title: Respective contributions of diet and medium to the bioaccumulation of pharmaceutical compounds in the first levels of an aquatic trophic web.
abstract: Nowadays, pharmaceuticals (PCs) are ubiquitous in aquatic ecosystems. It is known that these compounds have ecotoxic effects on aquatic organisms at low concentrations. Moreover, some of them can bioaccumulate inside organisms or trophic webs exposed at environmental concentrations and amplify ecotoxic impacts. PCs can bioaccumulate in two ways: exposure to a medium (e.g., respiration, diffusion, etc.) and/or through the dietary route. Here, we try to assess the respective contributions of these two forms of contamination of the first two levels of an aquatic trophic web. We exposed Daphnia magna for 5 days to 0, 5, and 50 μg/L (15)N-tamoxifen and then fed them with control and contaminated diets. We used an isotopic method to measure the tamoxifen content inside the daphnids after several minutes' exposure and every day before and after feeding. We found that tamoxifen is very bioaccumulative inside daphnids (BCF up to 12,000) and that the dietary route has a significant impact on contamination by tamoxifen (BAF up to 22,000), especially at low concentrations in medium.
authors: Université de Lyon; ENTPE; Université Lyon 1; CNRS; UMR 5023 LEHNA, 2 Rue Maurice Audin, 69518, Vaulx-en-Velin, France. frederic.orias@entpe.fr.
authors: Frédéric
authors: F
authors: Orias
authors: Université de Lyon; ENTPE; Université Lyon 1; CNRS; UMR 5023 LEHNA, 2 Rue Maurice Audin, 69518, Vaulx-en-Velin, France.
authors: Laurent
authors: L
authors: Simon
authors: Université de Lyon; ENTPE; Université Lyon 1; CNRS; UMR 5023 LEHNA, 2 Rue Maurice Audin, 69518, Vaulx-en-Velin, France.
authors: Yves
authors: Y
authors: Perrodin
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000187:drug effects* / Q000378:metabolism; D000458:Cyanobacteria / Q000187:drug effects* / Q000378:metabolism; D003621:Daphnia / Q000187:drug effects* / Q000378:metabolism; D017753:Ecosystem; D020387:Food Chain; D004364:Pharmaceutical Preparations / Q000032:analysis* / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D004364:Pharmaceutical Preparations; D014874:Water Pollutants, Chemical
keywords: Bioaccumulation; Bioconcentration; Pharmaceutical compound; Stable isotopes; Tamoxifen