Publicación: Exposure to heavy metal-contaminated sediments disrupts gene expression, lipid profile, and life history traits in the midge Chironomus riparius
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2020
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info:eu-repo/semantics/openAccess
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Resumen
Despite the concern about anthropogenic heavy metal accumulation, there remain few multi-level ecotoxicological studies to evaluate their effects in fluvial ecosystems. The toxicity of field-collected sediments exhibiting a gradient of heavy metal contamination (Cd, Pb, and Zn) was assessed in Chironomus riparius. For this purpose, larvae were exposed throughout their entire life cycle to these sediments, and toxic effects were measured at different levels of biological organization, from the molecular (lipidomic analysis and transcriptional profile) to the whole organism response (respiration rate, shape markers, and emergence rate). Alterations in the activity of relevant genes, as well as an increase of storage lipids and decrease in membrane fluidity, were detected in larvae exposed to the most contaminated sediments. Moreover, reduced larval and adult mass, decrease of larval respiration rate, and delayed emergence were observed, along with increased mentum and mandible size in larvae and decreased wing loading in adults. This study points out the deleterious effects of heavy metal exposure at various levels of biological organization and provides some clues regarding the mode of toxic action. This integrative approach provides new insights into the multi-level effects on aquatic insects exposed to heavy metal mixtures in field sediments, providing useful tools for ecological risk assessment in freshwater ecosystems.
Descripción
The registered version of this article, first published in “Water Research, Volume 168, 2020", is available online at the publisher's website: Elsevier, https://doi.org/10.1016/j.watres.2019.115165
La versión registrada de este artículo, publicado por primera vez en “Water Research, Volume 168, 2020", está disponible en línea en el sitio web del editor: Elsevier, https://doi.org/10.1016/j.watres.2019.115165
Categorías UNESCO
Palabras clave
larval development, lipidomic, transcriptional alterations, shape markers, integrative approach, endocrine disruption
Citación
Hélène Arambourou, Lola Llorente, Iñigo Moreno-Ocio, Óscar Herrero, Carlos Barata, Inmaculada Fuertes, Nicolas Delorme, Leire Méndez-Fernández, Rosario Planelló, Exposure to heavy metal-contaminated sediments disrupts gene expression, lipid profile, and life history traits in the midge Chironomus riparius, Water Research, Volume 168, 2020, 115165, ISSN 0043-1354, https://doi.org/10.1016/j.watres.2019.115165
Centro
Facultades y escuelas::Facultad de Ciencias
Departamento
Física Matemática y de Fluídos