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Evaluation of the Predictive Ecological Model for the Edwards Aquifer Habitat Conservation Plan An Interim Report as Part of Phase 2 (2016) / Chapter Skim
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Model Calibration and Testing
Pages 15-17

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From page 15...
... If the development team instead considers this limit to be related to colonization of adjacent cells, then this could be explicitly linked to the transition probabilities. Another option would be to have a variable translocation term, where more growth is allocated below ground as the above ground biomass in a cell becomes larger.
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From page 16...
... The strategy for calibration of the FD model was to vary the number of movement time steps needed to trigger mortality within the movement rules until simulated population abundance stayed near the maximum possible densities for 2003 to 2014. Additional simulations showed what happens if the density-dependent mortality is relaxed (see almost exponential increase)
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From page 17...
... Model responses at selected steps in this changed flow leading to a population response can be qualitatively compared to lab results and field data to confirm such intermediate effects are realistic. Propagating uncertainty and stochasticity through the FD model, while not adding to the validation credibility, would help in ensuring proper interpretation of model results and model differences predicted under different HCP scenarios.
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  • simulated abundances
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  • translocation term
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  • additional model

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  • model inputs
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  • rigorously compared
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  • scenarios feasible
  • realistic variations


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