Carlson's Trophic State Index
Carlson's index is one of the more commonly used trophic indices and is the trophic index used by the United States Environmental Protection Agency. The trophic state is defined as the total weight of biomass in a given water body at the time of measurement. Because they are of public concern, the Carlson index uses the algal biomass as an objective classifier of a lake or other water body's trophic status. According to the US EPA, the Carlson Index should only be used with lakes that have relatively few rooted plants and non-algal turbidity sources.
Read more about this topic: Trophic State Index
Famous quotes containing the words carlson, state and/or index:
“There is only one place for the women who served and that is on the same site with our brother soldiers. These women have touched thousands of those names on the wall. We have to be at that spot, physically, spiritually and emotionally.”
—Diane Carlson Evans (b. c. 1943)
“To place liberty in an indifferency, antecedent to the thought and judgment of the understanding, seems to me to place liberty in a state of darkness, wherein we can neither see nor say any thing of it.”
—John Locke (1632–1704)
“Exile as a mode of genius no longer exists; in place of Joyce we have the fragments of work appearing in Index on Censorship.”
—Nadine Gordimer (b. 1923)