現地型計測機器による付着藻類現存量測定とその有効性に関する考察

抄録

Attached algae feed consumers such as fish and benthic invertebrates, and hence play a role of primary production in streams and rivers. Therefore, quantification of attached algae would be useful for monitoring and management of the ecosystem. Standard method for the quantification conducted in vivo requires much time and cost (sample handling and transport to the laboratory and extraction into ethanol/acetone with spectrofluorometry, or examination under microscope) in conventional studies. Because these processes are sensitive and need specific experiences and skills, the simple method for the quantification of attached algal community is strongly demanded.

The present study introduces the submersible fluorescence probe "Bentho-Fluor" which can independently measure chlorophyll a of diatom, chlorophyta and cyanobacteria of attached algal community in situ condition. By comparing the measurements with fluorescence probe and the cell densities of dominant species in algal community, we could find availability of using the Bentho-Fluor in monitoring of river ecosystem.