ROMS has several biological models and each model requires different parameters. The name of the biological parameter input file is set by the BPARNAM keyword in the ocean.in file. Template standard input ASCII files for each of the biological models can be found in the User/External subdirectory of the ROMS source code. In order to include a biological model in ROMS you must set BPARNAM correctly and activate the corresponding CPP option. For example, if you wish to include the EcoSim model you must set BPARNAM to point your ecosim.in file and you must activate the ECOSIM CPP option.
Notice: Detailed information about ROMS input script file syntax can be found here.