Module 6: Diversity and Ecosystem Health1.Prior to completing this lab, it is important to understand what protists are, and why they are a model organism for this experiment. Protists are small multicellular animals that provide nutrients for a variety of aquatic organisms. They are used in this experiment because their communities can be replicated over a small period of time. In addition, it is essential to understand the correlation between pH and acid rain. The pH levels are used as an experimental test variable because they can simulate the same affects as acid rain. 2.The objective of this study is to examine the responses of a protist community to varying pH levels: 6.5, 6, 5.5, 5, 4.5, 4, and 3.5. This can be done by observing the five species of protist’s diversity and survivability. 3.The experiment was designed by creating twenty protist cultures five for each of the following species: P.caudatum, Blepharisma sp., Vorticella sp., and Euplotes sp.Spring water and sulfuric/nitric acid solution was used to create the varying pH levels of 6.5, 6, 5.5, 5, 4.5, 4, and 3.5. A wheat seed was added to each community as a source of food.
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- Spring '19