Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 54, Problem 10TYK
Which of the following statements is supported by the results of studies at the Hubbard Brook Experimental Forest?
a. Most of the energy captured by primary producers is lostbefore it reaches the highest trophic level in an ecosystem.
b. Deforested watersheds experience significantly less runoffthan undisturbed watersheds.
c. Deforested watersheds lose more calcium and nitrogen inrunoff than undisturbed watersheds.
d. Nutrients generally move through biogeochemical cycles veryquickly.
e. Deforested watersheds generally receive more rainfall thanundisturbed watersheds.
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Primary”succession is succession that:a.involves establishment of primary producers where there were none.b.leads to establishment of a climax community dominated by primaryproducers.c.occurs on newly exposed geologic substrates, not organic soil.d.occurs where organic soils have been exposed but not destroyed bydisturbance.e.occurs after fire or agricultural abandonment.
Which of the following statements about the phosphorus cycle is correct?
a. Phosphorus is fixed by plants and algae.
b. Most phosphorus released from rocks is carried to the oceans by rivers.
c. Animals cannot get their phosphorus from eating plants and algae.
d. Fertilizer use has not affected the global phosphorus budget.
EcosystemA hasprimary production of 1000 g C /m2/yr and ecological efficiency of 10%. Ecosystem B has primary production of 300 g C /m2/yr and an ecological efficiency of 25%.
a.Which ecosystem will have more production at thesecondary consumer (carnivore) trophic level?
b.Which ecosystem is more likely to support an endothermic primary consumer (herbivore)?
c.If atrophic level requires at least 1 gC/m2/yr in order to exist, how many trophic levels can each of these ecosystems support?d.Given your answer to part c, which do you thinkhas a larger impact on the energy available at upper trophic levels: primary productivity or efficiency of energy movement across trophic levels?
Chapter 54 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 54.1 - In the generalized compartment model of...Ch. 54.1 - Prob. 2SBCh. 54.1 - Prob. 3SBCh. 54.2 - What is the difference between gross primary...Ch. 54.2 - What environmental factors influence rates of...Ch. 54.2 - Why is energy lost from an ecosystem at every...Ch. 54.2 - Prob. 4SBCh. 54.3 - Prob. 1SBCh. 54.3 - Prob. 2SBCh. 54.3 - Prob. 3SB
Ch. 54.3 - What is Earths main reservoir for phosphorus, and...Ch. 54.4 - Prob. 1SBCh. 54.4 - Prob. 2SBCh. 54.4 - Prob. 3SBCh. 54 - Prob. 1TYKCh. 54 - The total dry weight of plant material in a forest...Ch. 54 - Prob. 3TYKCh. 54 - Prob. 4TYKCh. 54 - Which process moves nutrients from the available...Ch. 54 - Which of the following materials has a sedimentary...Ch. 54 - Prob. 7TYKCh. 54 - Prob. 8TYKCh. 54 - The amount of energy available at the highest...Ch. 54 - Which of the following statements is supported by...Ch. 54 - Prob. 11TYKCh. 54 - Prob. 12TYKCh. 54 - Prob. 13TYKCh. 54 - Prob. 14TYKCh. 54 - Prob. 15TYKCh. 54 - Prob. 16TYKCh. 54 - Prob. 1ITD
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