A SIMPLE APPROACH FOR ESTIMATING PHYTOPLANKTON GROUPS AND DOC BY USING THE MULTI-EXCITER

Abstract

 We examined how to improve the accuracy of predicting phytoplankton groups and DOC by a relatively simple approach with an in situ fluorometor(the Multi-Exciter).

 The nine-wavelength excitation fluorescence spectrum of DCOM and size-fractionated phytoplankton groups using 0.7μm and 20μm filters were measured by the Multi-Exciter, and new norm spectrum of small phytoplankton and DCOM were obtained. By combining these with the spectrum on diatom, green algae and cyanobacteria, we could improve the prediction of colony formation and bloom of cyanobacteria. In addition, we confirmed the possibility to estimate the Chl.a of small phytoplankton and DOC.