Environmental Sample Processor

Environmental Sample Processor. It is an autonomous, robotic instrument system designed to collect and analyze water samples in marine or freshwater environments in real-time. Developed primarily by researchers at the Monterey Bay Aquarium Research Institute (MBARI), the device enables the detection of specific microorganisms, toxins, and genetic material without requiring physical sample retrieval. This technology represents a significant advancement in oceanography and environmental monitoring, allowing for rapid response to events like harmful algal blooms.

Overview

The system functions as a fully automated, submersible laboratory that can be deployed on moored buoys, autonomous underwater vehicles, or at seafloor observatories. Its core purpose is to perform molecular analyses, such as quantitative polymerase chain reaction (qPCR) and DNA microarray assays, on-site. By transmitting results via satellite communication or acoustic modem, it provides near real-time data to scientists on shore. This capability is crucial for studying dynamic biological processes in aquatic systems, from tracking phytoplankton communities to monitoring for pathogens like those causing vibriosis.

Design and operation

The instrument's design incorporates a fluidic system for sample collection, filtration, and processing, alongside reagent storage and temperature-controlled chambers for biochemical reactions. A typical unit includes a syringe pump, filter membranes, and a luminometer or fluorometer for detecting assay signals. Operational sequences are pre-programmed, allowing the device to autonomously intake a water sample, concentrate microorganisms, lyse cells to release nucleic acids, and then conduct specific genetic probes. Key technological partnerships have involved institutions like the National Oceanic and Atmospheric Administration and the University of Washington.

Applications

Primary applications focus on detecting and quantifying harmful species, such as the dinoflagellate *Alexandrium* that produces saxitoxin, and the diatom *Pseudo-nitzschia* responsible for domoic acid poisoning. It has been deployed during research cruises like those of the Ocean Exploration Trust and within observatory networks such as the Ocean Observatories Initiative. Beyond ecology, it supports public health efforts by monitoring for fecal indicator bacteria near coastal communities and aids fisheries management by providing early warning of toxic blooms that could impact shellfish aquaculture or species like salmon.

Development and deployment

Initial development was led by Chris Scholin and colleagues at Monterey Bay Aquarium Research Institute, with funding from the Gordon and Betty Moore Foundation and the National Science Foundation. Early prototypes were tested in the late 1990s, with the first generation deployed in Monterey Bay. Subsequent models, including the smaller third-generation "ESPniagara," have been used in diverse locations from the Gulf of Maine to Lake Erie, and even in Antarctica under the National Antarctic Program. Notable deployments include integration onto the AUV Dorado and long-term moorings as part of the NOAA Integrated Ocean Observing System.

Significance and impact

The technology has revolutionized the field of environmental microbiology by providing persistent, high-frequency data previously unattainable with traditional ship-based sampling. It has directly informed management decisions by agencies like the Washington State Department of Health regarding shellfish bed closures. The underlying concept has inspired similar platforms for atmospheric science and planetary exploration, including instruments considered for missions to Europa. Its development underscores a major trend toward autonomous, networked sensing within the broader Earth system science community.

Category:Environmental monitoring Category:Oceanographic instrumentation Category:Robotics