Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 55, Problem 6TYK
Which of the following statements concerning net ecosystem production and net primary production is false?
- a. NEP will always be less than NPP because it takes the respiration of heterotrophs and decomposers into account.
- b. If measurements indicate that more CO2 enters an ecosystem than leaves, NEP would be positive.
- c. If measurements indicate that more O2 leaves an ecosystem than enters, NEP would be negative.
- d. An increase in the rate of decomposition in an ecosystem would lower NEP, but NPP would probably remain the same or perhaps increase.
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Chapter 55 Solutions
Study Guide for Campbell Biology
Ch. 55 - What may happen if the input of a mineral nutrient...Ch. 55 - Compare the movement of energy and chemical...Ch. 55 - a. List some ecosystems with high primary...Ch. 55 - a. Why is production efficiency higher for fishes...Ch. 55 - What is the biological importance of water,...Ch. 55 - a. In which natural ecosystem do nutrients cycle...Ch. 55 - Contrast bioremediation and biological...Ch. 55 - Prob. 1SYKCh. 55 - What is secondary production? How does it relate...Ch. 55 - What processes mediate the interconversion of the...
Ch. 55 - The inefficiency of energy transformations is...Ch. 55 - Which of the following statements about ecosystems...Ch. 55 - Primary production is a. equal to the standing...Ch. 55 - The open ocean and tropical rain forest are the...Ch. 55 - Production in terrestrial ecosystems is affected...Ch. 55 - Which of the following statements concerning net...Ch. 55 - Secondary production is a. measured by the...Ch. 55 - Most food chains have only three to five links....Ch. 55 - Some authors have suggested that humans world-wide...Ch. 55 - Which of the following organisms would you predict...Ch. 55 - If a bird eats seeds with an energy content of 400...Ch. 55 - Biogeochemical cycles are global for elements a....Ch. 55 - The atmosphere is the main reservoir for a. water...Ch. 55 - Which of these processes is incorrectly paired...Ch. 55 - Clear-cutting tropical forests yields agricultural...Ch. 55 - Plants, prokaryotes, and fungi are useful in...Ch. 55 - Which of the following actions is an example of...
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- Propose a reason why the CO2 fluxes are greater for terrestrial biological activity than for marine biological activity.arrow_forwardIn the English Channel ecosystem, the number of primary producers is smaller than the number of primary consumers because________. a. the apex consumers have a low turnover rate b. the primary producers have a low turnover rate c. the primary producers have a high turnover rate d. the primary consumers have a high turnover ratearrow_forwardWhat would happen to an ecosystem if (a) all its decomposers and detritus feeders were eliminated, (b) all of its producers were eliminated, or (c) all of its insects were eliminated? Could an ecosystem exist with producers and decomposers but no consumers? Explain.arrow_forward
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- In a pond ecosystem, mosquito larvae feed on photosynthetic algae. Other larvae, such as dragonfly larvae, feed on the mosquito larvae. The dragonfly larvae are, in turn, consumed by fish, whichcan be preyed upon by raccoons.Which organism is a primary consumer in this ecosystem? 1.Mosquito larvae2. Fish3. Algae4. Dragonfly larvaearrow_forward1) A scientist finds that the gross primary productivity of the grasslands of the central United States is 55 g / m2 / year. If the respiration loss is 33 g / m2 / year, what is the net primary productivity? a) subtraction from gross productivity and respiration.b) The same as primary productivity.c) The value of respiration.d) The sum of gross primary productivity and respiration.arrow_forwardWhat would happen to an ecosystem if (a) all of its decomposers and detritus feeders were eliminated, (b) all of its producers were eliminated, and (c) all of its insects were eliminated? Could an ecosystem function with only producers and decomposers and no consumers? Explain.arrow_forward
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