Predicted aquatic and human health risks associated with the presence of metals in the Syr Darya and Shardara Reservoir, Kazakhstan.

Autor: Allen DS; Department of Biology, Texas Christian University, Fort Worth, TX 76129, USA., Kolok AS; Idaho Water Resources Research Institute, University of Idaho, Moscow, ID 83844, USA., Snow DD; Water Sciences Laboratory, University of Nebraska, Lincoln, NE 68583, USA., Satybaldiyev B; Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty, Kazakhstan., Uralbekov B; Center of Physical Methods of Research and Analysis, Al-Farabi Kazakh National University, Almaty, Kazakhstan and LLP <>, Almaty, Kazakhstan., Nystrom GS; Department of Biology, Texas Christian University, Fort Worth, TX 76129, USA., Thornton Hampton LM; Department of Biology, Texas Christian University, Fort Worth, TX 76129, USA., Bartelt-Hunt SL; Department of Civil and Environmental Engineering, University of Nebraska, Lincoln, NE 68583, USA., Sellin Jeffries MK; Department of Biology, Texas Christian University, Fort Worth, TX 76129, USA. Electronic address: m.jeffries@tcu.edu.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Feb 10; Vol. 859 (Pt 1), pp. 159827. Date of Electronic Publication: 2022 Nov 05.
DOI: 10.1016/j.scitotenv.2022.159827
Abstrakt: Due to the decline of the Aral Sea fishery and recent efforts to expand the fisheries sector in Kazakhstan for both local consumption and global export, there is a need to sustain other fisheries in the area, including the Shardara Reservoir, which lies in the Syr Darya basin. Metals are present in the Syr Darya; yet, their impacts on fishery and consumer health remain unclear. Thus, the objectives of this study were to evaluate: 1) the potential impacts of metals on Syr Darya basin fish and 2) the human health risks posed by consumption of Shardara Reservoir fish. The health of the fishery was assessed by comparing surface water metal concentrations to maximum permissible concentrations (MPCs), calculating water quality index (WQI) and degree of contamination (C d ) values, and evaluating gene expression biomarker responses in wild-caught roach (Rutilus rutilus). To assess the risk to consumers, metal concentrations in roach were used to calculate hazard quotients (HQs) and hazard indices (HIs). Water concentrations of Cu, Fe, Mn, Se, Sr and V exceeded MPCs and all sites were classified as highly polluted based upon WQI and C d values. This, along with site-specific differences in the expression of genes associated with xenobiotic metabolism and oxidative stress in roach, indicates potential risks to the fishery. Though all HQs and HIs were below 1 indicating a lack of significant risk to consumers, Pb levels in roach exceeded MPCs for safe consumption indicating a potential risk. Given the potential risks to the fishery and consumers, the development of pollution monitoring and management programs are warranted. The work presented here provides initial monitoring data that can be used to aid such efforts and also underscores the need to identify environmental stressors that may thwart the anticipated growth of fisheries in this region.
Competing Interests: Declaration of competing interest Dan Snow, Alan Kolok, Shannon Bartelt-Hunt, and Marlo Jeffries report financial support was provided by National Science Foundation. Bolat Uralbekov reports financial support was provided by Committee of Science of the Ministry of Education and Science of the Republic of Kazakhstan.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: