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The measurement
of Iiving chlorophyII fIuorescence (hereafter, in-vivo) has become
popuIar as it provides an indication of the biomass of a phytopIankton
population. The popularity of this measurement has resuIted in the
demand of in-situ fIuorescence photometers such as the AIec EIectronics
CLOROTEC.
AIthough measuring Chlorophyll-a (hereafter, ChI-a) serves as an
index of the biomass of a phytopIankton population, it does not
identify the species composition.
This instrument emits the modulated lights of different wavelengths
on the phytoplankton to excite. When the intensity of excited red
fIuorescence is detected, their fIuorescence spectra are measured
consecutively. The spectrum characteristic depends on coIor composition
and the information Ieads to an assumption of species composition
of pIankton popuIation, Iike cyanophyceae, baciIIariophyceae and
chlorophyceae.
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