Section 4: Watershed Experiment Nutrient Cydling NOTES QUESTIONS Predicting Fore

Question

Section 4: Watershed Experiment Nutrient Cydling NOTES QUESTIONS Predicting Forest Change Impact on Lake Water In Section 1, you discovered there is more nitrogen in the water of L Cair compared to Lac Bleu. The nitrification of the lake water led to a significant shilt in the lake community, including the disappearance of fish. Your challenge is to answer the following question: what ikely happened to Forêt Verte that could cause this change in the lake? Using tools provided, you can change the forest's conditions, creating experimental "treatments", which you test by running the simulation and measuring impacts on lake biota To begin, make sure that you are looking at the FOREST view Q4.1. If you had to pick just one factor of the two below, which experimental treatment do you think is going to cause the greatest change in lake chemistry? Clearcuting Acid rain Rainfall pH O Low 2.5) Nomal (5.6)

Explanation / Answer

Ans. By far the necessary reason for the change in lake chemistry is due to clear cutting. Due to clear cutting the accumulation of nutrients would take place in lake water. Nutrients and phosphorous concentration would increase in the water collecting body due to cutting of trees. Due to cutting of trees water uptake and nutrients are inhibited resulting in the change in the lake chemistry. Due to clear cutting the average runoff increases resulting in washoff from the surface of the soil resulting in accumulation in the lakes and change in chemistry.

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