Mechanistic TK/TD-model simulating the effect of growth inhibitors on Lemna populations

Walter Schmitt, Eric Bruns, Margit Dollinger and Peter Sowig

Ecological Modelling, 2013, vol. 255, issue C, 1-10

Abstract: A mechanistic combined toxicokinetic–toxicodynamic (TK/TD) and growth model for the aquatic macrophytes Lemna spp. has been developed. This model simulates the development of Lemna biomass under laboratory and environmental conditions. Growth of the Lemna population is simulated on basis of photosynthesis and respiration rates which are functions of environmental conditions, i.e., temperature, global radiation, N- and P-concentrations. The toxicodynamic sub-model describes the effects of growth-inhibiting substances by a respective reduction in the photosynthesis rate based on the Lemna spp. internal concentrations. Internal concentrations are calculated using a simple, one-compartment toxicokinetic model that considers the uptake of substances through the plant surface.

Keywords: TK/TD model; Population model; Lemna; Risk assessment; Metsulfuron-methyl (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:255:y:2013:i:c:p:1-10

DOI: 10.1016/j.ecolmodel.2013.01.017

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