The document describes an experiment testing how increased levels of nitrogen, phosphorus, and potassium (NPK) fertilizer affect dissolved oxygen levels in water samples containing filamentous algae. The results showed that higher NPK fertilizer led to lower dissolved oxygen as the algae and plant life consumed more oxygen over time, with detrimental effects on the aquatic environment. Graphs and analysis identified fluctuations in dissolved oxygen levels and outliers in the data.

1. How does the increase of NPK fertilizer affect the levels of dissolved oxygen in different water samples with filamentous algae? Dolf, Murphy, Stephanie, Sophie

2. Description of Experiment

3. Variables/Raw Data Initial Final

4. Graphs/Analysis

5. Increase in NPK  decrease in dissolved oxygen levels Plant life  consuming more and more oxygen Detrimental to environment Amount of algae / water weight Fluctuations in dissolved oxygen levels Outliers Conclusion