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A 2.5-year genotoxicity profile for a partially restored polluted river
Nanthawan Avishai1, Claudette Rabinowitz, Baruch Rinkevich
1National Institute of Oceanography, Israel Oceanographic & Limnological Research, Tel-Shikmona, P.O. Box 8030, Haifa 31080, Israel.
Environmental Science & Technology
|August 7, 2004
Summary
Water genotoxicity in Israel's Kishon River decreased in 2002. Despite reductions, summer samples showed higher genotoxicity than winter samples, indicating ongoing environmental concerns.
Area of Science:
- Environmental Science
- Ecotoxicology
- Genetics
Background:
- The Kishon River, Israel's most polluted river, is undergoing restoration efforts.
- Assessing water genotoxicity is crucial for monitoring river health and restoration success.
Purpose of the Study:
- To evaluate the genotoxicity of Kishon River water from 2001 to 2003.
- To identify spatial and temporal variations in river water genotoxicity.
Main Methods:
- Water samples collected bimonthly from five sites (January 2001-May 2003).
- Genotoxicity assessed using the alkaline comet assay with a fish hepatoma cell line (RTH-149).
- Four genotoxicity parameters analyzed: comet percentage, damage score, comet tail length, and cumulative tail length.
Main Results:
- Overall genotoxicity reduced in 2002 compared to 2001.
- Significant genotoxicity detected in most samples compared to controls.
- Summer samples were generally more genotoxic than winter samples.
- Histadrut Bridge and Haifa fishing harbor identified as most polluted sites; Kiryat Haroshet as least polluted.
Conclusions:
- Kishon River water exhibits significant genotoxicity, though levels decreased in 2002.
- Temporal and spatial variations in genotoxicity highlight the need for ongoing monitoring.
- A long-term genotoxicity follow-up plan is recommended to assess chronic effects and restoration efficacy.