Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 52, Problem 8TYU
MODEL Draw a vertical food chain (part of a food web) showing that sea urchins eat kelp and that sea otters eat sea urchins. Use this model to: (1) show or explain how a trophic cascade works; and (2) offer an explanation for why otters are considered a keystone species.
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Chapter 52 Solutions
Biological Science (6th Edition)
Ch. 52 - 1. What is niche differentiation?
a. the evolution...Ch. 52 - 2. The relationship between ants and treehoppers...Ch. 52 - 3. What is one advantage of inducible defenses?
a....Ch. 52 - Pioneer species tend to have high ________ and...Ch. 52 - Cite an example to explain why species...Ch. 52 - Prob. 6TYUCh. 52 - What is a disturbance? Consider the role of fire...Ch. 52 - 8. MODEL Draw a vertical food chain (part of a...Ch. 52 - You are a walking, talking community that includes...Ch. 52 - 10. Suppose that a two-acre lawn on your college’s...
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- Explain how/why ecologists can use trophic cascades to understand the “bottom up” vs. “top down” dynamic of a systemarrow_forwardPlease help me to answer part a-b Thank you a) Define the two terms "keystone species" and "trophic cascade." b) Give an example of a keystone species that causes a trophic cascade when removed from its ecosystem. Name the species and briefly describe what happens when it is removed.arrow_forwardIn your own case study, describe and illustrate how changes in an organismal population can have unintended effects on trophic levels or ecosystems. Identify the organisms and nutrients that are present in your trophic pyramid. Describe the normal flow of your trophic cascade along with whether removal or introduction of the organism has a positive or negative effect on other organisms or nutrient levels within an ecosystem.arrow_forward
- Describe feeding relationships and energy flow, and use them to identify trophic levels and navigate food websarrow_forwardThe following is NOT true about trophic levels Animals capable of feeding at many trophic levels will be able to survive if portions of their food supply are decreased or eliminated Secondary consumers belong to the third trophic level Primary consumers belong to the first trophic level Each stage through which energy travels is called a trophic levelarrow_forwardRead the article on the impact of Phenological Changes on Trophic Dynamics. 2. Why is this mismatch occurring (please use details), and describe how this positively and negatively impact the bears? How could this positively and negatively impact the salmon? How could this positively and negatively impact the elderberry?arrow_forward
- Indentify the correct food web for each question. Which type of food web cycles materials and moves energy into and out of the community? Grazing Which type of food web is dominant in Central Park's forests and pond? Detrital Which food web includes humans? Grazingarrow_forwardSupport this with evidence: In this food web model, plants A, B and C are the autotrophic organisms that serve as the producers of the food web model. The herbivores A, B and C serve as the primary consumers meanwhile the omnivores A and B serve as the secondary consumers of this model. Then, the last level is the top predator. To describe the model formulated, the populations of these organisms, in a particular ecosystem, was recorded over a period of 61 days. It is observed that at Day 0, the plant populations are the highest, which is around 5000. The herbivore populations are found in a range of 2000-3000 and the omnivore populations can be seen to be below 1000. With gradual increase in the number of days, we can see here that the food chain is coming into play. The green plants are being consumed by the herbivores, leading to fluctuations in the plant populations. The herbivores are, in turn, being consumed by the omnivores. We can see that with increasing time, only…arrow_forwardDRAW IT In the Chesapeake Bay estuary, the blue crab is anomnivore that eats eelgrass and other primary producers as wellas clams. It is also a cannibal. In turn, the crabs are eaten byhumans and by the endangered Kemp’s Ridley sea turtle. Basedon this information, draw a food web that includes the bluecrab. Assuming that the top-down model holds for this system,describe what would happen to the abundance of eelgrass ifhumans stopped eating blue crabs.arrow_forward
- Food webs are helpful diagrams to understand the relationships of organisms within a biological community. Answer the following questions using the food web below. Baleen whale Smaller toothed Sperm whale whales Penguins Elephant seal Leopard seal Other birds Fish Other seals Squid Krill Other herbivorous zooplankton Carnivorous zooplankton Phytoplankton Which of the following can be a secondary consumer? squid other seals krill herbivorous zooplankton fish other birds elephant sealarrow_forwardhttps://www.biointeractive.org/classroom-resources/exploring-trophic-cascades create a case study based on additional research into other examples of trophic cascades. describe and illustrate how changes in an organismal population can have unintended effects on trophic levels or ecosystems. Identify the organisms and nutrients (if applicable) that are present in your trophic pyramid. Describe the normal flow of your trophic cascade along with whether removal or introduction of the organism has a positive or negative effect on other organisms or nutrient levels within an ecosystem.arrow_forwardA niche is loosely defined as an organism's role in its environment, which can include factors such as feeding preference, nesting behaviors, mating behaviors, method of obtaining prey, and local habitats. Keeping Gause's law in mind, do some research on the California red-legged frog and the North Pacific tree frog (use wiki or another Google search). Create a chart comparing the two with respect to their niche or lifestyle that can explain how these two frogs can co-exist in the same ecosystem.arrow_forward
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Energy flow in ecosystem; Author: MooMooMath and Science;https://www.youtube.com/watch?v=5jBV9vJmXZI;License: Standard youtube license