Autor según el artículo: Roberta C; Lorenzo NE; Llopart JS; Kumar V; Schuhmacher M
Departamento: Enginyeria Química
Autor/es de la URV: Kumar, Vikas / Schuhmacher Ansuategui, Marta
Código de proyecto: TECSPR17-1-0012
Palabras clave: Toxicity Surface water monitoring River biofilm Photosynthesis Pam-fluorometry Impacts Heavy metal Functional recovery Fresh-water Fluvial biofilms Fluorescence Ec50 Copper Communities Chemical speciation
Resumen: © 2020 Elsevier B.V. River biofilms are a suitable indicator of toxic stress in aquatic ecosystems commonly exposed to various anthropogenic pollutants from industrial, domestic, and agricultural sources. Among these pollutants, heavy metals are of particular concern as they are known to interfere with various physiological processes of river biofilm, directly or indirectly related to photosynthetic performance. Nevertheless, only limited toxicological data are available on the mechanisms and toxicodynamics of heavy metals in biofilms. Pulse Amplitude Modulated (PAM) fluorometry is a rapid, non-disruptive, well-established technique to monitor toxic responses on photosynthetic performance, fluorescence-kinetics, and changes in yield in other non-photochemical processes. In this study, a new micro-PAM-sensor was tested to assess potential acute and chronic effects of heavy metals in river biofilm. Toxicity values across the three parameters considered in this study (photosynthetic yield YII, non-photochemical quenching NPQ, and basal fluorescence F0) were comparable, as determined EC50 were within one order of magnitude (EC50 ∼1−10 mg L−1). However, the stimulation of NPQ was more clearly associated with early acute effects, especially in illuminated samples, while depression of YII and F0 were more prevalent in chronic tests. These results have implications for the development of functional indicators for the biomonitoring of aquatic health, in particular for the use of river biofilm as a bioindicator of water quality. In conclusion, the approach proposed seems promising to characterize and monitor the exposure and impact of heavy metals on river periphyton communities. Furthermore, this study provides a fast, highly sensitive, inexpensive, and accurate laboratory method to test effects of pollutants on complex periphyton communities that can also give insights regarding the probable toxicological mechanisms of heavy metals on photosynthetic performance in the river biofilm.
Áreas temáticas: Zootecnia / recursos pesqueiros Toxicology Química Odontología Medicina veterinaria Medicina i Materiais Marine & freshwater biology Interdisciplinar Health, toxicology and mutagenesis Geociências General medicine Filosofía Farmacia Engenharias iii Engenharias i Educação física Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Biotecnología Biodiversidade Astronomia / física Aquatic science
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: vikas.kumar@urv.cat marta.schuhmacher@urv.cat
Identificador del autor: 0000-0002-9795-5967 0000-0003-4381-2490
Fecha de alta del registro: 2024-07-27
Versión del articulo depositado: info:eu-repo/semantics/submittedVersion
Programa de financiación: TECNIOspring PLUS
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Aquatic Toxicology. 231 (105732): 105732-
Referencia de l'ítem segons les normes APA: Roberta C; Lorenzo NE; Llopart JS; Kumar V; Schuhmacher M (2021). Characterization of river biofilm responses to the exposure with heavy metals using a novel micro fluorometer biosensor. Aquatic Toxicology, 231(105732), 105732-. DOI: 10.1016/j.aquatox.2020.105732
Acrónimo: TOXMIC Toxicant monitoring chamber for microcontaminants
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2021
Acción del progama de financiación: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 712949 and the Government of Catalonia's Agency for Business Competitiveness(ACCIÓ)
Tipo de publicación: Journal Publications
Repositori URV