Exam 55: Ecosystems and Restoration Ecology

Use the following figure to answer the question. After looking at the results in the figure, what can be concluded about productivity in the experimental ecosystem?

You own 300 acres of patchy temperate forest mixed with grassy meadows. Which one of the following actions would increase the net primary productivity of the area the most?

Which of the following terms encompasses all of the others?

A porcupine eats 3,000 J of plant material. Of this, 2,100 J is indigestible and is eliminated as feces, 800 J are used in cellular respiration, and 100 J are used for growth and reproduction. What is the approximate production efficiency of this animal?

Acid precipitation lowered the pH of soil in a terrestrial ecosystem that supported a diverse community of plants and animals. The decrease in pH eliminated all nitrogen-fixing bacteria populations in the area. Which prediction most accurately reflects the impact this will have on the community?

Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5,000 J of animal material. The owl loses 2,300 J in feces and owl pellets and uses 2,500 J for cellular respiration. What is the production efficiency of this owl?

Use the following figure to answer the question. Consider the global water cycle depicted in the figure. Where is the greatest flux of water from one reserve to another?

The Hubbard Brook watershed deforestation experiment yielded all of the following results except which of the following?