Paper published on our open source project, Open Wave Height Logger

Typically, measuring ocean wave conditions can require some fairly expensive equipment, or relies on distant wave buoys or computer models that may not give the best picture of your local field site. We designed the Open Wave Height Logger to provide researchers with a low-cost and long-duration pressure sensor data logger that could be used to reconstruct wave heights and sea state. The results of this project are available in our open access paper published in Limnology and Oceanography: Methods.

The electronic circuit board designs are made freely available, as well as the software to run the device, which is derived from the Arduino open source hardware project. The sensor and batteries get housed in a homemade PVC plumbing pipe housing. More information can be found on the project’s Github repository and at http://owhl.org which contains a wealth of information on all of the assembly, programming, and deployment methods we’ve come up with during the course of this project.

An early OWHL prototype after spending 1 month in the Monterey Bay.

Measuring oystercatcher predation on limpets

The Journal of Experimental Biology highlighted our paper on the interaction between limpet temperature stress and susceptibility to oystercatcher predation. The news article is available here: https://jeb.biologists.org/content/223/7/jeb224923

The paper that this work is based on is available here: https://jeb.biologists.org/content/223/7/jeb213595. This work was done in collaboration with Rachel Pound and Professor Jennifer Burnaford at CSU Fullerton as part of Rachel’s M.Sc. project. Felicia King helped with the design of the limpet force transducer that we used to estimate the force exerted by the pecking oystercatcher.

“Squeakers” the black oystercatcher interacting with our limpet force transducer. Photo: Rachel Pound.
The innards of the limpet force transducer. The right end has a 2-axis “joystick” force transducer mounted on top of a 1-axis load cell to give 3 axes of force measurement. The electronics are based on an Arduino Due 32-bit microcontroller and a custom board holding the power supply and amplifiers for the strain gages of the force transducers.

Oyster biosensor project featured on KPBS

Gabriella Kalbach being interviewed while she mounts shell gape sensors on oysters.

Oysters To Serve As Biological Sensors In San Diego Estuaries Рweb version and radio story audio

Luke Miller and masters student Gabriella Kalbach were featured in a radio spot describing our collaborative project with Dr. Sarah Giddings at UCSD/Scripps Institution of Oceanography to measure oyster responses to hypoxia (low oxygen) events in local San Diego Lagoons.

Deploying oyster biosensors in Los Penasquitos Lagoon. The datalogger is housed in the watertight box mounted to the body board. 2019-11-25