By pure chance, I've been contacted by a lecturer in Zimbabwe, Wilson Mhlanga. He has pointed me to some very useful resources on models for fisheries management and on representing and modelling foodwebs. The latter uses software called Ecopath, which has a big following and many models from many different countries. There is a great opportunity here for someone to focus on this particular type of model (which I think should convert to Simile/System Dynamics in a pretty straightforward way), and become the link person with a large and relevant parallel community.