PCB 3043 Ecology: Test Example 2

This test has two sections: first a series of example questions in a non-interactive format, and then a short set of multiple choice questions with an interactive interface.

Fill in the Blanks (one point for each blank):

1. Inorganic phosphate [BLANK] to the surface of iron oxyhydroxide and calcium carbonate particles.

2. Since the concentration of N2 in the atmosphere is relatively constant, it is apparent that the production of N2 via [BLANK] must balance losses via [BLANK].

3. For a population at equilibrium with respect to population size (dN/dt = 0), r = [BLANK].

4. In the absence of births, immigration and emmigration, the rate of population growth is equal to the per capita [BLANK] rate times the size of the population.

Define each of the following in ONE COMPLETE SENTENCE

1. Cultural eutrophication

2. Fitness

3. Resource

4. Intrinsic rate of population growth

5. Leibig's law of the minimum

6. Life history strategy

Short answer questions. Answer the following questions in 3-5 complete sentences, and clear diagrams where appropriate, in the space provided. Show some thought!

1. Who was Malthus?.

2. An ecologist wishes to estimate the size of the population of aligators at Anhinga Trail in the Everglades. She captures 13 individuals, marks them all with waterproof paint, and releases them. Three weeks later, she traps 18 gators in the same location, 6 of which were marked. If the SE of the estimate = square root of {M2(n+1)(n- R)}/{(R+1)2(R+2)}, between what two numbers can we be 95% sure the real population lies between? Is the Lincoln Index an appropriate estimation method in this case? What assumptions must be met?

3. A population of mice grows from 100 to 200 in 4 months. If the population were allowed to grow unchecked, how many mice would there be in 1 year? 5 years?

4. How did the limestones that formed south Florida form?

5. Describe the three theoretical type of survivorship curves, and give examples of populations that illustrate each curve. What is the shape of the survovorship curve for most populations?