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George Waldbusser

George Waldbusser photo
Assistant Professor

Discipline: Ocean Ecology and Biogeochemistry
Office: Burt 200
Phone: 541-737-8964
Fax: 541-737-2064
Email: waldbuss@coas.oregonstate.edu

Research Interests

Benthic Ecology & Sediment Biogeochemistry: The role of organisms in modifying physical and biogeochemical processes in sediments, Species interactions in sediments, Coastal and estuarine acidification effects on bivalves, The importance of benthic habitats in biogeochemical cycling, Structure and function of sedimentary habitats, Tidal flat ecology.

"Just Pearly" by Kathryn Boyd-Batstone

Webinar on Larval Bivalve Responses to Acidification

Current Research

Funded Research Projects

Utilizing U/Ca Ratios to Determine Best Management Practices for Shell Planting and Oyster Culture to Mitigate Ocean Acidification Impacts. OR Sea Grant (2016-2018). with A. Shiel, A Kent. Co-PI.

Interactions between ocean acidification and eutrophication in estuaries: Modeling opportunities and limitations for shellfish restoration. NOAA-OA (2015-2018). with J. Testa (lead PI), M. Kemp, J. Cornwell, M. Li, WJ Cai. Co-PI 

Adapting Aquaculture to Changing Water Chemistry in the Pacific Northwest USDA-WRAC (2015-2019), with B. Hales, B. Haley, C. Langdon, A. Barton, B. Eudeline, and B. Warren. Lead PI.

Improving juvenile oyster survival through adaptation and screening of ocean acidification impacts (2014-2016) NOAA-Sea Grant Aquaculture, Lead PI

Sea Grass as Possible Ocean Acidification Refugia for Shellfish in a High CO2 World. (2014-2016), with B. Hales. Oregon Sea Grant, Lead PI

Resistance of Pacific Oyster Larvae and Juveniles to the Effects of Ocean Acidification. (2014-2016), with C.J. Langdon, E. Myer. Oregon Sea Grant, Co-PI.

Using Spatial Data and Analysis to Understand the Human Impacts of Ocean Acidification. National Socio-Environmental Synthesis Center (SeSync). Participant

Developing realistic metrics of acidification stress for commercially important bivalves in variable habitats. (2012-2015), with B. Hales, and C. Langdon. Oregon Sea Grant. Lead PI

Ocean Acidification Category 1: A mechanistic understanding of the impacts of ocean acidification on the early life stages of marine bivalves. (2010-2015), with B. Hales, C. Langdon, and B. Haley. NSF-CRI/OA #1041267. Lead PI

Macrofaunal community effects on benthic exchange fluxes (2008-2012), with C. Meile, University of Georgia. NSF-OCE # 0751856/1014226. Co-PI

Dissolution mortality of juvenile bivalves in coastal marine deposits (2007-2011), with M.A. Green, St. Joseph’s College of Maine. NSF-OCE #0622999. Co-PI


2008, Ph.D. University of Maryland (Biological Oceanography)
2002, M.Sc. University of Connecticut (Biological Oceanography)
1999, B.Sc. St. John’s University, NY (Environmental Science)



OEAS 540 Biogeochemical Earth. Co-instructor with Dr. Fred Prahl (winter term 2010-2014) with Laurie Juranek (winter 2015-current)


OC 333 Oceans, Coasts, and People. Co-instructor with Dr. Flaxen Conway (spring term 2013)
OC 505, “Ocean Acidification and Bivalves,” Winter 2010

BIOL 380.01, “Topics in Biology: Biostatistics,” Fall 2008, St. Mary’s College of Maryland

Graduate Students

Rebecca Mabardy, M.S. (2011-2013) Marine Resource Management
Elizabeth Brunner, M.S. (2011-2013), Ocean Ecology and Biogeochemistry
Iria Gimenez, Fulbright Scholar, Ph.D. (2011-current), Ocean Ecology and Biogeochemistry
Stephanie Smith, M.S. (2012-current), Marine Resource Management
Steven Pacella, Ph.D. (2014- current), Ocean Ecology and Biogeochemistry
Cameron Allen, Ph.D. OSU Provost Fellow (2014-current), Ocean Ecology and Biogeochemistry

Appointments and Awards

Associate Editor, Limnology and Oceanography: Methods (2012-present)
Member Editorial Board, Journal of Shellfish Research (2012- present)
Pattullo Gradaute Education Award, CEOAS (2014)
MRM Faculty Award, MRM-CEOAS (2014)
Excellence in Reviewing, Journal of Experimental Marine Biology and Ecology (2012)


Brunner, E.L., F.G. Prahl, B. Hales, G.G. Waldbusser (in review) Insights from Stable Isotopes into the Sensitivity of Larval Pacific Oysters to Ocean Acidification. Marine Ecology Progress Series.

Waldbusser, G.G., M.W. Gray, B. Hales, C.J. Langdon, B.A. Haley, I. Gimenez, S. Smith, E.L. Brunner, G. Huthinson (in review) Slow shell building, a trait for resiliency to acute ocean acidification impacts. Limnology and Oceanography.

Hales B., A. Suhrbier, G.G. Waldbusser, R.A. Feely, and J. Newton (in review) The carbonate chemistry of the ‘fattening line’, Willapa Bay, 2011-2014.

Perez, C.A., N.A. Lagos, G.S. Salidas, G.G. Waldbusser, C.A. Vargas (accepted) Riverine discharges impact physiological traits and carbon sources for shell carbonate in the marine intertidal mussel Perumytilus purpuratus Limnology and Oceanography.

Waldbusser, G.G., B. Hales, B.A. Haley (in press) Comment: Calcium carabonate saturation state: on myths and this or that stories. ICES Journal of Marine Science. 

Dornhoffer, T.M., G.G. Waldbusser, C. Meile (2015) A modeling study of lugworm irrigation behavior effects on sediment nitrogen cycling. Marine Ecology Progress Series 534: 121–134

Mabardy, R.A., G.G. Waldbusser, F. Conway, C.S. Olsen (2015) The U.S. West Coast Shellfish Industry’s Perception and Response to Ocean Acidification: The Voice of the Canaries in the Coal Mine. Journal of Shellfish Research 34(2):565-572.

             Media Coverage: Climate Wire, Register-Guard, Corvallis Advocate, Eurasia ReviewRegister-Guard Op-Ed  

Barton, A., G.G. Waldbusser, R.A. Feely, S.B. Weisberg, J. Newton, B. Hales, S. Cudd, B. Eudeline, C.J. Langdon, I. Jefferds, T. King, K. McLaughlin (2015) Impacts of Coastal Acidification on the Pacific Northwest Shellfish Industry and Adaptation Strategies Implemented in Response. Oceanography 28:146–159

Waldbusser, G.G., B. Hales, C.J. Langdon, B.A. Haley, P. Schrader, E.L. Brunner, M.W. Gray, C.A. Miller, I. Gimenez, G.Hutchinson (2015) Ocean acidification has multiple modes of action on bivalve larvae. PLOSOne DOI:10.1371/journal.pone.0128376

J. Ekstrom, L. Suatoni, S. Cooley , L. Pendleton, G.G. Waldbusser, J. Cinner, J.  Ritter, C. Langdon, R. van Hooidonk, D. Gledhill, K. Wellman, M. Beck, L. Brander, D. Rittschof, C. Doherty, P. Edwards, R. Portela (2015) Vulnerability and adaptation of US shellfisheries to ocean acidification. Nature Climate Change 5: 207–214  Interactive Data Map  

             Media Coverage: CBSNews, The Guardian, The Weather Channel, Science, Mother Jones, Sydney Morning Herald,NPR, CS Monitor,    

Waldbusser, G.G. B. Hales, C.J. Langdon, B.A. Haley, P. Schrader, E.L. Brunner, M.W. Gray, C.A. Miller, I. Gimenez (2015) Saturation-state sensitivity of marine bivalve larvae to ocean acidification. Nature Climate Change 5: 273–280

             Media Coverage: Skeptical Science, The Oregonian, Discovery News, Phys Org, Press Release in Espanol, Ensia, OPB Think Out Loud, Southern Fried Science  

Waldbusser, G.G. and J.E. Salisbury (2014) Ocean Acidification in the Coastal Zone from an Organism’s Perspective: Multiple System Parameters, Frequency Domains, and Habitats. Annual Reviews in Marine Science 6: 221-247.

Waldbusser, G.G., E. L. Brunner,B.A. Haley, B. Hales, C. J. Langdon, and F. G. Prahl (2013) A developmental and energetic basis linking larval oyster shell formation to ocean acidification. Geophysical Research Letters 40: 2171-2176.

             Media Coverage: OPB, NBC News, Phys Org, KVAL, Science News, Groks Radio Show Interview (Featured on Science 360 Radio),    Forbes

Waldbusser, G.G., E.N. Powell, and R. Mann (2013) Ecosystem effects of shell aggregations and cycling in coastal waters: An example of Chesapeake Bay oyster reefs. Ecology 94: 895-903. Invited Contribution

             Media Coverage: NY Times, Discovery News, Yahoo NewsTake Part

Green, M., G.G. Waldbusser, L. Hubazc, E. Cathcart, and J. Hall. (2013). Carbonate Mineral Saturation State as the Recruitment Cue for Settling Bivalves in Marine Muds. Estuaries and Coasts 36: 18-27.

Washington State Blue Ribbon Panel on Ocean Acidification, Ocean Acidification: From Knowledge to Action, Washington State’s Strategic Response (2012) https://fortress.wa.gov/ecy/publications/publications/1201015.pdf

            Media Coverage: Nature News, LA Times, Seattle Times, Sightline

Washington State Blue Ribbon Panel on Ocean Acidification, Scientific Summary of Ocean Acidification in Washington State Marine Waters (2012) https://fortress.wa.gov/ecy/publications/publications/1201016.pdf

Barton, A., B. Hales, G.G. Waldbusser, C. Langdon, and R.A. Feely. (2012) The Pacific oyster, Crassostrea gigas, shows negative correlation to naturally elevated carbon dioxide levels: Implications for near-term ocean acidification effects. Limnology and Oceanography 57: 698-710.

           Media Coverage: C-CAN Summary, KBOO

Dornhoffer T., G.G. Waldbusser, C. Meile (2012) The role of burrow patchiness and sediment reactivity on oxygen dynamics. Journal of Experimental Marine Biology and Ecology 412: 81-86.

Waldbusser, G. G., R. A. Steenson, and M. A. Green. (2011). Oyster shell dissolution rates in estuarine waters: Effects of pH and shell legacy. Journal of Shellfish Research 30: 659-669.

           Most Read Article Status in Journal of Shellfish Research (June 2012 to August 2013)

Kelly, R.P., M.M. Foley, W.S. Fisher, R.A. Feely, B.S. Halpern, G.G. Waldbusser, M.R. Caldwell (2011) Mitigating local causes of ocean acidification with existing laws. Science, 332: 1036-1037

          Media Coverage: Gazette-Times, Science Daily

Waldbusser, G.G., E.P. Voigt, H. Bergschneider, M.A. Green, R.I.E. Newell (2011) Long-term trends in Chesapeake Bay pH and effects on biocalcification in the Eastern Oyster Crassostrea virginica. Estuaries and Coasts. 34: 221-231.

          Media Coverage: Baltimore Sun, Science Daily, Washington Post, Maryland NPR,

Waldbusser, G.G., H. Bergschneider, M.A. Green (2010) Size-dependent pH effect on calcification in post-larval hard clam Mercenaria spp. Marine Ecology Progress Series 417:171-182.

Waldbusser, G.G. and R.L. Marinelli (2009) Evidence of infaunal effects on porewater advection and biogeochemistry in permeable sediments: A proposed infaunal functional group framework. Journal of Marine Research 67: 503-532.

Green, M.A., G.G. Waldbusser, S. Reilly, K. Emerson, S. O’Donnell (2009) Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves. Limnology and Oceanography 54: 1037-1047.

Waldbusser, G.G. and R.L. Marinelli (2006) Macrofaunal modification of porewater advection: The role of species function, species interaction, and kinetics. Marine Ecology Progress Series 311: 217-231. Invited Contribution

Marinelli, R.L. and G.G. Waldbusser (2005) Plant-animal-microbe interactions: Closing the ecological loop. In: Interactions between macro- and microorganisms in marine sediments. Eds. E. Kristensen, R.R. Haese and J. E. Kostka. Coastal and Estuarine Studies, Volume 60. American Geophysical Union. pp 233-249.

Waldbusser, G.G., R.L. Marinelli, R.B. Whitlatch, and P.T. Visscher (2004) The effects of infaunal biodiversity on biogeochemistry of coastal marine sediments. Limnology and  Oceanography 49: 1482-1492.

Invited Talks (*supervised student presenter):

Waldbusser, G.G. et al. (2014) Developmental and energetic basis linking larval oyster shell formation to ocean acidification. Northeast Coastal Acidification Webinar Series.

Waldbusser, G.G. et al. (2013) Ocean acidification bottlenecks and habitat feedbacks in bivalve population dynamics. National Institute of Water and Atmosphere. Wellington, New Zealand

Waldbusser, G.G. et al. (2013) Coastal zone ocean acidification: What matters to oyster larvae and why. Future proofing New Zealand’s shellfish aquaculture: Monitoring and adaptation to ocean acidification. Nelson, New Zealand

Waldbusser, G.G. and M.A. Green (2013) Feedbacks among shell production, dissolution, larval settlement, and ocean acidification. Future proofing New Zealand’s shellfish aquaculture: Monitoring and adaptation to ocean acidification. Nelson, New Zealand

Waldbusser, G.G. (2013) ¿Qué pasa con las ostras, Oregon y la acidificación del mar? Meeting on the Impacts of Climate Climate Change on Aquaculture. Puerto Montt, Chile.

              Media coverage Hub Sustentabilidad , El Mercurio, Vision Acuicola

Waldbusser, G.G. et al. (2013) Different developmental responses of bivalve larvae to PCO2, pH, and saturation state. Coastal and Estuarine Research Federation (CERF) Annual Meeting. San Diego, CA.

*Brunner, E.L. et al. (2013) Carbon and nitrogen stable isotope dynamics of Crassostrea gigas larvae at Whiskey Creek Shellfish Hatchery. Coastal and Estuarine Research Federation (CERF) Annual Meeting. San Diego, CA.

*Gimenez, I., G. Waldbusser, B. Hales, C. Langdon, and R. Mabardy (2013) Physiological Impacts of Short-Time Variable Acidification Stress on Pacific Oyster (Crassostrea Gigas) Larvae- A Proxy Measurement and a Conceptual Framework. Coastal and Estuarine Research Federation (CERF) Annual Meeting. San Diego, CA.

*Gimenez, I., G. Waldbusser, B. Hales, C. Langdon, and R. Mabardy (2013) Stress in a changing environment: towards the development of a conceptual framework for realistic metrics of ocean acidification stress on bivalve larvae. Aquaculture, International Triennial Meeting of World Aquaculture Society, National Shellfisheries Association and American Fisheries Society, Fish Culture Section. Nashville, TN.

Waldbusser, G.G. (2013) Ocean Acidification Effects on Shellfish Production: From Hatchery Failures to Actionable Science. Economies of a Changing Ocean, Consortium for Ocean Leadership, Washington D.C.

Waldbusser, G.G., B. Hales, C.J.  Langdon, B.A. Haley, H. Bergschneider, P. Schrader, M. Gray, E.L. Brunner, I. Gimenez, R. Mabardy, C. Miller, V. Klein (2013) On the importance of understanding the response of bivalve larvae to different carbonate system parameters. National Shellfisheries Meeting, Nashville, TN.

Waldbusser, G.G. (2012) The Pacific Northwest oyster seed shortage and ocean acidification. Oregon Association of Environmental Professionals. Portland OR.

*E.L. Brunner, J. Vance, B. Hales, B. Haley, F. Prahl, G.G. Waldbusser (2012) A mechanism for the sensitivity of larval oyster calcification to ambient seawater carbonate chemistry. National Shellfisheries Meeting, Seattle, WA.

Waldbusser, G.G. (2011) Multiple causes of acidification stress on larval bivalves in coastal and estuarine ecosystems. California Current Acidification Network meeting, Palo Altos, CA.

Waldbusser, G.G. (2011) Opportunities for mitigating coastal acidification impacts: Lessons from larval oysters and juvenile clams. Bodega Bay Marine Laboratory, Science Seminar Series. Bodega Bay, CA.

Waldbusser, G.G. (2011) Ocean acidification impacts on estuarine bivalves: Linking life history, ecology, and biogeochemistry. Ecology and Evolutionary Biology Seminar Series, Oregon State University.

Waldbusser, G.G. (2011) Shellfish on acid: A story of rock, water, and shell. Oregon Coast Aquatic and Marine Science Partnership Colloquia, Newport, OR.

Waldbusser, G.G. and M.A. Green (2011) Juvenile Marine Bivalves within Corrosive Sediments: How Do (Or Don't) They Do It? American Fisheries Society Meeting, Seattle, WA.

Waldbusser, G.G., B. Hales, C. Langdon, and B. Haley (2011) Determining underlying physiological responses of bivalves to ocean acidification with unique carbonate chemistry manipulations. Pacific Shellfish Growers Association Meeting, Salem, OR.

Waldbusser, G.G. (2011) The Causes of Acidification in Chesapeake Bay and Consequences to Oyster Shell Growth and Dissolution. National Shellfisheries Association Meeting, Baltimore, MD.

Waldbusser, G.G. and M.A. Green (2010) Acidification impacts on the survival, growth, and behavior of the hard clam Mercenaria mercenaria: A case study for other sediment dwelling clams. Pacific Coast Shellfish Growers Association, Tacoma, WA.

Waldbusser, G.G. (2010) Crassostrea spp. response to acidification. Puget Sound Acidification Workshop, Seattle, WA.

Waldbusser, G.G. (2010) Coastal acidification: Causes and consequences to bivalves. Hatfield Marine Science Center seminar series.

Meile, C., T. Dornhoffer and G.G. Waldbusser (2010) Do spatial burrow patterns accentuate benthic exchange fluxes? A combined modeling and laboratory study. Ocean Sciences Meeting, Portland,OR.

Waldbusser, G.G. (2009) Acidification of coastal and estuarine ecosystems and potential effects on bivalves. National Academies of Science for the National Research Council Committee on Ocean Acidification.

Waldbusser, G.G., M.A. Green, and H. Bergschneider (2009) Size dependent susceptibility of juvenile Mercenaria mercenaria mortality and shell growth to ocean acidification. National Shellfisheries Association Meeting, Savannah, GA.

Waldbusser, G.G. (2009) Ecological and biogeochemical interactions in sediment habitats: Mechanisms and dynamics. Oregon State University, Corvallis, OR.

Green, M.A., G.G. Waldbusser, S. Reilly, and K. Emerson (2008) Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves. National Shellfisheries Association Meeting, Providence, RI.

Waldbusser, G.G. (2008) Infaunal modification of physical and biogeochemical processes in permeable sediments: The role of species attributes and functional groups. Benthic Ecology Meeting, Providence, RI.

Waldbusser, G.G. (2007) Ecological consequences of animal-sediment interactions on transport and reaction processes in near-shore sediments. UMCES, Horn Point Laboratory, MD.

Waldbusser, G.G. (2007) Animal-Sediment interactions in shallow nearshore habitats: Linking species and ecosystems. University of North Carolina, Institute of Marine Sciences, NC.

Waldbusser, G.G. and K. Mueller (2007) I participated in the Snowbird Charrette and all I got was . . . : Student perspectives. AAAS Annual Meeting, San Francisco, CA.

Waldbusser, G.G. (2006) Bioturbation in nearshore permeable sediments: At the crossroads of oceanography and ecology. Marine and Estuarine Environmental Science Student Colloquium, UMCES Appalachian Laboratory, MD.

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