Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 28, Problem 3RQ
Define net primary production. Would you predict higher productivity in a farm pond or an alpine lake? Explain your answer.
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Define Gross Primary Productivity.
What is Primary Production and what are the factors that limit primary production in terrestrial and aquatic ecosystems. Give examples of where some of the most productive systems are on land and in water. Distinguish between Gross Primary Productivity and Net Primary Productivity
What is the difference between gross primary productivity and net primary productivity.
Chapter 28 Solutions
Biology: Life on Earth
Ch. 28 -
1. Nearly all life gets its energy from _______...Ch. 28 -
2. Photosynthetic organisms are called either...Ch. 28 -
3. Feeding levels within ecosystems are also...Ch. 28 - In general, only about ______ percent of the...Ch. 28 - Prob. 5FTBCh. 28 -
6. During the nitrogen cycle, nitrogen gas is...Ch. 28 - Prob. 7FTBCh. 28 - Prob. 1RQCh. 28 -
2. What is a producer? What trophic level does it...Ch. 28 - 3. Define net primary production. Would you...
Ch. 28 - Name the first three trophic levels. Among the...Ch. 28 - How do food chains and food webs differ? Which is...Ch. 28 - Define detritivore and decomposer and explain...Ch. 28 -
7. Trace the movement of carbon from one of its...Ch. 28 - Prob. 8RQCh. 28 - Trace a pathway of a phosphorus molecule from a...Ch. 28 - Trace the movement of a water molecule from the...Ch. 28 -
1. Humans are omnivores who can feed on several...Ch. 28 - Define and give an example of biological...Ch. 28 - Discuss the contribution of human population...Ch. 28 - Describe what would happen to a population of deer...
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- Primary productivity on land is affected by _______. a. nutrient availability c. temperature b. amount of sunlight d. all of the abovearrow_forwardIn what type of ecosystem would you find high productivity? Why or why not? Explain your answer.arrow_forwardDistinguish between gross primary productivity (GPP) and net primary productivity (NPP)arrow_forward
- Compare and contrast the measurement of primary productivity in terrestrial versus aquatic ecosystems.arrow_forwardHow could you generate an estimate of total NPP from all producers in system like a lake, pond, or stream?arrow_forwardDefine productivity as the word is used in ecology. What is a pri-mary producer? What is the distinction between gross productivity, net productivity, and respiration? How is net productivity related to biomass (or standing crop)?arrow_forward
- If the gross primary productivity is 100 g/m2/year and the respiration rate is 37 g/m2/year what is the net primary productivity? Group of answer choices a. 37 g/m2/year b. can’t tell from the information given c. 50 g/m2/year d. 63 g/m2/year e. 25 g/m2/yeararrow_forwardAs a general rule, how much energy is lost in the transmission of energy from one trophic level to the one immediately above it? a. 1% b. 10% c. 90% d. 50%arrow_forwardIndicate whether the statement is true or false: Aquatic ecosystems can receive a large input of a limiting nutrient from the runoff from heavily fertilized fieldsarrow_forward
- Compare and contrast potential solutions to desertification through agriculture.arrow_forwardNet primary production per unit area is likely to be highest in which of the following ecosystems?a. grasslandsb. desertsc. temperate deciduous forestsd. tropical rain forestsarrow_forwardThe gross primary productivity is 100 g/m2/year and the respiration rate is 57 g/m2/year . If the standing crop (of plants) in the above question is 145 g/m2 what will the standing crop (of plants) be a year later, assuming no death/predation? Group of answer choices can't tell from the information given a. 188 g/m2 b. 145 g/m2 c. 245 g/m2 d. 182 g/m2arrow_forward
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