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Michael W. Guidry, PhD

Assistant Specialist, Department of Oceanography


  • PhD Oceanography, University of Hawaii (2002)
  • BS Marine Science, University of South Carolina (1994)

Humankind's Biogeochemical Experiment: Ocean Acidification and "Coral Reef" Dissolution

Ocean acidification (the process by which the surface waters of the ocean are becoming more acidic due to absorbing atmospheric carbon dioxide generated, in part, by the burning of fossil fuels) has serious implications in terms of its effects on marine ecosystems, especially for those organisms that generate shells or skeletons out of the calcium carbonate. As a consequence of ocean acidification, the ability and rate at which these organisms can create calcium carbonate shells and skeletons will decrease, the physical strength of their skeletons could weaken (a condition similar to osteoporosis), and the organisms could become less resistant and more vulnerable to environmental stress. Our research investigates how ocean acidification is impacting the calcium carbonate bearing organisms found in Kaneohe Bay and will help to determine impacts of ocean acidification on the overall marine ecosystem of Kāne‘ohe Bay and other tropical marine ecosystems.

Contact Information


Marine Sciences Building, R204  1000 Pope Road                    Honolulu, HI 96822