@misc{01HBZVDWQQRG6612WPSDRHPSAB,
  abstract     = {{Within the Ecorelevance 5 project, we are investigating the ecological relevance of metal toxicity data on three species: Raphidocelis subcapitata (algae), Lemna minor and Daphnia magna. Standard toxicity tests are a simplification of the (ecological) reality and we aim to apply population models to better understand the ecological relevance of the toxicity data used in metal risk assessments.
For silver, Lemna minor was chosen as a primary producer to apply population models to. The aim of the current study is to extrapolate the available silver toxicity date for Lemna minor to more cologically relevant conditions and to evaluate silver effects at the population level.
For the Ag toxicity dataset from Arijs et al. 2021, extrapolation of the available toxicity data for silver to realistic field conditions resulted in lower effects on maximum biomass and growth rate. Typically NOEC or EC10 values of the Lemna test are used for risk assessment. The ratio of the population EC10 / original EC10 (on root length as endpoint) is 9.7 for maximum population growth rate and 79 for maximum population biomass. Comparison with the frond growth rate EC10 resulted in ratios of 2.6 for maximum population growth rate and 21 for maximum population biomass.
Scenario simulations for different nutrient conditions indicate that silver effects on maximum biomass are predicted to be more pronounced at lower nutrient levels, although effects were still lower compared to the toxicity test. This suggests that a risk assessment based on the results of the original toxicity test will overpredict the effects of silver on Lemna minor populations at low concentrations.}},
  author       = {{viaene, Karel and De Schamphelaere, Karel}},
  language     = {{eng}},
  pages        = {{14}},
  publisher    = {{Ghent University & ARCHE Consulting}},
  title        = {{Ecorelevance 5 : population effects of silver on Lemna minor}},
  year         = {{2022}},
}