Determining the contribution of pigments and the nonalgal fractions to total absorption: Toward an improved algorithm

Varela, Ramiro A., Francisco G. Figueiras, Belén Arbones, Susana Agustí

Limnol. Oceanogr., 43(3), 1998, 449-457 | DOI: 10.4319/lo.1998.43.3.0449

ABSTRACT: Three methods that estimate the algal and nonalgal contributions to the total particulate matter light absorption were analyzed against the experimental Kishino method in a wide variety of environments. We found that one method gave better overall correlations and slopes closer to 1 than did the other methods, but the method overestimated the nonalgal fraction when the nonalgal absorption to total particulate matter absorption proportion in the sample was low. As a result, a correction is suggested and results are compared with those of the other methods, showing that the combined use of the original algorithm and the correction do configure a suitable basis for differentiating the algal and nonalgal fractions using as input only the total particulate light absorption data.

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