01311nas a2200121   4500008004100000245006800041210006600109300001300175490000700188520088200195100001801077856009401095       2007                        eng d00aTrophic state, eutrophication, and nutrient criteria in streams0 aTrophic state eutrophication and nutrient criteria in streams  a669 -6760 v223 aTrophic state is the property of energy availability to the food web and defines the foundation of community integrity and ecosystem function. Describing trophic state in streams requires a stoichiometric (nutrient ratio) approach because carbon input rates are linked to nitrogen and phosphorus supply rates. Light determines the source of carbon. Cross system analyses, small experiments and ecosystem level manipulations have recently advanced knowledge about these linkages, but not to the point of building complex predictive models that predict all effects of nutrient pollution. Species diversity could indicate the natural distribution of stream trophic status over evolutionary time scales. Delineation of factors that control trophic state and relationships with biological community properties allows determination of goals for management of stream biotic integrity.1 aDodds, W., K.  uhttp://knz.lternet.edu/content/trophic-state-eutrophication-and-nutrient-criteria-streams