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GROUP FOUR DEVON PROJECT

GROUP FOUR DEVON PROJECT. Group 6: Peya Brock, Paige Gilligan, Robert Kingsley and Yuki Shindo. Aim. To find the correlation between temperature, oxygen levels and number of living organisms in the stream. Hypothesis.

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GROUP FOUR DEVON PROJECT

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  1. GROUP FOUR DEVON PROJECT Group 6: Peya Brock, Paige Gilligan, Robert Kingsley and Yuki Shindo

  2. Aim • To find the correlation between temperature, oxygen levels and number of living organisms in the stream.

  3. Hypothesis • The higher the temperature and oxygen levels, the more living organisms there will be in the stream due to organisms needing oxygen tend to gather where oxygen is denser. • Physics: Where the gradient of the slope is high, due to gravity the velocity of water would be faster thus the temperature would be warmer due to more friction. • Biology and ESS: How abiotic factors, such as temperature and oxygen, effect the biotic factors in stream.

  4. Method • Starting up stream we measured the temperature, oxygen levels and kick sampling for the number of living organisms. • We collected three samples for the oxygen levels per site so that an average could be taken. • At each site we picked a point which was 3cm deep.

  5. Variables • Controlled: Depth Number of kicks • Independent: Sites • Dependent Temperature Dissolved oxygen level Number of organisms

  6. Data presentation Temperature at each site *Distance between each site is inconsistent.

  7. Dissolved oxygen at each site *Distance between each site is inconsistent.

  8. Number of organisms at each site *Distance between each site is inconsistent.

  9. Dissolved oxygen against Number of organisms Since temperature remained constant, it would not have an effect on the number of organisms.

  10. Site One

  11. Site Two

  12. Site Three

  13. Site Four

  14. Site Five

  15. Evaluation • As we moved down stream, the sites progressively became more and more disturbed. Organisms had already become kicked up and therefore made our data collection harder and less accurate. • The temperature also did not change drastically and this affected the overall outcome of the experiment.

  16. Conclusion • We were not able to prove or disprove our hypothesis, because of the disturbance of the sites. • This experiment did not prove the physics point of view because there was no temperature difference. • However from our data we were able to conclude that oxygen levels decreased as we moved downstream because the gradient of the river was steeper around site 1 and that makes the water mix with air, thus having more oxygen.

  17. Group 6

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