Nutrient Pollution

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Lab Exercise 19: Nutrient Pollution

Student’s Name: _______________________________________ Date: __________________________

1. Starting Up Exercise (5 pts.)
For each of the species in the simulation, list the type of organism it is (phytoplankton, zooplankton, and primary producer, primary consumer, or secondary consumer):

Green algae ___Phytoplankton____________________________________________________________________

Cyanobacteria _Secondary Consumer______________________________________________________________________

Bosmina _____zoo plankton__________________________________________________________________

Daphnia ____Primary Producer___________________________________________________________________

Trout fish ___Primary Consumer____________________________________________________________________

2. Changing concentration of phosphorous, a common limiting nutrient (15 pts.)
Data Table for Phosphorus Input Experiment (3 pts.)
Phosphorous input Green Algae
Population Size Dissolved O2 (mg/L)
1x 191 7.3
2x 334 4.2
3x 463 1.0

Draw a line graph of your green algae population size data (use the Drawing tool or Insert, Shapes) in your word processing program) to show how green algae relate to phosphorus input levels. (2 pts.)
-

a. Explain if the relationship in the above graph indicates whether phosphorus was a limiting nutrient for green algae. (2 pts.)

You also have recorded date from the oxygen meter at the bottom of the lake. Draw a line graph showing the relationship of phosphorous input levels to dissolved oxygen in the water.(2 pts.)

b. Explain the relationship between phosphorous and dissolved oxygen concentrations in the graph above. (2 pts.)

c. Based on your two…...

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