Software Description
This model predicts trophic magnification factors (TMFs) in aquatic food webs for up to 7 species. There are three models present each in separate sheets to represent a pelagic food web, a detritus food web, and a combined pelagic and detritus aqua food web. In each model the blue highlighted cells indicate user inputs, green cells indicate fugacity-related values. Users can input chemical properties for a particular chemical as well as its concentration in the water and sediment. A few other water properties may be inputted, as well as metabolism and growth rate constants, species properties including size, lipid content, and Q (ie ratio of input diet rate constant to output egestion rate constant, see paper for details). Diet preferences for all species can be inputted as desired and trophic levels (TL) can be assigned for the lowest level species, which are in equilibrium with the surrounding environment.
Results are found at the bottom of each worksheet in the form of a graph of the log fugacity (Pa ) of the chemical in each species vs the species' TL. The slope of this graph is translated into the TMF as:
TMF = 10^slope
TMF values are also listed beside the graph.
This model can be used to calculate TMFs and also to explore implications that various environmental factors may have on TMFs. Some examples include a chemical's log KOW value, organism size, lipid content, Q, dietary preferences and food web branching, metabolism, growth rate, differences between sediment and water concentrations, and spatial differences in feeding.
Features of the PBPK model:
This program was based on the following publication:
... to be announced ...
Required Input Data:
Chemical Properties
Model output includes:
Please read the software license before downloading the software. Use of the software constitutes your agreement to abide by the terms and conditions set out in the license agreement.