Laboratory 4 - and changes Indicators species are used to...

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Laboratory 4: Assessing Water Quality Ph Species 1 Species 2 Species 3 2.8 0 0 0 3.1 0 0 0 3.4 0 0 0 3.7 0 0 0 4.0 0 0 0 4.3 0 0 0 4.6 0 0 0 4.9 0 8 0 5.2 0 19 7 5.5 0 20 11 5.8 0 20 16 6.1 0 20 20 6.4 0 20 20 6.7 7 20 20 7.0 20 20 20 1.What are the names of the species used in this experiment? Crayfish, Leech, Stonefly Nymph Which of these species was the most tolerant of increased acidity in the aquarium? Leech Which species was the least tolerant? Crayfish 2. Describe how acid precipitation affects ecosystems. Acid precipitation can be harmful to an environment that is more neutral or basic. Increased acid precipitation decreases pH level, and thus some organisms can no longer survive in their environment because they are intolerant of the acidity. 3.What is an indicator species? How are indicator species used to assess pollution levels in the environment? An indicator species is a species, which can be used to identify environmental shift
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Unformatted text preview: and changes. Indicators species are used to assess pollution levels in the environment by measuring their lack of, stability or increase in growth, development, reproduction and behavior. 4. Suppose you are an ecologist studying the effects of acid precipitation on plant life. Describe an experiment you would perform in order to determine which plant species would be a useful indicator species for acid rain pollution. I would put 30 plants of the same kind species in a controlled environment and divide them into groups of 3. Each group would get a different level of acid pH, and I would measure their growth. I would compare all these to regular tap water, or neutral water. 5. How do the data represented on the Population Bar Graph compare to the data represented in the line graph titled Populations of Aquatic Invertebrates at Various pH Levels? I could not find the answer...
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