The Effect of pH Levels on Density of Algae

Cassidi Gooch, Chelsea Fortenberry, Aubrea Martin, Dalton Moran, Mohammed Alajmi


Abstract: We experimented on the pH levels of an aquatic environment and whether or not it directly impacted the density of algae. If the change of pH levels causes a decrease in algae density then the water quality will improve, and therefore be more usable, efficient, etc. The aquatic environment that we worked with was the inlet region of the Dolese pond, found on NW 50th Street and Portland Avenue. We tested basic, neutral, and acidic pH level effects on algae density. The first trial measured the amount of algae found in the natural aquatic environment with a baseline pH of 6.78, the second trial measured the amount of algae found with vinegar added (3.22 pH), and the third trial measured the amount of algae found with the baking soda added (9.3 pH). We predicted that both acidic and basic conditions will kill most or all of the algae, therefore creating better water quality. Our experiment supported our hypothesis because the decreased and increased pH levels resulted in decreased algae density, thus expanding water purity.

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