cca_calc_gradient       Plot Site Niche Position vs Environmental
                        Gradient (Step 4)
cca_calc_group          Calculate Niche Width Summary by Group (Step 5)
cca_calc_species        Calculate Species Niche Width and Position
                        (Step 3)
cca_fit_ordination      Fit CCA and Partial-CCA Ordination (Step 2)
cca_plot_group_env      Plot Sample/Group Niche Width vs Environmental
                        Gradient (Step 6)
cca_prep_env            Prepare Environmental Data for CCA (Step 1)
cca_workflow            CCA-Based Niche Analysis Workflow Controller
cca_workflow_gradient   Execute Gradient-Based Workflow (Steps 1-4)
cca_workflow_group      Execute Group-Based Workflow (Steps 1-2, 5-6)
gam_calc_sitewidth      Calculate Sample-Level Niche Width Weighted by
                        Abundance
gam_fit_model           Fit GAM-Based Niche Curves for All OTUs
gam_plot_species        Plot GAM-Based Niche Curve for a Single OTU
levins_calc_binned      Calculate Levins Niche Width Along a Gradient
                        (Binned States)
levins_calc_group       Calculate Community-Mean Levins Niche Width
                        Along a Gradient
levins_plot_pos_width   Plot Species Niche Position vs Levins Width
niche_width_calc        Calculate Niche Width (Samples as States)
plant_env               Example plant environmental table
plant_group             Example plant sample grouping
plant_otu               Example plant community abundance table
