WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 17, Problem 5SA
Summary Introduction
To review:
The energy flow through an ecosystem and how it influences the number of top carnivores.
Introduction:
Energy flows from the producers (the plants), to herbivores, carnivores and top carnivores.
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Assume that humans are the second-level carnivores and that each energy unit in their level represents 25 people. How many people can be supported in the ecosystem?
The average efficiency of energy transfer between trophic levels is 10%. Use this efficiency to determine how much phytoplankton mass is required to add just 1 gram (0.04 ounce) of new mass to a killer whale, which is a third-level or top carnivore. Create a diagram that summarizes the different trophic levels and the relative size and abundance of organisms at each level. How would your answer change if the efficiency were half the average rate? Twice the average rate?
Which of the following statements BEST describes energy transfer in an ecosystem?
A.
If the primary producer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer.
B.
If the primary consumer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer.
C.
If the primary consumer has 175,000 kcal available, the tertiary consumer will receive 175 kcal from the secondary consumer.
D.
If the primary producer has 175,000 kcal available, the tertiary consumer will receive 17,500 kcal from the secondary consumer.
Chapter 17 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is food chain?Explain the different types of food chains in the ecosystem.arrow_forwardEnergy transferred from one trophic level to the next in an ecosystem is measured in calories, numbers, and in biomass. If a rangeland has a biomass of 100, 000g/m2 from the grass, how much biomass will be available in human beings who eat the cow that eat that grass?arrow_forwardA trade-off of heterotrophic carnivores in gaining energy is that food is: scarce but it's easy to capture and kill their very nutritious food. abundant but it's nutritious. scarce but it's nutritious. abundant but it's difficult to capture and kill their very nutritious food.arrow_forward
- Explain why there are differences in the efficiency of energy transfer between trophic levels. Explain what happens to the energy which is not transferred to the next trophic level in a food chain when one organism feeds on another.arrow_forwardDescribe the flow of energy through an ecosystem.arrow_forwardHow much energy is passed from one trophic level to the next? Explain why.arrow_forward
- Trophic Cascade Concept Map Primary Producers: Include at least two different types of primary producers (plants, algae, or other autotrophs) in the ecosystem. Herbivores: Identify herbivores that feed on the primary producers you chose or invented. Include 2 different species that might consume your primary producers Primary and/or Secondary Carnivores Introduce at least 2 carnivores that prey on herbivores or other carnivores. Demonstrate a cascading effect on the ecosystem. Biotic Interactions-Highlight various biotic interactions, such as mutualism, competition, and especially predation, among different organisms in the community.arrow_forwardHow does energy movee through an ecosystem from one trophic level to the next and what is the consequences of human diet choices on ecosystem resources?arrow_forwardWhat is a food web? How does the amount of primary productivity influence the number of trophic levels in a food web as well as the number of species at the top? Explain the difference between top down and bottom up control in food webs.arrow_forward
- The position of an organism within a food web is described by its trophic level. When modeling energy dynamics of a food web, losses of energy at these different levels produces a pyramid-shaped distribution of available energy. True or False?arrow_forwardWhich of the following is true of trophic relationships in an ecosystem? All energy in the food chain is ultimately transferred to top level carnivores Most of the useable energy transferred between trophic levels is maintained--very little is lost The trophic pyramid predicts that top level carnivores should have the least amount of biomass in an ecosystem Net productivity is typically a measure of over-all photosynthesis in an ecosystemarrow_forward“The pyramid of energy is always upright” states that A)The energy conversion efficiency of herbivores is better than carnivores. B)The energy conversion efficiency of carnivores is better than herbivores C)Producers have the lowest energy conversion efficiency D)Energy conversion efficiency is the same in all trophic levelsarrow_forward
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