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Öğe Analysis of Toxic Metal-Induced Ecological Risk in Kepez Stream, Çanakkale, Türkiye(2023) Çavuş, Havva; Kükrer, Serkan; Sağlam, Müberra; Erginal, Ahmet EvrenEcological risk in the mouth of Kepez Stream has recently increased notably due to waste from the Kepez settlement, agricultural activity in the Kepez delta, maritime traffic in the Çanakkale Strait, and summer houses in the coastal area. This study analyzed the ecological risk of 10 sediment samples along the bed in the mouth of Kepez Stream to shed light on anthropogenically induced pollution. The pollution proxies such as chlorophyll degradation products, heavy metal concentrations and organic carbon of the sediment samples were determined. Enrichment Factor (EF), Contamination Factor (CF), Geoaccumulation Index (Igeo) and Potential Ecological Risk Index (PER) were calculated from the results obtained. Spearman's correlation analysis and factor analysis were also performed. The obtained data show that there is moderate enrichment of Zn, As and Co, a significant level of Pb, and very high level of Cr in the sediments of Kepez Stream. Ni enrichment was determined to be excessive and poses a high potential ecological risk. Cleaning and rehabilitation need to be carried out urgently in the mouth of Kepez Stream. It should be determined whether metals are being transmitted to aquatic organisms, and measures should be taken to reduce the sources of pollution.Öğe Ecological Risks Caused by Heavy Metal Accumulation in Umurbey Plain (NW Türkiye)(İstanbul Üniversitesi, 2024) Bay, Özender; Kükrer, Serkan; Erginal, Ahmet EvrenThis study aims to assess the ecological risks in the agricultural soils of the Umurbey Plain in Çanakkale, NW Türkiye. To evaluate the anthropogenic impact on the studied soil samples, various indices and statistical analyses were employed. Our results revealed that the elements Cu, Cr, and Ni exhibited very high contamination levels at all stations. As showed high contamination at nearly all other stations, with a strong positive correlation to CaCO₃. Ni, Cd, Cr, and As demonstrated moderate to significant enrichment at these stations. Cu displayed very high to significant enrichment, likely associated with the use of bordeaux mixture in fruit orchards. The calculated average mEri values indicated that Ni, As, Cu, and Cd posed significant potential ecological risks at many stations, while other elements, including Hg and Tl, also presented risks. The Spearman correlation analysis among the variables revealed that the sources of the metals Pb, Zn, Mn, Fe, V, and Cd differed from those of Ni, As, and Cr.Öğe Environmental impact of potentially toxic elements accumulated in surface sediments of the Erikli Lagoon, Black Sea coast (Turkiye)(Walter De Gruyter Gmbh, 2024) Kükrer, Serkan; Uludağ, Musa; Erginal, Gülsen; Erginal, Ahmet EvrenThis study aims to (a) determine the concentration and distribution of elements in the surface sediments of the Erikli Lagoon, which are under natural and anthropogenic pressure, (b) determine possible effects on the environment using ecological indices, and (c) reveal possible sources. Multiple elements, total organic carbon and chlorophyll degradation products were analyzed in sediment samples. Enrichment factor (EF), contamination factor (CF), and geoaccumulation index (Igeo) were calculated to determine the sources of the elements. Modified hazard quotient (mHQ), ecological contamination index (ECI), contamination severity index (CSI) and potential ecological risk index (PERI) were calculated to determine ecological risks. It was found that Mn, Hg, As, Fe and Cd entering the lake are of anthropogenic origin. These elements pose a low to moderate ecological threat to the lake. Agricultural and domestic discharges and atmospheric deposition are the main sources of these elements. A moderate ecological risk with an average value of 194.89 was determined in the lagoon based on PERI and contamination levels of metals. The elements that pose this risk are Hg and Cd, due to their high toxicity. According to ECI and CSI, the ecological risk is low, with average values of 0.99 and 0.30, respectively.Öğe Trace Metal-Induced Ecological Risk Analysis of Sarıçay River Sediments, Çanakkale, NW Turkey(2022) Akarsu, Taylan; Kükrer, Serkan; Erginal, Ahmet EvrenMetals have come to the fore among the pollutants monitored in aquatic ecosystems in recent years. Fresh waters especially constitute a \"hot spot\" due to their limited reserves. In order to analyze the sources of metal-induced pollution, ecological risk level and pollutants of the Sarıçay River passing through the city of Çanakkale, sediment samples were collected from 26 stations and element analyses were carried out in ICP-MS. Anthropogenic effects and the risks they cause were determined by calculating the enrichment factor, geoaccumulation index, and potential ecological risk from the obtained data. Anthropogenic enrichment was detected for Cr, Ni, Pb, Au, Ag and Ba, Bi, Tl, Na, Zn, Mg, K, As, Sb, and Mn with the largest amount being Cd. The level of enrichment varies from moderate to very high. According to the results of risk analysis, a moderate risk for Cd was determined and a very high risk for Ni and Pb. Agricultural activities, atmospheric deposition and mineral deposits in the basin were identified as the major sources from the multivariate statistical analysis performed to determine the main sources of metal inflows.
