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<p>Urban streams are increasingly affected by historical and ongoing industrial pollution. This study examined the distribution and bioaccumulation of metals and metalloids (MM) along the Aygalades stream (Marseille, France), a highly impacted urban watershed. One important finding was the widespread and severe contamination by metals and metalloids (MM) throughout the stream, with concentrations reaching exceptionally high levels. Sediments and soils showed extremely high concentrations of Cu, Pb, As, and Cr, while water showed localized chromium peaks suggesting direct industrial inputs, reflecting both legacy and current contamination sources. A second key feature is the high bioaccumulation observed in various freshwater organisms, particularly in benthic macroalgae <i>Cladophora glomerata</i>, which showed exceptional MM accumulation, especially for Cr and Pb, confirming its value as a biomonitor. Macroinvertebrates such as <i>Baetis rhodanii</i> and <i>Caenis luctuosa</i> also exhibited elevated metal concentrations, suggesting potential exposure to contaminated sediments and other environmental sources, while tolerant crustaceans (<i>Gammarus pulex</i>, <i>Asellus aquaticus</i>) showed comparatively lower concentrations, suggesting differences in metal regulation among taxa. Riparian plants (<i>Rubus ulmifolius</i>, <i>Ficus carica</i>) also accumulated metals, supporting their potential use in phytostabilization. Overall, MM concentrations in biotic compartments generally mirrored spatial contamination patterns observed in abiotic matrices. These findings revealed extensive contamination across environmental compartments and taxa, illustrating the urban stream syndrome and emphasizing the long-term ecological consequences of industrial pollution in urban streams.</p>

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Metals and Metalloids Contamination Patterns in Abiotic and Biotic Compartments Along an Urban Mediterranean Stream

  • 期刊论文

  • 发表日期：

    2026年7月25日

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  • Hadrien Fanton,
  • Evelyne Franquet,
  • Laurence Affre,
  • Bernard Angeletti,
  • Céline Bertrand,
  • Laurent Cavalli,
  • Estelle Dumas,
  • Anne-Marie Farnet da Silva,
  • Nicolas Kaldonski,
  • Eric Meineri,
  • Pascale Prudent,
  • Thierry Tatoni,
  • Stéphanie Fayolle

摘要

Urban streams are increasingly affected by historical and ongoing industrial pollution. This study examined the distribution and bioaccumulation of metals and metalloids (MM) along the Aygalades stream (Marseille, France), a highly impacted urban watershed. One important finding was the widespread and severe contamination by metals and metalloids (MM) throughout the stream, with concentrations reaching exceptionally high levels. Sediments and soils showed extremely high concentrations of Cu, Pb, As, and Cr, while water showed localized chromium peaks suggesting direct industrial inputs, reflecting both legacy and current contamination sources. A second key feature is the high bioaccumulation observed in various freshwater organisms, particularly in benthic macroalgae Cladophora glomerata, which showed exceptional MM accumulation, especially for Cr and Pb, confirming its value as a biomonitor. Macroinvertebrates such as Baetis rhodanii and Caenis luctuosa also exhibited elevated metal concentrations, suggesting potential exposure to contaminated sediments and other environmental sources, while tolerant crustaceans (Gammarus pulex, Asellus aquaticus) showed comparatively lower concentrations, suggesting differences in metal regulation among taxa. Riparian plants (Rubus ulmifolius, Ficus carica) also accumulated metals, supporting their potential use in phytostabilization. Overall, MM concentrations in biotic compartments generally mirrored spatial contamination patterns observed in abiotic matrices. These findings revealed extensive contamination across environmental compartments and taxa, illustrating the urban stream syndrome and emphasizing the long-term ecological consequences of industrial pollution in urban streams.