ArticleBulletin of environmental contamination and toxicology2026
Sediment-Bound Metals in a Protected Karstic Lagoon: Seasonal Dynamics and Ecological Risk to Biota and Public Health.
Article in Bulletin of environmental contamination and toxicology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Coastal lagoons in karstic regions are highly vulnerable to anthropogenic inputs via permeable aquifers. This study evaluates heavy metal distribution and ecological/health risks in Ría Lagartos, Mexico. Surface sediments from eleven sites across three seasons were analyzed using geochemical indices (EF, Igeo, RI) and NOAA's SQuiRTs guidelines. Cadmium (Cd) and arsenic (As) were the primary contaminants, consistently exceeding SQuiRT thresholds with enrichment levels reaching "extremely severe". Spatial analysis linked hotspots to urban/waste sectors, with a Cd-Sn association indicating localized sources. While the overall potential ecological risk was low, localized exceedances for Cd, As, and Ni indicate specific ecotoxicological threats. Human health risk assessments identified significant concerns for arsenic exposure via ingestion, particularly for children. These findings emphasize the karst aquifer as a critical transport pathway and highlight the necessity for integrated geochemical and health monitoring in vulnerable coastal ecosystems.
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