public void AddNewCohort(ISpecies species, ActiveSite site)
        {
            Cohort cohort = new Cohort(species, (ushort)Date.Year, IMAX, species.InitialNSC(), species.DNSC());

            if(SiteOutputNames.ContainsKey(site))
            {
                cohort.InitializeOutput(SiteOutputNames[site], (ushort)Date.Year, PlugIn.ModelCore.UI.WriteLine);
            }

            sitecohorts[site].AddNewCohort(cohort, Timestep);
        }