This is a model of the vertical particle flux, in which stratified predator-prey interactions affect the vertical particle flux. The result is discussed in a paper by Jackson and Burd (2002). The program is written in matlab. To run it, open matlab, go to the directory with the script, and invoke it by typing vertical_pred_prey. The parameters are set in the first part of the code, with descriptions of their units in the comments. You can change their values by editing the file.

Jackson, G.A. and A.B. Burd; U.S. JGOFS Synthesis & Modeling Project - Data. U.S. JGOFS. iPub: October 2004. 'date you accessed the data' http://usjgofs.whoi.edu/mzweb/data/Jackson/vertical_pred_prey.m

Jackson, G. A., and A. B. Burd. 2002. A model for the distribution of particle flux in the mid-water column controlled by subsurface biotic interactions. Deep-Sea Research II 49: 193-217.