Alexander Bailess

PhD Researcher  ·  Oregon State University

About

I'm a researcher and teacher studying how energy propagates in the marine environment. I received a BS in Biology and Earth Science from UC Santa Cruz, where I worked with the McCarthy and Kudela labs on stable isotopes and phytoplankton. After graduation I continued studying phytoplankton in the Cloern lab at the United States Geological Survey (USGS) and the Chavez lab at the Monterey Bay Aquarium Research Institute (MBARI) — where I got hooked on optics and ocean tech. Now at Oregon State, I research phytoplankton-light interactions, instrument development, and kelp forest ecology. You can see a summary of some current projects below. If I'm not in the lab you'll probably find me swimming, diving, or lost in the woods.

Alexander Bailess in scuba gear

Current Research

My work sits at the intersection of ocean optics, marine ecology, and instrument development. I use light as a tool to understand ocean ecosystems — from the tiniest plankton to the food webs they sustain.

Hyperspectral Fingerprints for Harmful Algal Blooms

Harmful Algal Blooms (HABs) are aggregations of algae that pose a risk to human health and/or aquatic ecosystems. Toxigenic species, like Pseudo-nitzschia, are capable of shutting down commercial fisheries along the entire US West Coast and have caused the mass mortalities and strandings of marine mammals and seabirds. We are investigating hyperspectral ocean color "fingerprints" to identify these harmful algal bloom species remotely, using satellites or drones. This may provide West Coast fisheries and aquaculture an early warning system before toxins shut down harvests.

Phytoplankton cultures Inline system

OCEAN-EYE: Open-Source Optical Sensors

Commercial oceanographic instruments are expensive, delicate, and proprietary — which often makes quality data inaccessible for the communities that need it most. OCEAN-EYE (Ocean & Coastal Environments Autonomous Network for Ecosystem Yield Evaluation) is a suite of open-source, low-cost optical sensors designed for citizen science and environmental monitoring. We build them, deploy them, and share everything: hardware, code, and data.

Alexander Bailess on Tara with OCEAN-EYE sensor Working on OCEAN-EYE sensors 3D-printed open-source sensor

Particle Size Distribution in Coastal Ecosystems

The size of organisms (particles) in the ocean is a first-order measure of how efficiently energy moves through the food web and how much carbon is exported to depth. We're measuring particle size distributions — from plankton to fish — across nearshore kelp forests to understand trophic transfer efficiency and quantify sustainable harvests for the communities that depend on these ecosystems. We monitor these systems with a suite of novel imaging technologies and classification algorithms to derive the abundance, size, and community composition of these coastal ecosystems.

Deploying mini ISSIS — In Situ Ichthyoplankton Imaging System IFCB cell images Kelp forest survey Diving with friends

HyperNAV

HyperNAV is a cutting-edge satellite vicarious calibration system used to validate products from NASA's latest satellite mission, PACE. The system consists of two hyperspectral radiometers (0.4 nm spectral sampling frequency) attached to an autonomous profiling float for daily satellite matchups. I have been fortunate to work with Dr. Andrew Barnard deploying, calibrating, and characterizing these instruments at Oregon State University in collaboration with labs at the University of Maine and the Scripps Institution of Oceanography. HyperNAV data can be found here.

Alexander Bailess with HyperNAV HyperNAV at NELHA Running FOV tests on HyperNAV

Publications

Preprint — bioRxiv
Bailess, A., Baetge, N., Barnard, A., Tufillaro, N., Behrenfeld, M., Bill, B., Kudela, R., Graff, J., Kavanaugh, M.
bioRxiv 2026.02.24.707776 February 2026
MS Thesis
Bailess, Alexander
Oregon State University — CEOAS May 2025
NOAA Technical Report
Ondrusek, M.; Wei, J.; Wang, M.; Stengel, E.; Kovach, C.; Gilerson, A.; Goes, J.I.; Hu, C.; Ladner, S.; Tufillaro, N.; Voss, K.J.; Bailess, A.; Barnard, A.; Blocker, R.; Bunson, S.; Cannizzaro, J.; English, D.; Gomes, H.R.; Herrera, E.; Jordan, J.; Kavanaugh, M.; Malinowski, M.; Moretto, W.; Sullivan, S.
NOAA Technical Report NESDIS 163 2025
NOAA Technical Report
Ondrusek, M.; Wei, J.; Wang, M.; Stengel, E.; Kovach, C.; Gilerson, A.; Herrera, E.; Malinowski, M.; Goes, J.I.; Wu, J.; Gomes, H.R.; Hu, C.; Cannizzaro, J.; English, D.; Shi, J.; Yao, Y.; Ladner, S.; Mannino, A.; Chaves, J.E.; Farr, D.P.; Freeman, S.A.; Smith, H.D.; Tufillaro, N.; Bailess, A.; Belmonte, A.; Barnard, A.; Tan, J.; Frouin, R.
NOAA Technical Report NESDIS 160 2024
Journal Article
Vokhshoori, N., Tipple, B., Bailess, A., McCarthy, M.D.
Palaeogeography, Palaeoclimatology, Palaeoecology, 606, 111249 2022

Conference Presentations

HyperNav: A Novel Use of NAVIS Autonomous Profiling Floats for System Vicarious Calibration of the NASA PACE Ocean Colour Instrument
Euro-Argo Science Meeting 2025
Banks, A., Barnard, A., Haëntjens, N., Boss, E., Frouin, R., Tan, J., Spyridakis, N., Bailess, A., Chamberlain, P., Mazloff, M.
System Vicarious Calibration of the PACE Ocean Color Instrument
European Geosciences Union 2025
Frouin, R., Tan, J., Bailess, A., Barnard, A., Boss, E., Haëntjens, N., Banks, A., Chamberlain, P., Mazloff, M.
Ocean Optics — October 2024, Spain
Bailess, A., Baetge, N., Bill, B., Barnard, A., Behrenfeld, M., Graff, J., George, K., Tufillaro, N., Kavanaugh, M.
Initial Matchups from the HyperNAV Vicarious Calibration Network and the PACE Ocean Color Instrument
Ocean Optics — October 2024, Spain
Barnard, A., Boss, E., Frouin, R., Haëntjens, N., Tan, J., Craig, S., Sirk, E., Bailess, A., Chamberlain, P.
Phytoplankton 'Fingerprints'
State of the Coast 2024 — Seaside, OR · Oregon Sea Grant
Bailess, A., Baetge, N., Bill, B., Barnard, A., Behrenfeld, M., Graff, J., George, K., Tufillaro, N., Kavanaugh, M.
Light in the Sea: Investigating Oregon's Nearshore Plankton through Ocean Color
Hatfield Awards Ceremony 2024
Bailess, A., Kavanaugh, M.
Combining Hyperspectral and eDNA Measurements: Looking for Relations between Biodiversity at Multiple Trophic Levels and Remote Sensing
American Geophysical Union 2023
Chavez, F., Messié, M., Pitz, K., Baker, J., Bailess, A.
A Fresh Take on Phyto: Hydrologic Variability's Effect on Phytoplankton Bloom Dynamics
Ocean Sciences Meeting 2022
Bailess, A., Eddy, T., Nejad, E., Fritsch, J., Schraga, T.
Where are the Blooms? — Estuaries as Hot-spots of Microbial Carbon and Nitrogen Cycling
Ocean Sciences Meeting 2022
Eddy, T., Bailess, A., Nejad, E., Schraga, T.

Research Cruises

Tara Coral — S/V Tara
Calibration and validation of satellite products and testing of new instrumentation, 1.5 months — transatlantic NASA PACE mission
2025
VIIRS Cal/Val — R/V Ruben Lasker
Spectral data collection on red tides and satellite product validation, 14 days
2025
VIIRS Cal/Val — R/V Nancy Foster
HyperPro, open-source radiometers, and Inline system deployment, 12 days — satellite product calibration/validation
2024
Northern California Current Survey — R/V Shimada
Dilution experiments, Inline system operations, 18 days — monitoring nearshore commercial fish species' recruitment success
2023
Kelp Forest Ecology — R/V Pugettia
SCUBA surveys of nearshore Oregon kelp forests; stereo video, fish/kelp/invert transects, eDNA — day trips, bimonthly
2023 – Present
HyperNAV — F/V Graphic Slayer
HyperNAV deployments, day trips, several per year — satellite product calibration/validation
2023 – Present
VIIRS Cal/Val — R/V Shimada
HyperNAV and HyperPro deployments, 10 days — satellite product calibration/validation
2023
VIIRS Cal/Val — R/V Oscar Elton Sette
HyperNAV and HyperPro deployments, 11 days — satellite product calibration/validation
2022
Monterey Bay Time Series — R/V Rachel Carson
Apparent optical properties, eDNA, monthly cruises — Monterey Bay Long Term Ecological Time Series
2021 – 2022
San Francisco Bay USGS Time Series — R/V Peterson
CTD, nutrient, chlorophyll, SPM; 1–3 monthly cruises — San Francisco Bay Long Term Ecological Time Series
2020 – 2022

Contact

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