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Title: ECOTOXICOLOGICAL ASSESSMENT OF PESTICIDES IN THE JIUL DE EST BASIN – UNVEILING SEASONAL DYNAMICS AND BIODIVERSITY THREATS
ECOTOXICOLOGICAL ASSESSMENT OF PESTICIDES IN THE JIUL DE EST BASIN – UNVEILING SEASONAL DYNAMICS AND BIODIVERSITY THREATS

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Alexandru Florin Simion; Vlad Alexandru Lautaru; Angelica Nicoleta Gaman; Sorin Victor Simion; Marius Emilian Kovacs
10.5593/sgem2025/5.1/s19.010
10.5593/sgem2025/5.1
1314-2704
978-619-7603-85-9
English
25
5.1
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA• Prof. DSc. Ildiko Tulbure, GERMANY• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
Ecology, Biodiversity, and Environmental Protection
The research investigates the impact of persistent organic pollutants, particularly pesticides, on the aquatic ecosystems of the Jiul de Est basin. Pesticides are introduced into water bodies via surface runoff, infiltration, and atmospheric deposition, and their bioavailability is influenced by factors such as pH, temperature, and dissolved organic matter. The research evaluates the ecotoxicological effects on key aquatic species, including Salmo trutta fario (river trout) and Squalius cephalus (common chub), by assessing sensitivity to various pesticides. These chemicals are classified by toxicity levels using LD50 values and are further analyzed with an ecological impact index (Ie) defined as the ratio of measured concentrations to LC50 values. Seasonal variations show lower pesticide levels during summer and increased risks in autumn, reflecting the influence of climatic conditions and agricultural practices. Although pesticide concentrations generally remain within regulatory limits, the cumulative effects and seasonal fluctuations highlight potential threats to biodiversity. The ecological impact index (Ie) offers a detailed risk assessment, categorizing impacts into high, moderate, and low levels based on numerical thresholds. Despite compliance with legal standards, the findings underscore the critical need for proactive environmental surveillance and implementing targeted management strategies to mitigate the long-term adverse effects on aquatic ecosystems.
[1] Simion A., Apostu, I. M., Evaluation of water quality and aquatic ecosystems from the eastern part of Jiu Valley. 18th International Multidisciplinary Scientific Geoconferences SGEM 2018, pp. 377-384, 2018, ISBN 978-619-7408-46-1.
[2] Negru N., Radu S. M., Soica, A., Air Quality Monitoring and Photovoltaic Impact Assessment in Valea Jiului, 25th International Carpathian Control Conference (ICCC), Poland, 2024, pp. 1-6, DOI: 10.1109/ICCC62069.2024.10569698.
[3] Mehmetli E., Koumanova B., The fate of persistent organic pollutants in the environment. Springer Science & Business Media, 2007, ISBN 13 978-1-4020-6640-5.
[4] Toth L., Calamar A., Irimia A., Simion S., Simion A., Research on aquatic pollution level of Maleia river by simulation in computational fluid dynamics, Environmental Engineering & Management Journal (EEMJ), 18(4), 2019.
[5] Mahmood I., Imadi S. R., Shazadi K., Gul A., Hakeem K. R., Effects of pesticides on environment, Plant, soil and microbes: volume 1: implications in crop science, 253-269, 2016, DOI. 10.1007/978-3-319-27455-3_13, ISBN: 978-3-319-27455-3.
[6] Krithiga T., Sathish S., Renita A. A., Prabu D., Lokesh S., Geetha R., ... & Sillanpaa, M., Persistent organic pollutants in water resources: Fate, occurrence, characterization and risk analysis, Science of The Total Environment, 831, 2022, 154808.
The current paper was carried out through the Nucleu Program within the National Research Development and Innovation Plan 2022-2027, carried out with the support of MCID, project no. PN 23 32 01 01, IOSIN PCDIEX.
conference
https://doi.org/10.5593/sgem2025/5.1/s19.010
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ECOTOXICOLOGICAL ASSESSMENT OF PESTICIDES IN THE JIUL DE EST BASIN – UNVEILING SEASONAL DYNAMICS AND BIODIVERSITY THREATS
Proceedings of 25th International Multidisciplinary Scientific GeoConference SGEM 2025, Volume 25, Issue 5.1
25th International Multidisciplinary Scientific GeoConference SGEM 2025, Volume 25, Issue 5.1, 29 June - 6 July, 2025
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
83-90
29 June - 6 July, 2025
website
10452
aquatic ecosystems, bioaccumulation, ecotoxicology, environment, Jiul de Est river, persistent organic pollutants (POPs), small-scale agriculture, water pollution

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