Title

The Effect of Plastics on Daphnia’s Heart Rate, and Mortality Rate

Author(s)

Allison Hall, HHES

School Name

Heathwood Hall Episcopal School

Grade Level

11th Grade

Presentation Topic

Environmental Science

Presentation Type

Non-Mentored

Abstract

The purpose of this project is to determine how plastics affect the heart rate, mortality rate, and reproduction, of Daphnia magna. It was hypothesized that if Daphnia magna are fed plastics then their heart rates will increase, their reproduction will increase and the mortality rate will increase. The plastics were ground up in a coffee grinder and made into solutions using spring water. The mortality and heart rate were measured every day for four days. The average heart rate for low was 196.77 beats per minute. The average for medium was 225.99. The average for high was 226.20. The average for the control was 213.07. The average mortality rate for low was 2.16. The average for medium was 2.58. The average for high was 2.99. The average for control was 3.08. The heart rate data showed that after day three there was a significant difference between the low and high. The high plastic levels had a higher heart rate. Therefore plastics can have an effect on Daphnia magna heart rate over time. The mortality rate was significant on day two between the low and the high. The low plastics had more Daphnia magna alive on day two. Thus implying that the plastics were harmful to the Daphnia. The rest of the days did not have a significant difference. This was most likely due to the short life span of the Daphnia.

Location

Lassiter 222

Start Date

4-14-2018 10:15 AM

Presentation Format

Oral and Written

COinS
 
Apr 14th, 10:15 AM

The Effect of Plastics on Daphnia’s Heart Rate, and Mortality Rate

Lassiter 222

The purpose of this project is to determine how plastics affect the heart rate, mortality rate, and reproduction, of Daphnia magna. It was hypothesized that if Daphnia magna are fed plastics then their heart rates will increase, their reproduction will increase and the mortality rate will increase. The plastics were ground up in a coffee grinder and made into solutions using spring water. The mortality and heart rate were measured every day for four days. The average heart rate for low was 196.77 beats per minute. The average for medium was 225.99. The average for high was 226.20. The average for the control was 213.07. The average mortality rate for low was 2.16. The average for medium was 2.58. The average for high was 2.99. The average for control was 3.08. The heart rate data showed that after day three there was a significant difference between the low and high. The high plastic levels had a higher heart rate. Therefore plastics can have an effect on Daphnia magna heart rate over time. The mortality rate was significant on day two between the low and the high. The low plastics had more Daphnia magna alive on day two. Thus implying that the plastics were harmful to the Daphnia. The rest of the days did not have a significant difference. This was most likely due to the short life span of the Daphnia.