The R-package rbioacc allows to analyse experimental data from bioaccumulation tests where organisms are exposed to a chemical (exposure) then put into clean media (depuration). Internal concentrations are measured over time during the experiment. rbioacc provides turnkey functions to visualise and analyse such data. Under a Bayesian framework, rbioacc fits a generic one-compartment toxicokinetic model built from the data. It provides TK parameter estimates (uptake and elimination rates) and standard bioaccumulation metrics. All parameter estimates, bioaccumulation metrics and predictions of internal concentrations are delivered with their uncertainty. Bioaccumulation metrics are provided in support of environmental risk assessment, in full compliance with regulatory requirements required to approve market release of chemical substances. This paper provides worked examples of the use of rbioacc from data collected through standard bioaccumulation tests, publicly available within the scientific literature. These examples constitute step-by-step user-guides to analyse any new data set, uploaded in the right format.
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http://dx.doi.org/10.1016/j.ecoenv.2022.113875 | DOI Listing |
Sci Total Environ
December 2024
Study Program of Environmental Engineering, Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Campus C UNAIR, Jalan Mulyorejo, Surabaya 60115, Indonesia; Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, CN Delft 2628, Netherlands. Electronic address:
Heavy metal and microplastic pollutions are prevalent in freshwater ecosystems, with many freshwater bodies being contaminated by one or both of these pollutants. Recent studies reported extreme detections of Cd, Pb and Zn, high concentrations of Cr, Pb and Cu and microplastics acting as vectors of pollutants, including heavy metals. Mayflies can serve as bioindicators of heavy metal contamination in freshwater ecosystems because changes in their community structure, physiology, and behaviour can reflect and help predict the concentrations of metals in these environments.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
January 2025
Department of Environmental Science, University of Latvia, Jeglavas Street 1, Riga, LV-1004, Latvia.
Microplastics (MPs) have become a critical pollutant, accumulating in aquatic ecosystems and posing significant environmental and human health risks. Approximately 5.25 trillion plastic particles float in global oceans, releasing up to 23,600 metric tonnes of dissolved organic carbon annually, which disrupts microbial dynamics.
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, MN 55108, United States of America. Electronic address:
Chemosphere
November 2024
Department of Ocean Integrated Science, Chonnam National University, Yeosu, 59626, South Korea; Fisheries Science Institute, Chonnam National University, Yeosu, 59626, South Korea. Electronic address:
This study investigates the influence of seasonal monsoon flooding on heavy metal contamination and bioaccumulation in benthic macroinvertebrate communities within a stream ecosystem. We analyzed sediment and benthic macroinvertebrate samples for eight heavy metals [zinc (Zn), chromium (Cr), nickel (Ni), lead (Pb), copper (Cu), arsenic (As), cadmium (Cd), and mercury (Hg)]) before (BF) and after (AF) a major flooding event. We found significant spatial and temporal variations in heavy metal concentrations were observed, with higher levels after the flood.
View Article and Find Full Text PDFSci Total Environ
December 2024
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei City, Taiwan. Electronic address:
Ingestive uptake is critical for understanding the accumulation and trophic transfer of chemicals and synthesized particles in general. This study explored the contribution of ingestion in the bioaccumulation of chemicals focusing on worms. Novel theory and equations were developed to derive fractional ingestive contribution, f, from a broad range of dietary uptake and accumulation studies, and to build a small dataset of f (n = 43) from relevant toxicokinetic and bioaccumulation measurements.
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