One common methodology implemented in studies in several U . S . states including Texas, Florida, and California is to indirectly link estuarine resources ( i . e . integrity-species composition, biomass, diversity; function-primary production, secondary production, nutrient recycling; sustainability-habitats, valued resources, ecosystem services ) to freshwater inflow ( i . e . quantity-timing, frequency, duration, extent; quality; tidal connections ) through estuarine conditions ( i . e . salinity; sediment; dissolved material; particulate material ).
