Determination of the Biomass of Aquatic Plants Using an Optical Method

Abstract
1. A method, based on that proposed by Westlake (1964), of determining the quantitative distribution of aquatic plants from underwater light distributions is described. 2. Vertical attenuation coefficients for several species of aquatic plants have been determined in the field and compared with those obtained using laboratory procedures. 3. An example is given of the application of this method to determine the effect of a herbicide on the biomass of Elodea canadensis present in a small lake.

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