Trophic Level Index calculation, macrophyte biomass recovery prediction, and aquatic biodiversity risk index β grounded in USDA NRCS and EPA aquatic ecosystem restoration science.
Compute the composite Trophic Level Index (TLI) for a lake using total nitrogen, total phosphorus, chemical oxygen demand, and chlorophyll-a β using the validated formula from Tang et al. (2026) cross-referenced with the Carlson Trophic State Index (TSI) used by EPA National Lakes Assessment.
Predict submerged macrophyte biomass recovery trajectory based on trophic state, nitrogen concentration, water temperature, and turbidity β calibrated against Tang et al. (2026) Random Forest importance rankings (NOβ 19.88%, TN 19.40%, TDS 15.91%, WT 15.20%) across mesotrophic, light-eutrophic, and medium-eutrophic lakes.
Assess the biodiversity risk and community stability of submerged aquatic vegetation using Shannon-Wiener diversity, Simpson index, species richness, and Pielou's evenness β calibrated against Tang et al. (2026) findings that mesotrophic lakes host 7β8 species (H = 1.60) while medium-eutrophic lakes retain only 2 species (H = 0.66).