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Not-So-Freshwater

CSEF · 2023 Toxicology Third Award

Haque Sarina · 7

Overview

This experiment seeks to determine whether or not freshwater acidification impacts the heart rate of Daphnia Magna. Not many studies have looked into the impact of freshwater acidification, so this will give some insight into how these organisms may be affected. My hypothesis is that decreasing the pH will increase the heart rate, as this has been shown in other studies related to acidification. To test this, Daphnia Magna were placed into 5 different containers, with different pH levels (6, 6.5, 7, 7.5, 8), and their heart rates were checked every 24 hours for four days. After completing the experiment, it was determined that lowering the pH does increase the heart rate of Daphnia Magna. After the fourth day, the average heart rate for each pH level was 315.75 (pH of 6), 288 (pH of 6.5), 268.5 (pH of 7), 269 (pH of 7.5), and 265 (pH of 8). No trend was observed in the data from day 1 to day 4 within each pH value. As a result, my hypothesis was supported, as the findings in this data match my initial prediction.

Source coverage

This record comes from a published award list, not a complete project archive. Its abstract comes from CSEF's public project showcase as archived by the Internet Archive before judging (https://web.archive.org/web/20230401224130/https://ca-csef.zfairs.com/showcase/ShowcaseInfo?f=838e60b7-ea75-46e8-865c-fde4864244b3); the version presented may differ.

Awards (1)

Competition history

  • CSEF 2023 Toxicology · Entry J2104

Resources

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