Abstract
Field experiments to estimate chlorophyll a of benthic algae habited at tidal flat were carried out by using portable fluorometer in the period from February to September, 2005. Chlorophyll a values obtained by fluorometer with in vivo analysis and by chemical analysis of DMF reagent indicate approximately in linear. The fluorometer method was introduced to measure a distribution of benthic algae quantity in some different conditions. For example, the survey results indicated that quantity of benthic algae was related to the habited ground elevation. It is ensured by the field test that this portable fluorometer enables much easily to evaluate a distribution of benthic algae.
