New instrument enables remote detection of toxic algae in real time

MOSS LANDING, California Using the Environmental Sample Processor (ESP), the first in a new class of oceanographic research instrumentation, a team of MBARI scientists and engineers detected the onset and development of a harmful algal bloom (HAB).

The ESP was deployed in May as part of an ongoing, multi-institution research effort in the Gulf of Maine aimed at understanding the growth, transport, and decay of toxic blooms which can adversely affect the health of humans and wildlife. The toxic dinoflagellate, Alexandrium fundyense, was detected during the experiment at low densities of approximately 100 cells per liter of seawater.

The ESP was developed at the Monterey Bay Aquarium Research Institute (MBARI) and is designed to autonomously collect discrete subsurface water samples and concentrate microorganisms contained within those samples onto filter disks. The ESP automates application of preservatives as well as DNA and other molecular probes to the collected samples to enable identification and quantification of particular species captured.

In addition to archiving discrete samples for microscopy and nucleic acid and toxin analyses, the instrument also transmits results of probe assays in real-time to a remote location for data processing and interpretation.

This capability provides an entirely new means of remotely detecting microorganisms in the environment, enabling water quality assessments in the absence of ship-based sample collection and time-consuming laboratory analysis.

The ESP is the result of four years of teamwork between MBARI scientists and engineers, under the leadership of Chris Scholin and Gene Massion. Although the current instrument is targeted at HAB research and issues related to the health of humans and marine wildlife, it is capable of emulating a wide variety of water quality measurements.

"The exciting results from the Gulf of Maine experiment are the culmination of four years of effort at MBARI in developing t

Contact: Gail Piper de Mesa
Monterey Bay Aquarium Research Institute

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