(full paper is archived in the Miller Library)
Title: Determination of major controlling factors of dissolved oxygen concentrations in tidepools
Student Author(s): Moore, Steven M.
Faculty Advisor(s): Denny, Mark W.
Location: Final Papers Biology 175H
Date: June 1989
Keywords: nearshore fishes
Abstract: Rates of oxygen depletion per biomass were determined separately for four groups of organisms: fish, invertebrates, healthy algae, and necrotic algae. Rates of oxygen addition per biomass were determined for healthy algae at varying degrees of solar irradiance. These rates were incorporated into a computer program and used to predict oxygen levels in tidepools with known amounts of biomass of the above groups of organisms. The model was calibrated using input values from one pool, and tested using values from two other pools. The model predicted oxygen levels reasonably close to actual field values for night deletion and morning addition, but predicted a continuous rise in tidepool oxygen during the afternoon, when actual tidepool oxygen conentrations tend to level off. When manipulated over a midnight to noon time course, the model highlighted the importance of algae to both addition and depletion of oxygen in tidepools. Other factors that showed significant effects on ambient oxygen levels included invertebrate population, day length, and local topography.