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Aquatic Respiration
Chemistry of Oxygen Solubility
Data Interpretation
Diel Temperature Variation in Lakes
Effect of pH
Effect of Photosynthesis and Respiration on Aquatic Chemistry
Fish Stocking Decisions
Heat Budgets of Lakes
Increased Conductivity
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  Photosynthesis and Respiration Worksheet

Name(s): ____________________________________________________

Date: ___________________

Data Collection
1. What occurred in each microcosm?






Data Management and Analysis
2. Describe the results of your microcosm work.






Interpretation of Results
3. Were your results consistent with the equations for photosynthesis and respiration? Why or why not? (Refer to the reading: Introduction to Cellular Respiration and Photosynthesis)






4. What trends did you observe in the WOW data you collected in surface water over the course of a complete day?






5. Hypothesize why it is common for oxygen to be abundant near the surface and nearly-depleted near the bottom of the lakes in summer. Did the lake you selected show this pattern?






6. Describe the relationships that exist between oxygen and pH levels in the profile you graphed.






7. Were the trends observed in WOW data consistent with the equations for photosynthesis and respiration?






8. Using the "Understanding Lake Ecology" section or a text, diagram the carbon cycle in the lake you sampled using WOW data. Be sure to include primary producers, primary consumers, secondary consumers, tertiary consumers, and decomposers.


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date last updated: Tuesday March 09 2004