Western Black Sea region of Turkey, including six dams, 11 lakes and two rivers. A total of 31 species was recorded, some of which are recorded for the first time at these localities.