trophic state index

The Trophic State Index (TSI) is a numerical scale used to assess the health of aquatic ecosystems, particularly lakes and reservoirs. It measures the level of nutrients, mainly phosphorus and nitrogen, which influence plant growth, especially algae. A lower TSI score indicates clearer water with less algae, signifying a healthier ecosystem (oligotrophic), while a higher score suggests more nutrients and algae, leading to murky water and potential problems for aquatic life (eutrophic). Understanding TSI helps in managing water quality and ensuring the sustainability of aquatic environments.