Lead Accumulations in Biotic and Abiotic Components of Emet Stream, Uluabat Lake Basin, Turkey

Abstract.-Emet Stream is one of Turkey's most important river systems. It is used for purposes such as irrigation water, industrial water supply, receiving environment for domestic and industrial wastes and fishing activities around the regions that the stream passes. The aim of this study is to determine the lead levels both in biotic (fish tissues) and abiotic (water and sediment) components of Emet Stream. Water, sediment and fish samples (Squalius cii, (Richardson, 1857); Capoeta tinca, (Heckel, 1843); Barbus oligolepis, Battalgil, 1941) were collected from eight stations (one of them is on the Kınık Stream and one of them is on the Dursunbey Stream) on the Emet Stream seasonally between the dates of November 2010 -August 2011. According to data, the lowest Pb concentrations of water and sediment were determined in E1 station (0.00307 mg/L and 10.48 mg/kg); the highest Pb concentrations were determined in E4 station for water (0.02503 mg/L) and in E8 station for sediment (48.53 mg/kg). Pb accumulations in biotic and abiotic components of Emet Stream were determined as sediment > fish tissues > water; the Pb accumulations in tissues of S. cii and B. oligolepis follows as, liver > kidney > gill > muscle; in tissues of C. tinca follows as, kidney > liver > gill > muscle respectively and it was also determined that biotic components of system were highly affected by the lead

New Records of Diatoms (Bacillariales, Rhopalodiales & Surirellales) with Ultrastructure Details from the Black Sea Coast of Turkey

Diatoms associated with the order Bacillariales, Rhopalodiales and Surirellales are well known to be present in marine and brackish waters. In this study, diatoms in the western Black Sea coasts of Turkey were investigated with ultrastructure details. Species belonging to the Bacillariales, Rhopalodiales and Surirellales were subject to light microscopy (LM) and scanning electron microscopy (SEM) analysis, and a total of twenty-four taxa were investigated. This study examines details on the morphology and biogeography of the taxa with remarks on their distribution in Turkey. The results revealed that four species were reported on the Turkish coasts for the first time. These species were Nitzschia liebethruthii, N. volvendirostrata, Epithemia guettingeri and Campylodiscus scalaris