This study, conducted during the summer of 2003 in the southern sea of Korea, used our novel real–time monitoring system to monitor physical and chemical factors that may control the occurrence of red tides. The system, GlowTracka, measured bioluminescence in real–time, to indicate the presence of bioluminescent dinoflagellate species.
Unexpectedly, a sudden increase in the presence of dinoflagellates coincided with the lowest concentrations of dissolved inorganic nutrients. This data supports the hypothesis that the outbreak of dinoflagellate red tides is linked to the limited growth of diatoms under reduced levels of dissolved inorganic phosphorus and nitrogen. The study suggests that this real–time monitoring system can be used as an effective tool for both understanding and predicting dinoflagellate red tides in coastal oceans.
A Fluorometer (Seapoint Co.) and Glowtracka (Chelsea Instruments Ltd.) were used to measure the chlorophyll a and bioluminescence respectively. Glowtracka measures bioluminescence as an indicator of dinoflagellate abundance due to the high luminescent output of certain dinoflagellates. The concentrations of nutrients (NO3−, NO2−, PO43−, and Si(OH)4) were determined using a submersible multi–channel analyzer (Eco–LAB). This Eco–LAB utilizes the conventional colorimetric methods, which are a reliable wet chemistry technique.
Detect red-tide outbreaks with Glowtracka
Chelsea Technologies’ GlowTracka detects bioluminescence from dinoflagellates and similar organisms. Originally developed by Plymouth Marine Laboratory in the UK, GlowTracka’s precision flow meter stimulates bioluminescent organisms and measures the light flashes as the organisms pass the detector, giving photon level sensitivity.
GlowTracka is highly flexible in its deployment options, including moorings, profiling (with pumped system) or deployment in towed vehicles.