Required EcoregionParameters columns (PnET-Succession)
dot-pnetEcoregionRequiredCols.RdRequired columns of the PnET-Succession ecoregion-parameters input file
(§9 of the user guide). The first column gives the ecoregion name.
ClimateFileName may be omitted if the climate library is used (i.e., when
ClimateConfigFile is supplied at the top level).